阅读说明：本技术 一种高效的止血剂推进器 (Efficient styptic propeller ) 是由 冯聪 陈力 黄赛 杨博 滕玥 崔翔 陈骅 王莉荔 于 2020-11-20 设计创作，主要内容包括：一种高效的止血剂推进器,包括外筒(1)、内筒(2)、推进管(3)、调整连接件(4)、外活塞(5)和内活塞(6),外筒(1)和内筒(2)同轴设置,之间留有空间,空间内设置有外活塞(5),内筒(2)内设置有内活塞(6)；外筒(1)具有第一出口(7),内筒(2)具有第二出口(8),第一出口(7)和第二出口(8)同轴设置；内筒(2)的前端具有多个沿径向均匀布置的支撑体(9)；推进管(3)通过调整连接件(4)与第一出口(7)连接；推进管(3)由医用PE和医用聚酰胺制备而成。本发明主要针对腔洞型出血创面使用,可根据需求注射不同类型和容量的止血剂,将其输送至出血点,以封闭出血点,本发明使用便捷、灵活、高效。(A high-efficiency hemostatic propeller comprises an outer cylinder (1), an inner cylinder (2), a propelling pipe (3), an adjusting connecting piece (4), an outer piston (5) and an inner piston (6), wherein the outer cylinder (1) and the inner cylinder (2) are coaxially arranged, a space is reserved between the outer cylinder and the inner cylinder, the outer piston (5) is arranged in the space, and the inner piston (6) is arranged in the inner cylinder (2); the outer cylinder (1) is provided with a first outlet (7), the inner cylinder (2) is provided with a second outlet (8), and the first outlet (7) and the second outlet (8) are coaxially arranged; the front end of the inner cylinder (2) is provided with a plurality of supporting bodies (9) which are uniformly arranged along the radial direction; the propelling pipe (3) is connected with the first outlet (7) through the adjusting connecting piece (4); the propelling pipe (3) is prepared from medical PE and medical polyamide. The invention is mainly used for cavity type bleeding wound surfaces, different types and volumes of hemostats can be injected according to requirements and are conveyed to bleeding points to seal the bleeding points, and the invention is convenient, flexible and efficient to use.)

1. A high-efficiency hemostatic propeller is characterized by comprising an outer cylinder (1), an inner cylinder (2), a propelling pipe (3), an adjusting connecting piece (4), an outer piston (5) and an inner piston (6), wherein the outer cylinder (1) and the inner cylinder (2) are coaxially arranged, the inner cylinder (2) is arranged in the outer cylinder (1), a space is reserved between the cylinders of the outer cylinder (1) and the inner cylinder (2), the outer piston (5) is arranged in the space, and the inner piston (6) is arranged in the inner cylinder (2); the front end of the outer cylinder (1) is provided with a first outlet (7) which is tapered into a thin cylinder in a conical manner, the front end of the inner cylinder (2) is provided with a second outlet (8) which is tapered into a thin cylinder in a conical manner, the first outlet (7) and the second outlet (8) are coaxially arranged, and the second outlet (8) is arranged in the first outlet (7); the front end of the inner cylinder (2) is provided with a plurality of supporting bodies (9) which are uniformly arranged along the radial direction, and the supporting bodies (9) are arranged in the space and support and fix the mutual positions of the outer cylinder (1) and the inner cylinder (2);

the propulsion pipe (3) is connected with the first outlet (7) through an adjusting connecting piece (4), the adjusting connecting piece (4) comprises a main body, a central liquid outlet (10) is arranged at the center of the main body, and a plurality of circumferential liquid outlets (11) are uniformly distributed on the circumference of the end surface of the main body; the rear end of the main body is connected with a fixed ring, a first adjusting ring (12) and a second rotating adjusting ring (13) are arranged between the rear end of the main body and the fixed ring, an adjusting rod (14) is arranged on the first adjusting ring (12), the adjusting rod (14) is connected with a connecting rod (15) inside the first rotating adjusting ring (12) through an elastic buckling device, and a first blocking piece (16) matched with the shape and size of the second outlet (8) is arranged at the free end of the connecting rod (15); a plurality of second blocking pieces (17) which are uniformly arranged at intervals are arranged in the second rotary adjusting ring (13), and the plurality of second blocking pieces (17) are respectively matched with the shapes and sizes of the plurality of circumferential liquid outlets (11); the other end of the fixed ring is fixedly arranged on the base, and the base is connected with the first outlet (7);

the propulsion pipe (3) is prepared from medical PE and medical polyamide, wherein the weight percentages of the two are as follows: 78-65% of medical PE55 and 35-45% of medical polyamide; the preparation method comprises the steps of fully mixing the two materials in a reaction kettle, heating to the temperature of 260-280 ℃, keeping for 2-3h to enable the materials to reach a molten state, putting the materials into an extruder, pushing the mixture of the two materials into an extrusion die head through a screw in the extruder, performing melt extrusion, performing vacuum cooling setting and drying at the temperature of 32-35 ℃ after molding, drawing out a molded PE pipe material by a drawing-out machine, and cutting the PE pipe material into a required length to obtain a finished product of the push pipe (3).

2. The high-efficiency hemostat pusher according to claim 1, characterized in that the outer piston (5) is connected with a hollow tubular outer piston rod, the inner piston (6) is connected with a cylindrical inner piston rod, the outer piston rod is arranged in said space, the inner piston rod can be inserted and slid inside the outer piston rod; the rear ends of the inner and outer piston rods present an enlargement, respectively, allowing to manually move the inner and outer piston rods.

3. The high-efficiency hemostat pusher according to claims 1-2, characterized in that the pusher tube (3) is connected to the adjusting connector (4) through a tube end connector, the pusher tube (3) is fixed to the tube end connector, and the other end of the tube end connector is connected to the front end of the main body of the adjusting connector (4) through a screw thread.

4. The high efficiency hemostat pusher of claim 3, wherein the axial positioning between the main body of the adjusting connector (4), the first adjusting ring (12), the second rotating adjusting ring (13) and the fixed ring is achieved by positioning rings; the fixing ring and the base are sealed through the sealing ring, and the sealing ring is sleeved outside the main body and used for sealing connection between the pipe end connector and the adjusting connecting piece (4).

5. The efficient hemostatic agent pusher according to claims 3-4, wherein the medical PE comprises the following components in parts by weight: high molecular weight PE30-40 parts, basic calcium phosphate 30-35 parts, carboxymethyl chitosan 20-30 parts and 1, 2-ethylene glycol 40-50 parts; mixing high molecular weight PE, basic calcium phosphate, carboxymethyl chitosan and 1, 2-ethylene glycol, and hot-pressing to form; the mixing temperature is 92-96 ℃, the mixing time is 33-35min, the hot press molding temperature is 120-130 ℃, the hot press molding time is 5-8h, and the hot press molding pressure is 8-10 KN.

6. The high-efficiency hemostat pusher according to claim 5, characterized in that said pusher tube (3) is prepared by surface treatment after cooling, setting and drying, comprising: activating by UV irradiation for 5-10min, adding the propelling pipe (3) into the silver-carrying nano titanium dioxide disinfectant, simultaneously carrying out UV irradiation for 10-15min, finally cleaning the propelling pipe (3) with ultrapure water for 3-5 times, and drying.

7. The efficient hemostat thruster of claim 6, wherein the disinfection solution carrying silver nano-titania is: adding the silver-loaded nano titanium dioxide antibacterial agent into a mixed solution of ultrapure water and dimethyl methanol in a weight ratio of 1:5:2, magnetically stirring for 10-15min, adding vinyl triethoxy siloxane accounting for 15-20% of the mixed solution in mass and methacrylate accounting for 10-15% of the mixed solution in mass, and initiating by using 2,2' -azobis (2-methyl propionitrile).

8. The high efficiency hemostatic agent mover of claims 6-7, wherein the enlarged portion is circular, rectangular, or oval in shape; the particle size of the basic calcium phosphate is 60-80 μm.

Technical Field

The invention relates to the field of medical instruments, in particular to a high-efficiency hemostatic pusher.

Background

Penetration is one of the main types of trauma, which can cause cavity wounds in the body, which can lead to massive blood loss. At present first aid hemostasis commonly used is all for commonly using and simple hemostasis method, and main medicament hemostasis and dressing hemostasis, but whichever all is the body surface to the patient among these two stanchs the operation, and the hemorrhage point of running through the wound is located the inside of cavity, therefore the hemostasis operation effect of body surface is comparatively limited, often is invalid to the hemostasis of common degree of depth cavity type wound, wraps through ordinary and can't realize the hemostasis to ligature oppression hemostasis is hardly realized.

The technical means of stopping bleeding by penetrating into the cavity wound also appears in the prior art, but the defects are that the front end of an injection vessel is thick, and the defects of difficult insertion into the wound, low efficiency and easy aggravation of pain of a patient caused by penetration injury such as gunshot injury and puncture are overcome due to the small wound area.

Therefore, there is a need for an efficient hemostatic agent pusher to ensure easier and efficient injection of a medical hemostatic agent to a target site.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a high-efficiency hemostat propeller. The invention is mainly used for cavity type bleeding wound surfaces, different types and volumes of hemostats can be injected according to requirements and are conveyed to a wound bleeding point to seal the bleeding point, and the invention is convenient, flexible and efficient to use.

In order to achieve the aim, the invention provides an efficient hemostatic propeller which comprises an outer cylinder, an inner cylinder, a propelling pipe, an adjusting connector, an outer piston and an inner piston, wherein the outer cylinder and the inner cylinder are coaxially arranged, the inner cylinder is arranged in the outer cylinder, a space is reserved between the cylinders of the outer cylinder and the inner cylinder, the outer piston is arranged in the space, and the inner piston is arranged in the inner cylinder; the front end of the outer cylinder is provided with a first outlet which is tapered into a thin cylinder in a conical manner, the front end of the inner cylinder is provided with a second outlet which is tapered into a thin cylinder in a conical manner, the first outlet and the second outlet are coaxially arranged, and the second outlet is arranged in the first outlet; the front end of the inner cylinder is provided with a plurality of supporting bodies which are uniformly arranged along the radial direction, and the supporting bodies are arranged in the space and used for supporting and fixing the mutual positions of the outer cylinder and the inner cylinder;

the propelling pipe is connected with the first outlet through an adjusting connecting piece, the adjusting connecting piece comprises a main body, a central liquid outlet is arranged in the center of the main body, and a plurality of circumferential liquid outlets are uniformly distributed on the circumference of the end face of the main body; the rear end of the main body is connected with the fixing ring, a first adjusting ring and a second rotating adjusting ring are arranged between the rear end of the main body and the fixing ring, an adjusting rod is arranged on the first adjusting ring and connected with a connecting rod in the first rotating adjusting ring through an elastic buckle device, and a first blocking piece matched with the shape and size of the second outlet is arranged at the free end of the connecting rod; a plurality of second blocking pieces which are uniformly arranged at intervals are arranged inside the second rotary adjusting ring, and the plurality of second blocking pieces are respectively matched with the shapes and the sizes of the plurality of circumferential liquid outlets; the other end of the fixed ring is fixedly arranged on the base, and the base is connected with the first outlet;

the propulsion pipe is prepared from medical PE and medical polyamide, wherein the weight percentages of the two are as follows: 78-65% of medical PE55 and 35-45% of medical polyamide; the preparation method comprises the steps of fully mixing the two materials in a reaction kettle, heating to the temperature of 260-280 ℃, keeping for 2-3h to enable the materials to reach a molten state, putting the materials into an extruder, pushing the mixture of the two materials into an extrusion die head through a screw in the extruder, performing melt extrusion, performing vacuum cooling setting and drying at the temperature of 32-35 ℃ after molding, drawing out a molded PE pipe material by a drawing-out machine, and cutting the PE pipe material into a required length to obtain a finished product of a push pipe.

Preferably, the outer piston is connected with a hollow tubular outer piston rod, the inner piston is connected with a cylindrical inner piston rod, the outer piston rod is arranged in the space, and the inner piston rod can be inserted and slide in the outer piston rod; the rear ends of the inner and outer piston rods present an enlargement, respectively, allowing to manually move the inner and outer piston rods.

In any of the above embodiments, preferably, the pushing tube is connected to the adjusting connector through a tube end connector, the pushing tube is fixed to the tube end connector, and the other end of the tube end connector is connected to the front end of the main body of the adjusting connector through a thread.

In any of the above schemes, preferably, the main body, the first adjusting ring, the second rotating adjusting ring and the fixing ring of the adjusting connector are axially positioned through positioning rings; the fixing ring and the base are sealed through the sealing ring, and the sealing ring is sleeved outside the main body and used for sealing connection between the pipe end connector and the adjusting connecting piece.

In any of the above embodiments, preferably, the medical PE comprises the following components in parts by weight: high molecular weight PE30-40 parts, basic calcium phosphate 30-35 parts, carboxymethyl chitosan 20-30 parts and 1, 2-ethylene glycol 40-50 parts; mixing high molecular weight PE, basic calcium phosphate, carboxymethyl chitosan and 1, 2-ethylene glycol, and hot-pressing to form; the mixing temperature is 92-96 ℃, the mixing time is 33-35min, the hot press molding temperature is 120-130 ℃, the hot press molding time is 5-8h, and the hot press molding pressure is 8-10 KN.

In any of the above embodiments, preferably, the surface treatment is performed after the cooling, setting and drying of the propulsion pipe during the preparation, and includes: activating by UV irradiation for 5-10min, adding the propelling tube into the silver-loaded nano titanium dioxide disinfectant, simultaneously performing UV irradiation for 10-15min, finally cleaning the propelling tube with ultrapure water for 3-5 times, and drying.

In any of the above schemes, preferably, the disinfectant solution of silver-loaded nano titanium dioxide is: adding the silver-loaded nano titanium dioxide antibacterial agent into a mixed solution of ultrapure water and dimethyl methanol in a weight ratio of 1:5:2, magnetically stirring for 10-15min, adding vinyl triethoxy siloxane accounting for 15-20% of the mixed solution in mass and methacrylate accounting for 10-15% of the mixed solution in mass, and initiating by using 2,2' -azobis (2-methyl propionitrile).

In any of the above aspects, it is preferable that the enlarged portion has a circular, rectangular or elliptical shape; the particle size of the basic calcium phosphate is 60-80 μm.

The invention has the beneficial effects that:

1. the invention is mainly used for cavity type bleeding wound surfaces, different types and volumes of hemostats can be injected according to requirements and are conveyed to a wound bleeding point to seal the bleeding point, and the invention is convenient, flexible and efficient to use.

2. The invention can select different types of hemostatic to be filled into the outer barrel or the inner barrel, so as to select proper hemostatic to be injected into a bleeding point for hemostasis according to different requirements, and can independently inject different types of hemostatic or mix the hemostatic before injection through the adjusting connecting piece, for example, when the second rotating adjusting ring is rotated, whether the second baffle plate of the second rotating adjusting ring is coincided with the position of the circumferential liquid outlet or not is selected, and whether the hemostatic in the outer barrel is allowed to flow out or not can be selected; the hemostatic agent in the inner barrel can be selected to flow out or not by pressing the adjusting rod to select whether the first blocking piece on the connecting rod of the first adjusting ring is coincided with the position of the second outlet or not (pressing the adjusting rod to make the first blocking piece of the connecting rod be coincided with the position of the second outlet through the control of the elastic buckling device, and then pressing the adjusting rod to make the first blocking piece of the connecting rod be separated from the position of the second outlet through the control of the elastic buckling device). In addition, the same type of hemostatic can be selected to be filled into the outer barrel and the inner barrel, so that the proper amount of hemostatic can be selected according to the amount of bleeding, namely, the same type of hemostatic in the outer barrel and the inner barrel can be simultaneously injected into the bleeding position by adjusting the first adjusting ring and the second adjusting ring, so as to increase the amount of the injected hemostatic. Therefore, different types or volumes of hemostatic agents can be selected, so that the invention is more convenient and efficient.

3. The propelling pipe used by the invention can solve the problems of low hardness, poor rigidity and the like of single-component materials, has good biocompatibility, higher pipe hardness and better rigidity, and is antibacterial, safe and reliable. The propelling pipe also has the advantages of high flexibility, strong wear resistance and long service life, and can efficiently inject the hemostatic agent into bleeding points to promote wound healing and hemostasis.

Brief description of the drawings

Fig. 1 is a front view of a high efficiency hemostatic agent pusher according to the present invention;

FIG. 2 is a left side view of a trim connector of a high efficiency hemostatic agent pusher according to the present invention;

figure 3 is a front view of a first adjustment ring and a second rotating adjustment ring of a high efficiency hemostatic agent pusher according to the present invention.

Detailed Description

The technical solutions of the present application will be described in detail below with reference to the detailed description of the present application and the accompanying drawings, but the following examples are only for the understanding of the present invention, the examples and features of the examples in the present application can be combined with each other, and the present application can be implemented in many different ways as defined and covered by the claims.

Example 1

Referring to fig. 1-3, a high-efficiency hemostatic pusher comprises an outer cylinder 1, an inner cylinder 2, a pusher tube 3, an adjusting connector 4, an outer piston 5 and an inner piston 6, wherein the outer cylinder 1 and the inner cylinder 2 are coaxially arranged, the inner cylinder 2 is arranged in the outer cylinder 1, a space is left between the cylinders of the outer cylinder 1 and the inner cylinder 2, the outer piston 5 is arranged in the space, and the inner piston 6 is arranged in the inner cylinder 2; the front end of the outer cylinder 1 is provided with a first outlet 7 which is conically tapered into a thin cylinder, the front end of the inner cylinder 2 is provided with a second outlet 8 which is conically tapered into a thin cylinder, the first outlet 7 and the second outlet 8 are coaxially arranged, and the second outlet 8 is arranged in the first outlet 7; the front end of the inner cylinder 2 is provided with a plurality of supporting bodies 9 which are uniformly arranged along the radial direction, and the supporting bodies 9 are arranged in the space and support and fix the mutual positions of the outer cylinder 1 and the inner cylinder 2;

the propulsion pipe 3 is connected with the first outlet 7 through an adjusting connecting piece 4, the adjusting connecting piece 4 comprises a main body, a central liquid outlet 10 is arranged in the center of the main body, and a plurality of circumferential liquid outlets 11 are uniformly distributed on the circumference of the end surface of the main body; the rear end of the main body is connected with a fixed ring, a first adjusting ring 12 and a second rotating adjusting ring 13 are arranged between the rear end of the main body and the fixed ring, an adjusting rod 14 is arranged on the first adjusting ring 12, the adjusting rod 14 is connected with a connecting rod 15 inside the first rotating adjusting ring 12 through an elastic buckling device, and a first blocking piece 16 matched with the shape and size of the second outlet 8 is arranged at the free end of the connecting rod 15; a plurality of second baffles 17 which are uniformly arranged at intervals are arranged inside the second rotary adjusting ring 13, and the plurality of second baffles 17 are respectively matched with the shapes and sizes of the plurality of circumferential liquid outlets 11; the other end of the fixed ring is fixedly arranged on the base, and the base is connected with the first outlet 7;

the propelling pipe 3 is prepared from medical PE and medical polyamide, wherein the weight percentages of the two are as follows: 78-65% of medical PE55 and 35-45% of medical polyamide; the preparation method comprises the steps of fully mixing the two materials in a reaction kettle, heating to the temperature of 260-280 ℃, keeping for 2-3h to enable the materials to reach a molten state, putting the materials into an extruder, pushing the mixture of the two materials into an extrusion die head through a screw in the extruder, performing melt extrusion, performing vacuum cooling setting and drying at the temperature of 32-35 ℃ after molding, drawing out a molded PE pipe material by a drawing-out machine, and cutting the PE pipe material into required lengths to obtain a finished product of the push pipe 3.

The outer piston 5 is connected with a hollow tubular outer piston rod, the inner piston 6 is connected with a cylindrical inner piston rod, the outer piston rod is arranged in the space, and the inner piston rod can be inserted and slide in the outer piston rod; the rear ends of the inner and outer piston rods present an enlargement, respectively, allowing to manually move the inner and outer piston rods.

The propelling pipe 3 is connected with the adjusting connecting piece 4 through a pipe end connector, the propelling pipe 3 is fixed on the pipe end connector, and the other end of the pipe end connector is connected with the front end of the main body of the adjusting connecting piece 4 through threads.

The main body of the adjusting connecting piece 4, the first adjusting ring 12, the second rotating adjusting ring 13 and the fixed ring are axially positioned through positioning rings; the fixing ring and the base are sealed through the sealing ring, and the sealing ring is sleeved outside the main body and used for sealing connection between the pipe end connector and the adjusting connecting piece 4.

The medical PE comprises the following components in parts by weight: high molecular weight PE30-40 parts, basic calcium phosphate 30-35 parts, carboxymethyl chitosan 20-30 parts and 1, 2-ethylene glycol 40-50 parts; mixing high molecular weight PE, basic calcium phosphate, carboxymethyl chitosan and 1, 2-ethylene glycol, and hot-pressing to form; the mixing temperature is 92-96 ℃, the mixing time is 33-35min, the hot press molding temperature is 120-130 ℃, the hot press molding time is 5-8h, and the hot press molding pressure is 8-10 KN.

When the propulsion pipe 3 is prepared, the surface treatment is carried out after cooling, shaping and drying, and the method comprises the following steps: activating by UV irradiation for 5-10min, adding the propulsion tube 3 into the silver-loaded nano titanium dioxide disinfectant, simultaneously performing UV irradiation for 10-15min, finally cleaning the propulsion tube 3 with ultrapure water for 3-5 times, and drying.

The disinfectant of the silver-loaded nano titanium dioxide comprises: adding the silver-loaded nano titanium dioxide antibacterial agent into a mixed solution of ultrapure water and dimethyl methanol in a weight ratio of 1:5:2, magnetically stirring for 10-15min, adding vinyl triethoxy siloxane accounting for 15-20% of the mixed solution in mass and methacrylate accounting for 10-15% of the mixed solution in mass, and initiating by using 2,2' -azobis (2-methyl propionitrile).

The shape of the enlarged part is circular, rectangular or elliptical; the particle size of the basic calcium phosphate is 60-80 μm.

Example 2

Referring to fig. 1-3, a high-efficiency hemostatic pusher comprises an outer cylinder 1, an inner cylinder 2, a pusher tube 3, an adjusting connector 4, an outer piston 5 and an inner piston 6, wherein the outer cylinder 1 and the inner cylinder 2 are coaxially arranged, the inner cylinder 2 is arranged in the outer cylinder 1, a space is left between the cylinders of the outer cylinder 1 and the inner cylinder 2, the outer piston 5 is arranged in the space, and the inner piston 6 is arranged in the inner cylinder 2; the front end of the outer cylinder 1 is provided with a first outlet 7 which is conically tapered into a thin cylinder, the front end of the inner cylinder 2 is provided with a second outlet 8 which is conically tapered into a thin cylinder, the first outlet 7 and the second outlet 8 are coaxially arranged, and the second outlet 8 is arranged in the first outlet 7; the front end of the inner cylinder 2 is provided with a plurality of supporting bodies 9 which are uniformly arranged along the radial direction, and the supporting bodies 9 are arranged in the space and support and fix the mutual positions of the outer cylinder 1 and the inner cylinder 2;

the propulsion pipe 3 is connected with the first outlet 7 through an adjusting connecting piece 4, the adjusting connecting piece 4 comprises a main body, a central liquid outlet 10 is arranged in the center of the main body, and a plurality of circumferential liquid outlets 11 are uniformly distributed on the circumference of the end surface of the main body; the rear end of the main body is connected with a fixed ring, a first adjusting ring 12 and a second rotating adjusting ring 13 are arranged between the rear end of the main body and the fixed ring, an adjusting rod 14 is arranged on the first adjusting ring 12, the adjusting rod 14 is connected with a connecting rod 15 inside the first rotating adjusting ring 12 through an elastic buckling device, and a first blocking piece 16 matched with the shape and size of the second outlet 8 is arranged at the free end of the connecting rod 15; a plurality of second baffles 17 which are uniformly arranged at intervals are arranged inside the second rotary adjusting ring 13, and the plurality of second baffles 17 are respectively matched with the shapes and sizes of the plurality of circumferential liquid outlets 11; the other end of the fixed ring is fixedly arranged on the base, and the base is connected with the first outlet 7;

the propelling pipe 3 is prepared from medical PE and medical polyamide, wherein the weight percentages of the two are as follows: 78-65% of medical PE55 and 35-45% of medical polyamide; the preparation method comprises the steps of fully mixing the two materials in a reaction kettle, heating to the temperature of 260-280 ℃, keeping for 2-3h to enable the materials to reach a molten state, putting the materials into an extruder, pushing the mixture of the two materials into an extrusion die head through a screw in the extruder, performing melt extrusion, performing vacuum cooling setting and drying at the temperature of 32-35 ℃ after molding, drawing out a molded PE pipe material by a drawing-out machine, and cutting the PE pipe material into required lengths to obtain a finished product of the push pipe 3.

The outer piston 5 is connected with a hollow tubular outer piston rod, the inner piston 6 is connected with a cylindrical inner piston rod, the outer piston rod is arranged in the space, and the inner piston rod can be inserted and slide in the outer piston rod; the rear ends of the inner and outer piston rods present an enlargement, respectively, allowing to manually move the inner and outer piston rods.

The propelling pipe 3 is connected with the adjusting connecting piece 4 through a pipe end connector, the propelling pipe 3 is fixed on the pipe end connector, and the other end of the pipe end connector is connected with the front end of the main body of the adjusting connecting piece 4 through threads.

The main body of the adjusting connecting piece 4, the first adjusting ring 12, the second rotating adjusting ring 13 and the fixed ring are axially positioned through positioning rings; the fixing ring and the base are sealed through the sealing ring, and the sealing ring is sleeved outside the main body and used for sealing connection between the pipe end connector and the adjusting connecting piece 4.

The medical PE comprises the following components in parts by weight: high molecular weight PE30-40 parts, basic calcium phosphate 30-35 parts, carboxymethyl chitosan 20-30 parts and 1, 2-ethylene glycol 40-50 parts; mixing high molecular weight PE, basic calcium phosphate, carboxymethyl chitosan and 1, 2-ethylene glycol, and hot-pressing to form; the mixing temperature is 92-96 ℃, the mixing time is 33-35min, the hot press molding temperature is 120-130 ℃, the hot press molding time is 5-8h, and the hot press molding pressure is 8-10 KN.

When the propulsion pipe 3 is prepared, the surface treatment is carried out after cooling, shaping and drying, and the method comprises the following steps: activating by UV irradiation for 5-10min, adding the propulsion tube 3 into the silver-loaded nano titanium dioxide disinfectant, simultaneously performing UV irradiation for 10-15min, finally cleaning the propulsion tube 3 with ultrapure water for 3-5 times, and drying.

The disinfectant of the silver-loaded nano titanium dioxide comprises: adding the silver-loaded nano titanium dioxide antibacterial agent into a mixed solution of ultrapure water and dimethyl methanol in a weight ratio of 1:5:2, magnetically stirring for 10-15min, adding vinyl triethoxy siloxane accounting for 15-20% of the mixed solution in mass and methacrylate accounting for 10-15% of the mixed solution in mass, and initiating by using 2,2' -azobis (2-methyl propionitrile).

The shape of the enlarged part is circular, rectangular or elliptical; the particle size of the basic calcium phosphate is 60-80 μm.

In order to further improve the technical effect of the present invention, in this embodiment, the outer piston 5 is made of rubber material, and the longitudinal section of the outer piston 5 has a shape that is wide at the bottom and narrow at the top, where the bottom refers to the direction toward the first outlet 7 and the top refers to the direction toward the enlarged portion. The contact surface between the sealing ring and the wall of the inner and outer cylinder bodies is small, and the mutual frictional resistance is correspondingly small. The upper and lower surfaces of the outer piston 5 are each provided with dimples extending in the circumferential direction.

The rubber material comprises the following components in parts by weight: 65-75 parts of methyl silicone rubber, 60-70 parts of polylactide, 20-30 parts of polyisobutylene, 15-20 parts of precipitated silica, 12-15 parts of 2, 3-propylene oxide methacrylate, 8-10 parts of dicumyl peroxide, 3-5 parts of N-phenyl-alpha-aniline and 1-5 parts of hydroxyl terminated polysiloxane. The rubber material is prepared by the following steps:

(1) uniformly mixing the methyl silicone rubber, the polylactide, the precipitated silica and the hydroxyl-terminated polysiloxane in a mixing roll at the temperature of 160-170 ℃;

(2) then adding dicumyl peroxide, and carrying out double-roll mixing at normal temperature to prepare a first mixture;

(3) polyisobutylene, 2, 3-epoxypropane methacrylate and N-phenyl-alpha-aniline are uniformly mixed under high-speed shearing to prepare a second mixture;

(4) and simultaneously adding the first mixture and the second mixture into a double-screw extruder, and extruding and granulating by the double-screw extruder to obtain the rubber material.

The rubber material prepared by the embodiment has the characteristics of high mechanical strength, excellent impact property and the like, and has better compatibility and product performance. The rubber material has good elasticity, low hardness and fatigue resistance.

The outer piston 5 made of the rubber material has the smallest contact surface with the walls of the outer cylinder 1 and the inner cylinder 2 in a static state, when the outer piston rod is pulled to suck hemostatic, negative pressure is generated in the space between the outer cylinder 1 and the cylinder of the inner cylinder 2 to suck the outer piston 5 to move downwards, the outer piston 5 expands, the contact surface with the walls of the outer cylinder 1 and the inner cylinder 2 is enlarged, the sealing performance is enhanced, and the propeller cannot leak due to the change of pressure in the space. As the negative pressure becomes smaller, the outer piston 5 rebounds, and the surface of contact with the walls of the outer cylinder 1 and the inner cylinder 2 decreases, so that the frictional resistance decreases. When the outer piston rod is pushed to inject the hemostatic, the dent of the outer piston 5 is squeezed open by the extrusion of air in the space, the outer piston 5 expands, the contact surface of the outer piston 5 with the wall of the outer cylinder 1 and the wall of the inner cylinder 2 is increased, the sealing performance is enhanced, the outer piston 5 rebounds along with the reduction of the air pressure in the space, and the contact surface of the outer piston 5 with the wall of the outer cylinder 1 and the wall of the inner cylinder 2 is reduced, so the frictional resistance is reduced. The contact surface of the outer piston 5 and the walls of the outer cylinder 1 and the inner cylinder 2 is small, the contact surface can be changed along with the change of air pressure in the space, the sensitivity is high, the sealing and the leakage prevention of the outer piston 5 and the walls of the outer cylinder 1 and the inner cylinder 2 are ensured, and the friction resistance generated between the outer piston 5 and the walls of the outer cylinder 1 and the inner cylinder 2 due to extrusion is reduced, so that the purposes of low resistance and strong sealing are achieved, and the higher efficiency of the propeller in the process of injecting the hemostatic agent is further ensured.

The performance of the rubber material was tested. The tensile test is in accordance with GB/T1040-2006 standard, the impact test is in accordance with GB/T1843-2008 standard and the tear test is in accordance with GB/T529 standard.

Wherein the elongation at break (%) is 115-120, and the impact strength (kj/m)²)40-50, and the tearing strength/MPa 55-60. Compared with similar products in the market, the elongation at break, the impact strength and the tear strength are improved by 65-68 percent. The elastic rubber has good elasticity, and the elastic elongation can reach 1000%.

Example 3

Referring to fig. 1-3, a high-efficiency hemostatic pusher comprises an outer cylinder 1, an inner cylinder 2, a pusher tube 3, an adjusting connector 4, an outer piston 5 and an inner piston 6, wherein the outer cylinder 1 and the inner cylinder 2 are coaxially arranged, the inner cylinder 2 is arranged in the outer cylinder 1, a space is left between the cylinders of the outer cylinder 1 and the inner cylinder 2, the outer piston 5 is arranged in the space, and the inner piston 6 is arranged in the inner cylinder 2; the front end of the outer cylinder 1 is provided with a first outlet 7 which is conically tapered into a thin cylinder, the front end of the inner cylinder 2 is provided with a second outlet 8 which is conically tapered into a thin cylinder, the first outlet 7 and the second outlet 8 are coaxially arranged, and the second outlet 8 is arranged in the first outlet 7; the front end of the inner cylinder 2 is provided with a plurality of supporting bodies 9 which are uniformly arranged along the radial direction, and the supporting bodies 9 are arranged in the space and support and fix the mutual positions of the outer cylinder 1 and the inner cylinder 2;

the propulsion pipe 3 is connected with the first outlet 7 through an adjusting connecting piece 4, the adjusting connecting piece 4 comprises a main body, a central liquid outlet 10 is arranged in the center of the main body, and a plurality of circumferential liquid outlets 11 are uniformly distributed on the circumference of the end surface of the main body; the rear end of the main body is connected with a fixed ring, a first adjusting ring 12 and a second rotating adjusting ring 13 are arranged between the rear end of the main body and the fixed ring, an adjusting rod 14 is arranged on the first adjusting ring 12, the adjusting rod 14 is connected with a connecting rod 15 inside the first rotating adjusting ring 12 through an elastic buckling device, and a first blocking piece 16 matched with the shape and size of the second outlet 8 is arranged at the free end of the connecting rod 15; a plurality of second baffles 17 which are uniformly arranged at intervals are arranged inside the second rotary adjusting ring 13, and the plurality of second baffles 17 are respectively matched with the shapes and sizes of the plurality of circumferential liquid outlets 11; the other end of the fixed ring is fixedly arranged on the base, and the base is connected with the first outlet 7;

the propelling pipe 3 is prepared from medical PE and medical polyamide, wherein the weight percentages of the two are as follows: 78-65% of medical PE55 and 35-45% of medical polyamide; the preparation method comprises the steps of fully mixing the two materials in a reaction kettle, heating to the temperature of 260-280 ℃, keeping for 2-3h to enable the materials to reach a molten state, putting the materials into an extruder, pushing the mixture of the two materials into an extrusion die head through a screw in the extruder, performing melt extrusion, performing vacuum cooling setting and drying at the temperature of 32-35 ℃ after molding, drawing out a molded PE pipe material by a drawing-out machine, and cutting the PE pipe material into required lengths to obtain a finished product of the push pipe 3.

The outer piston 5 is connected with a hollow tubular outer piston rod, the inner piston 6 is connected with a cylindrical inner piston rod, the outer piston rod is arranged in the space, and the inner piston rod can be inserted and slide in the outer piston rod; the rear ends of the inner and outer piston rods present an enlargement, respectively, allowing to manually move the inner and outer piston rods.

The propelling pipe 3 is connected with the adjusting connecting piece 4 through a pipe end connector, the propelling pipe 3 is fixed on the pipe end connector, and the other end of the pipe end connector is connected with the front end of the main body of the adjusting connecting piece 4 through threads.

The main body of the adjusting connecting piece 4, the first adjusting ring 12, the second rotating adjusting ring 13 and the fixed ring are axially positioned through positioning rings; the fixing ring and the base are sealed through the sealing ring, and the sealing ring is sleeved outside the main body and used for sealing connection between the pipe end connector and the adjusting connecting piece 4.

The medical PE comprises the following components in parts by weight: high molecular weight PE30-40 parts, basic calcium phosphate 30-35 parts, carboxymethyl chitosan 20-30 parts and 1, 2-ethylene glycol 40-50 parts; mixing high molecular weight PE, basic calcium phosphate, carboxymethyl chitosan and 1, 2-ethylene glycol, and hot-pressing to form; the mixing temperature is 92-96 ℃, the mixing time is 33-35min, the hot press molding temperature is 120-130 ℃, the hot press molding time is 5-8h, and the hot press molding pressure is 8-10 KN.

When the propulsion pipe 3 is prepared, the surface treatment is carried out after cooling, shaping and drying, and the method comprises the following steps: activating by UV irradiation for 5-10min, adding the propulsion tube 3 into the silver-loaded nano titanium dioxide disinfectant, simultaneously performing UV irradiation for 10-15min, finally cleaning the propulsion tube 3 with ultrapure water for 3-5 times, and drying.

The disinfectant of the silver-loaded nano titanium dioxide comprises: adding the silver-loaded nano titanium dioxide antibacterial agent into a mixed solution of ultrapure water and dimethyl methanol in a weight ratio of 1:5:2, magnetically stirring for 10-15min, adding vinyl triethoxy siloxane accounting for 15-20% of the mixed solution in mass and methacrylate accounting for 10-15% of the mixed solution in mass, and initiating by using 2,2' -azobis (2-methyl propionitrile).

The shape of the enlarged part is circular, rectangular or elliptical; the particle size of the basic calcium phosphate is 60-80 μm.

In order to further improve the technical effect of the invention, in this embodiment, the cylinders of the outer cylinder 1 and the inner cylinder 2 are made of the following raw materials in parts by weight: 50-60 parts of polypropylene, 45-50 parts of propylene-butylene random copolymer, 50-55 parts of silicon dioxide, 8-10 parts of aluminum oxide, 15-20 parts of boric anhydride, 1-1.5 parts of sorbitol and 1-1.5 parts of N-phenyl-alpha-aniline.

Wherein the propylene-butene random copolymer has a comonomer content of 3-3.5%, an MFR of 10-30g/10min, and a haze of 3-5% for a 1mm sample. The raw materials are weighed, stirred and mixed, extruded and granulated by a double screw and molded to obtain the composite material.

And testing the performance of the cylinder. The performance test method comprises the following steps: the impact strength of the notch of the simply supported beam is tested according to GB/T1043.1-2008; the flexural modulus was carried out according to GB/T9341-; rockwell hardness was performed according to GB/T3398.2-2008; haze was performed according to GB/T2410-; the separation force was performed according to GB/T1962-2001.

The cylinder body has high rigidity and toughness balance transparency, and can meet medical standard requirements. Because of higher rigidity and toughness balance and transparency, the quality and durability of the product are improved. The formula and the preparation method of the invention ensure that the product has high chemical stability, thermal stability and mechanical strength, and ensure high efficiency when being used as a propeller. The used raw materials do not contain heavy metal components and toxic substances, thereby ensuring the safety and sanitation requirements of the product.

In addition, in order to ensure the technical effect of the invention, the technical schemes of the above embodiments can be reasonably combined.

According to the embodiment, the cavity type hemostatic injection device is mainly used for cavity type bleeding wounds, different types and volumes of hemostatic agents can be injected according to requirements, and the hemostatic agents can be conveyed to a wound bleeding point to seal the bleeding point.

The invention can select different types of hemostats to be filled into the outer cylinder or the inner cylinder, so that a proper hemostat is selected to be injected into a bleeding point for hemostasis according to different requirements, and the hemostats of different types can be independently injected or mixed when passing through an adjusting connector before injection; the hemostatic agents of the same type can be selected to be filled into the outer barrel and the inner barrel, so that the hemostatic agents with proper volume can be selected according to the amount of the required bleeding, and the invention is more convenient and efficient.

The propelling pipe used by the invention can solve the problems of low hardness, poor rigidity and the like of single-component materials, has good biocompatibility, higher pipe hardness and better rigidity, and is antibacterial, safe and reliable. The propelling pipe also has the advantages of high flexibility, strong wear resistance and long service life, and can efficiently inject the hemostatic agent into bleeding points to promote wound healing and hemostasis.

The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.