阅读说明：本技术 预装式笔式ici注射装置及操作方法 (Pre-assembled pen type ICI injection device and operation method ) 是由 潘峰 于 2019-11-04 设计创作，主要内容包括：预装式笔式ICI注射装置及操作方法,装置包括针筒和推杆,针筒内腔呈阶梯状、包括同轴的活塞腔和推杆腔,活塞腔端部壁上设置圆柱形药物出口,药物出口靠活塞腔一侧设置封膜密封；推杆腔内设置推杆,推杆两头分别固定活塞和推盘,活塞与活塞腔内壁无间隙滑动配合连接,推杆与推杆腔内壁滑动配合连接,推盘和针筒尾部端面之间设置环绕推杆外壁的拉力弹簧,拉力弹簧两头分别固定在推盘内端面和针筒尾部端面上,拉力弹簧外围设置限位环,限位环沿厚度方向设置一开口；推盘尾端设置凹槽,凹槽底部设置一孔洞；活塞位于活塞腔尾部且活塞腔内预装ICI药液。本发明可解决目前ICI药物注射操作复杂、现有笔式注射器结构复杂、成本高的技术问题。(The device comprises a needle cylinder and a push rod, wherein the inner cavity of the needle cylinder is in a step shape and comprises a piston cavity and a push rod cavity which are coaxial, a cylindrical medicine outlet is arranged on the wall of the end part of the piston cavity, and a sealing film is arranged on one side of the medicine outlet close to the piston cavity for sealing; a push rod is arranged in the push rod cavity, a piston and a push disc are respectively fixed at two ends of the push rod, the piston is in gapless sliding fit connection with the inner wall of the piston cavity, the push rod is in sliding fit connection with the inner wall of the push rod cavity, a tension spring surrounding the outer wall of the push rod is arranged between the push disc and the tail end face of the needle cylinder, two ends of the tension spring are respectively fixed on the inner end face of the push disc and the tail end face of the needle cylinder, a limiting ring is arranged on the periphery of the tension spring, and an; the tail end of the push disc is provided with a groove, and the bottom of the groove is provided with a hole; the piston is positioned at the tail part of the piston cavity and internally filled with ICI liquid medicine. The invention can solve the technical problems of complex operation of the current ICI medicament injection, complex structure and high cost of the existing pen-type injector.)

1. A pre-filled pen-type ICI injection device comprising a barrel (1) and a ram (2) characterized in that,

the inner cavity of the needle cylinder (1) is stepped and comprises a piston cavity (11) and a push rod cavity (12) which are coaxial, the inner diameter of the piston cavity (11) is larger than that of the push rod cavity (12), a cylindrical medicine outlet (13) is formed in the end wall of the piston cavity (11), and a sealing film (14) is arranged on one side, close to the piston cavity (11), of the medicine outlet (13) for sealing;

a push rod (2) is arranged in the push rod cavity (12), a piston (21) and a push disc (22) are respectively fixed at two ends of the push rod (2), the piston (21) is in gapless sliding fit connection with the inner wall of the piston cavity (11), the push rod (2) is in sliding fit connection with the inner wall of the push rod cavity (12), a tension spring (3) surrounding the outer wall of the push rod (2) is arranged between the push disc (22) and the tail end face of the needle cylinder (1), two ends of the tension spring (3) are respectively fixed on the inner end face of the push disc (22) and the tail end face of the needle cylinder (1), a limiting ring (4) is arranged on the periphery of the tension spring (3), two ends of the limiting ring (4) are respectively clamped on the inner end face of the push disc (22) and the tail end face of the needle cylinder (1), and an opening (41) is formed in the limiting; a groove (23) is formed in the tail end of the push disc (22), and a hole (24) which is used for accommodating the needle head (5) and extends into the push rod (2) is formed in the bottom of the groove (23); the piston (21) is positioned at the tail part of the piston cavity (11) and ICI liquid medicine is pre-filled in the piston cavity (11).

2. A pre-filled pen ICI injection device according to claim 1 where the needle (5) is bottomed with a cylindrical needle holder (51) and where the outer wall of the needle holder (51) is a tight fit or threaded connection with the recess (23).

3. A pre-filled pen ICI injection device according to claim 2 where the outer wall of the needle holder (51) is a tight fit or a threaded connection with the inner wall of the drug outlet (13).

4. A pre-filled pen ICI injection device according to claim 2 wherein the needle holder (51) has a height greater than the depth of the recess (23) and less than the length of the drug outlet (13).

5. The pre-filled pen ICI injection device according to claim 1 wherein the push disc (22) is hemispherical and comprises a curved outer wall and a planar wall perpendicularly connected to the push rod (2).

6. The pre-filled pen-type ICI injection device according to claim 1, wherein the push disc (22) is of rubber material.

7. Method of operating a pre-filled pen-type ICI injection device according to any of claims 1-6, comprising the steps of:

1) installing a needle (5): taking the needle holder (51) and the needle head (5) out of the groove (23), piercing the sealing film (14) by the needle head (5), turning over the needle head (5) to enable the needle head (5) to be arranged outwards, installing the needle holder (51) in the medicine outlet (13) and enabling the end face of the needle holder (51) not to protrude out of the end face of the needle cylinder (1);

2) and (3) injection: the penis is fixed by one hand, and the needle (5) is inserted into the proper position of the cavernous body by the other hand; after the puncture, the limiting ring (4) is taken down, and the pull spring (3) pulls the push disc (22) to drive the push rod (2) and the piston (21) to realize automatic injection;

3) narrowing: and after the injection is finished, the needle head (5) is taken down, the needle holder (51) is placed in the groove (23), and the needle head (5) is positioned in the hole (24).

Technical Field

The invention belongs to the field of medical auxiliary instruments, and particularly relates to a pre-installed pen type ICI injection device and an operation method.

Background

The penis erection is induced by injecting vasoactive drug (ICI) into corpus cavernosum penis, and can be used for treating male erectile difficulty. Examples of the vasoactive drugs include prostaglandin E1. ICI has the advantages that: simple operation, small interference from the outside, good result repeatability, rapid result output and the like.

Operating method for injecting ICI: the patient lies down, the root of the penis is banded with a rubber band, and the operation is carried out under the strict aseptic principle after the sterilization. The injection sites are generally on both sides of the mid-posterior portion of the penis, and should avoid the neurovascular bundle and the urethra. After the skin of the injection part is fixed by fingers, the needle head vertically penetrates into the cavernous body of the penis, when the white membrane is punctured, the medicine is slowly injected into the cavernous body without drawing back blood, after the injection is finished, the needle head is pulled out, the cotton swab is used for pressing the injection part for 2 minutes to prevent the occurrence of bleeding and hematoma, after 3 minutes, the rubber band is loosened, and the penis is stimulated by hands to erect.

For patients, the initial injection typically needs to be performed at the hospital under the direction of a physician. The subsequent operation is then performed by the patient himself. Due to the particularities of the application of the medicament, patients are required to inject themselves prior to sexual life. The operation method can be known that in the using process, one hand needs to fix the penis, so that the injection can be completed only by the other hand, and how to use the one hand for injection and make the injection more convenient becomes a problem to be solved.

Insulin pens are complex in structure and high in price, and are currently mainly imported, such as insulin pens developed by austria research institute. The invention patent of the domestic patent number 'CN 105148357A' provides an anti-hardening insulin pen, however, the pen uses a plurality of sensors, a single chip microcomputer and other elements, and still has the problems of high cost and complex structure. ICI drugs are expensive, and the burden of patients is increased by using expensive insulin pens; and some insulin pens have needles that are not disposable, which poses serious health and safety problems if used to inject the penis.

Disclosure of Invention

The invention aims to provide a pre-assembled pen type ICI injection device and an operation method, and solves the technical problems of complex injection operation of the ICI medicine, complex structure and high cost of the existing pen type injector.

The technical scheme of the invention is as follows:

a pre-filled pen type ICI injection device comprises a syringe and a push rod,

the inner cavity of the needle cylinder is in a step shape and comprises a piston cavity and a push rod cavity which are coaxial, the inner diameter of the piston cavity is larger than that of the push rod cavity, a cylindrical medicine outlet is formed in the end wall of the piston cavity, and a sealing film is arranged on one side, close to the piston cavity, of the medicine outlet for sealing;

the push rod cavity is internally provided with a push rod, two ends of the push rod are respectively fixed with a piston and a push disc, the piston is in gapless sliding fit connection with the inner wall of the piston cavity, the push rod is in sliding fit connection with the inner wall of the push rod cavity, a tension spring surrounding the outer wall of the push rod is arranged between the push disc and the tail end face of the needle cylinder, two ends of the tension spring are respectively fixed on the inner end face of the push disc and the tail end face of the needle cylinder, the periphery of the tension spring is provided with a limit ring, two ends of the limit ring are respectively clamped on the inner end face of the push disc and the tail end face of the needle cylinder; the tail end of the push disc is provided with a groove, and the bottom of the groove is provided with a hole which is used for accommodating a needle head and extends into the push rod; the piston is positioned at the tail part of the piston cavity, and ICI liquid medicine is pre-filled in the piston cavity.

Preferably, the root of the needle head is a cylindrical needle holder, and the outer wall of the needle holder is in tight fit with the groove or in threaded connection with the groove.

Preferably, the outer wall of the needle holder is tightly matched with or in threaded connection with the inner wall of the medicine outlet.

Preferably, the needle holder height is greater than the groove depth and less than the medicament outlet length.

Preferably, the push disc is hemispherical and comprises a curved outer wall and a plane wall vertically connected with the push rod.

Preferably, the pushing disc is made of rubber.

A method of operating a pre-filled pen type ICI injection device comprising the steps of:

1) installing a needle head: taking down the needle holder and the needle head from the groove, piercing the sealing film by the needle head, turning over the needle head to enable the needle head to be arranged outwards, installing the needle holder in the medicine outlet and enabling the end face of the needle holder not to protrude out of the end face of the needle cylinder;

2) and (3) injection: fixing the penis with one hand and puncturing the needle into the proper position of the cavernous body with the other hand; after the puncture, the limiting ring is taken down, and the pull spring pulls the push disc to drive the push rod and the piston to realize automatic injection;

3) narrowing: and after the injection is finished, the needle head is taken down, the needle support is placed in the groove, and the needle head is positioned in the hole.

The invention has the advantages and positive effects that:

(1) the injection can be carried out by using one hand, the liquid medicine is pre-filled, the operation steps are simple and convenient, and the injection is suitable for the independent operation of a patient;

(2) the height of the needle holder is larger than that of the groove so as to facilitate the extraction of the needle head from the groove, and the length of the needle holder is smaller than that of the medicine outlet so as to ensure that the needle holder is buried in the needle cylinder, the front end of the needle cylinder is a plane, and the end surface can be attached to the skin during injection.

(3) The curved surface of the pushing plate is pressed against the palm center when the injection is carried out by one hand, the material is more comfortable, and the hand is not easy to be injured.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a needle mounted state of the method of operation of the present invention;

FIG. 3 is a schematic view of the state of the lower limit ring in the operation method of the present invention;

FIG. 4 is a schematic view of a stop collar according to the present invention;

FIG. 5 is a cross-sectional schematic view of FIG. 1;

FIG. 6 is a cross-sectional schematic view of FIG. 2;

FIG. 7 is a cross-sectional schematic view of FIG. 3;

FIG. 8 is a schematic view of the internal structure of the injection half;

FIG. 9 is a schematic view of the injected interior structure;

fig. 10 is a schematic view of the internal structure during narrowing.

The reference numbers: 1-syringe, 11-piston cavity, 12-push rod cavity, 13-medicine outlet, 14-sealing membrane, 2-push rod, 21-piston, 22-push disk, 23-groove, 24-hole, 3-tension spring, 4-spacing ring, 41-opening, 5-needle head and 51-needle holder.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

Referring to fig. 1-10, a pre-filled pen-type ICI injection device, comprising a barrel 1 and a ram 2,

referring to fig. 4, the inner cavity of the syringe 1 is stepped and comprises a piston cavity 11 and a push rod cavity 12 which are coaxial, the inner diameter of the piston cavity 11 is larger than that of the push rod cavity 12, a cylindrical medicine outlet 13 is arranged on the end wall of the piston cavity 11, and a sealing film 14 is arranged on one side of the medicine outlet 13 close to the piston cavity 11 for sealing;

a push rod 2 is arranged in the push rod cavity 12, a piston 21 and a push disc 22 are respectively fixed at two ends of the push rod 2, the piston 21 is in gapless sliding fit connection with the inner wall of the piston cavity 11, the push rod 2 is in sliding fit connection with the inner wall of the push rod cavity 12, a tension spring 3 surrounding the outer wall of the push rod 2 is arranged between the push disc 22 and the tail end face of the needle cylinder 1, two ends of the tension spring 3 are respectively fixed on the inner end face of the push disc 22 and the tail end face of the needle cylinder 1, a limiting ring 4 is arranged on the periphery of the tension spring 3, two ends of the limiting ring 4 are respectively clamped on the inner end face of the push disc 22 and the tail end face of the needle cylinder 1, and an opening 41; the tail end of the push disc 22 is provided with a groove 23, and the bottom of the groove 23 is provided with a hole 24 which is used for accommodating the needle 5 and extends into the push rod 2; the piston 21 is located at the tail of the piston cavity 11, and ICI liquid medicine is filled in the piston cavity 11. The pull spring can ensure that the push disc is pulled after the limit ring is taken down, so that the medicine is slowly and automatically pushed into the penis, and if the medicine is not automatically pushed, the push disc is lightly pressed by a palm to assist injection.

Further, the root of the needle head 5 is a cylindrical needle holder 51, and the outer wall of the needle holder 51 is tightly matched with or in threaded connection with the groove 23.

Further, referring to fig. 5, the outer wall of the needle holder 51 is tightly fitted or screwed with the inner wall of the medicine outlet 13.

Further, the needle holder 51 has a height greater than the depth of the groove 23 and less than the length of the drug outlet 13. The height of the needle holder 51 is larger than that of the groove 23 so as to facilitate the extraction of the needle from the groove 23, and the length of the needle holder 51 is smaller than that of the medicine outlet 13 so as to ensure that the needle holder 52 is buried in the syringe, and the front end of the syringe is a plane which can be attached to the skin during injection.

Further, the pushing plate 22 is a hemisphere, and includes a curved outer wall and a planar wall vertically connected to the pushing rod 2.

Further, the pushing plate 22 is made of rubber. When the injection is carried out by one hand, the curved surface of the push plate 22 is pressed against the palm center, the material is more comfortable, and the hand is not easy to be hurt.

A method of operating a pre-filled pen type ICI injection device comprising the steps of:

1) installing a needle head 5: removing the needle holder 51 and the needle 5 from the groove 23, piercing the sealing membrane 14 by the needle 5, turning over the needle 5 to enable the needle 5 to be arranged outwards, and installing the needle holder 51 in the medicine outlet 13 without the end face of the needle holder 51 protruding out of the end face of the needle cylinder 1;

2) and (3) injection: fixing the penis with one hand and puncturing the needle 5 into the proper position of the cavernous body with the other hand; after the puncture, the limiting ring 4 is taken down, and the pull spring 3 pulls the push disc 22 to drive the push rod 2 and the piston 21 to realize automatic injection;

3) narrowing: after the injection is completed, the needle 5 is removed, the needle holder 51 is placed in the recess 23 and the needle 5 is positioned in the hole 24.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.