阅读说明：本技术 一种颈动脉血流体外控制装置 (External control device for carotid blood fluid ) 是由 张文生 于 2021-08-06 设计创作，主要内容包括：本发明公开了一种颈动脉血流体外控制装置,包括装置外壳,所述装置外壳成型为左右贯通的空心壳体状,所述装置外壳前端开口并可拆卸设有前挡止板；夹持装置,用以夹持患者颈动脉；快调装置,用以快速调节夹持装置姿态；精调装置,用以精准调节夹持装置姿态。所述装置外壳内腔前半部分沿纵向设有前置滑板,所述装置外壳内腔后半部分沿纵向设置有后置滑板,所述前置滑板后端面中部向后成型有后连接板,所述后连接板后端成型有齿轮芯轴,所述齿轮芯轴与后置滑板垂直连接。所述夹持装置包括下移夹具、上移夹具；所述快调装置包括中央齿轮、下推组件、上推组件；所述精调装置包括：丝杠组件、传动壳体、锥齿驱动机构、蜗轮驱动机构。(The invention discloses an external control device for carotid blood fluid, which comprises a device shell, wherein the device shell is formed into a hollow shell body which is communicated from left to right, and the front end of the device shell is opened and is detachably provided with a front stop plate; a clamping device for clamping a patient's carotid artery; the quick adjusting device is used for quickly adjusting the posture of the clamping device; and the fine adjustment device is used for accurately adjusting the posture of the clamping device. The device shell cavity front half is equipped with leading slide along vertically, device shell cavity rear half is along vertically being provided with rearmounted slide, the shaping backward in leading slide rear end face middle part has the back connecting plate, the shaping of back connecting plate rear end has the gear dabber, the gear dabber is connected with rearmounted slide is perpendicular. The clamping device comprises a downward moving clamp and an upward moving clamp; the quick adjusting device comprises a central gear, a lower pushing assembly and an upper pushing assembly; the fine adjustment device includes: the device comprises a screw rod assembly, a transmission shell, a bevel gear driving mechanism and a worm wheel driving mechanism.)

1. An external carotid blood flow control device, characterized in that:

the device comprises a device shell (1) which is embedded in a patient body and sleeved on a carotid artery (a), wherein the device shell (1) is formed into a hollow shell body which is communicated from left to right, and the front end of the device shell (1) is opened and is detachably provided with a front stop plate (15);

a clamping device (2) for clamping a patient's carotid artery (a); (ii) a

The quick adjusting device (3) is used for quickly adjusting the posture of the clamping device (2);

and the fine adjustment device (4) is used for accurately adjusting the posture of the clamping device (2).

2. The extracorporeal carotid blood control device of claim 1, wherein:

the device shell (1) inner chamber front half is equipped with leading slide (11) along vertically, device shell (1) inner chamber rear half is provided with rearmounted slide (12) along vertically, leading slide (11) rear end face middle part backward the shaping has back connecting plate (13), back connecting plate (13) rear end shaping has gear dabber (14), gear dabber (14) are connected with rearmounted slide (12) is perpendicular.

3. The extracorporeal carotid blood control device of claim 2, wherein:

the upper side and the lower side of the rear end of the front baffle plate (15) are respectively provided with a clamping sliding plate (15 a); the device shell (1) is provided with a connecting buckle (16) at the upper end and the lower end respectively for fixing a corresponding clamping sliding plate (15a), and the connecting buckle (16) comprises:

an insertion substrate (16a) provided inside the upper end surface or the lower end surface of the device case (1);

a connection slot (16b) provided in the insertion substrate (16a) in the front-rear direction;

and clamping bolts (16c) screwed on the outer sides of the corresponding insertion base plates (16a) and fixing the corresponding clamping sliding plates (15 a).

4. The extracorporeal carotid blood control device of claim 3, wherein:

the clamping device (2) comprises a downward moving clamp (21) and an upward moving clamp (22);

the downward moving clamp (21) comprises a downward moving sliding sleeve (21a) which is slidably sleeved on the lower half part of the front sliding plate (11), a downward moving push plate (21b) which is arranged at the rear part of the lower end of the downward moving sliding sleeve (21a), a downward moving sleeve hole (21c) which is formed on the downward moving push plate (21b) and is sleeved with the rear sliding plate (12), a downward moving front plate (21d) which is formed above the front end of the downward moving sliding sleeve (21a), and a downward moving clamping plate (21e) which is formed in front of the upper end of the downward moving front plate (21 d);

the upper moving clamp (22) comprises an upper moving sliding sleeve (22a) which is slidably sleeved on the upper half part of the front sliding plate (11), an upper moving push plate (22b) which is arranged at the rear part of the upper end of the upper moving sliding sleeve (22a), an upper moving jack (22c) which is formed on the upper moving push plate (22b) and is sleeved with the rear sliding plate (12), a lower plug board (22d) which is formed below the front end of the upper moving sliding sleeve (22a) and passes through the lower moving plug board (21e), and an upper moving plug board (22e) which is formed in front of the lower end of the lower plug board (22 d);

the quick adjustment device (3) comprises:

the central gear (31) is rotatably arranged on the gear mandrel (14) and is positioned between the rear connecting plate (13) and the rear sliding plate (12);

the downward pushing assembly (32) comprises a downward shaft body (32a) arranged on the right side of the upper end face of the device shell (1) and penetrating through the upward moving push plate (22b), and a downward rack (32b) which is sleeved on the downward shaft body (32a) in a sliding manner and is in transmission connection with the central gear (31);

the upward pushing assembly (33) comprises an upward shaft body (33a) which is arranged on the left side of the lower end face of the device shell (1) and penetrates through the downward moving push plate (21b), an upward rack (33b) which is sleeved on the upward shaft body (33a) in a sliding way and is in transmission connection with the central gear (31), and a small-diameter pull rod (33c) which is formed at the upper end of the upward rack (33b) and penetrates through the upward moving push plate (22b) and the upper end face of the device shell (1);

the fine adjustment device (4) comprises:

the screw rod assembly (41) comprises a positive and negative screw thread pipe (41a) which longitudinally penetrates through the rear connecting plate (13), a lower limiting ring (41b) which is formed on the outer wall of the positive and negative screw thread pipe (41a) and is positioned below the rear connecting plate (13), an upper limiting ring (41c) which is formed on the outer wall of the positive and negative screw thread pipe (41a) and is positioned above the rear connecting plate (13), driven locking teeth (41d) which are uniformly distributed on the upper end surface of the upper limiting ring (41c) in the circumferential direction, and a second bevel gear (41e) which is formed on the upper end of the outer wall of the positive and negative screw thread pipe (41a), wherein inner threads with opposite rotation directions are formed at the upper end and the lower end of the inner cavity of the positive and negative screw thread pipe (41a), and an upper threaded rod (41f) and a lower threaded rod (41g) are respectively arranged at the upper end and the lower end of the positive and negative screw thread pipe (41 a);

the transmission shell (42) comprises a hollow rectangular shell body (42a), a transmission lower hole (42b) formed on the right side of the lower end face of the shell body (42a), a deflector rod through hole (42c) formed on the left side of the upper end face of the shell body (42a), and a solenoid through hole (42d) formed on the right side of the upper end face of the shell body (42 a);

the bevel gear driving mechanism (43) comprises a gear mandrel (43a) arranged on the left side of the lower end face of the shell body (42a), a driving gear (43b) rotatably arranged on the gear mandrel (43a), a first bevel gear (43c) formed at the upper end of the driving gear (43b) and in transmission fit with the second bevel gear (41e), and a rotating shift lever (43d) formed at the upper end of the first bevel gear (43c), wherein the upper end of the rotating shift lever (43d) penetrates through a shift lever through hole (42c) and the upper end face of the device shell (1);

the worm wheel driving mechanism (44) comprises a driven gear (44a) which is rotatably arranged on the left side of the upper end face of a shell body (42a) and is in transmission connection with a driving gear (43b), a third bevel gear (44b) which is formed on the lower end face of the driven gear (44a), a fourth bevel gear (44c) which is formed on the left side of the rear end face of the shell body (42a) and is in transmission connection with the third bevel gear (44b), a driving worm (44d) which is formed on the front end face of the fourth bevel gear (44c), a driven worm wheel (44e) which is rotatably arranged in a transmission lower hole (42b) and is sleeved on a positive and negative screw thread pipe (41a), driving locking teeth (44f) which are circumferentially and uniformly distributed on the lower end face of the driven worm wheel (44e) and are in locking fit with the driven locking teeth (41d), and a reset compression spring (44g) which is wound on the positive and negative screw thread pipe (41a), wherein the reset compression spring (44g) is positioned between the driven worm wheel (44e) and an upper limiting ring (41c), the driving worm (44d) is in transmission connection with the driven worm wheel (44 e).

5. The extracorporeal carotid blood control device of claim 4, wherein: a circle of worm wheel concave ring is formed on the outer wall of the driven worm wheel (44e), and the worm wheel concave ring is in rotating fit with the transmission lower hole (42b) so as to limit the axial movement of the driven worm wheel (44 e).

6. The extracorporeal carotid blood control device of claim 5, wherein: the driven gear (44a) is rotatably arranged on a driven gear shaft, and the driven gear shaft is fixedly arranged on the upper end surface of the shell body (42 a).

7. The extracorporeal carotid blood control device of claim 6, wherein: the lower end of the driven gear shaft is expanded and formed with a cylindrical gear shaft end, and the inner wall of the driven gear (44a) is provided with a gear shaft cavity matched with the gear shaft end.

8. The extracorporeal carotid blood control device of claim 7, wherein: the fourth bevel gear (44c) and the driving worm (44d) are rotatably arranged on a worm mandrel, one end of the worm mandrel is connected with the front end of the shell body (42a), and the other end of the worm mandrel is connected with the rear end of the shell body (42 a).

9. The extracorporeal carotid blood control device of claim 8, wherein: the inner diameter of the screw through hole (42d) is larger than the outer diameter of the bottom of the second bevel gear (41e) so that the second bevel gear (41e) can slide through the screw through hole (42 d).

Technical Field

The application relates to the technical field of medical instruments, in particular to an external carotid blood fluid control device.

Background

Intracranial blood flow is supplied primarily by the four major vessels of the carotid and vertebral arteries. Along with the improvement of living standard and the increase of age of people, carotid plaque is more and more, so that the incidence rate of carotid plaque stenotic stroke is linearly increased, an effective method for treating carotid stenosis is carotid intimal denudation, the occurrence of cerebral blood flow transitional perfusion after operation is a main factor causing life risk of patients, and the blood flow of the blood vessel after effective control and opening can obviously avoid transitional perfusion, so that the life of the patients is saved, and the prognosis is improved. The existing carotid blood flow control is inconvenient for in vitro operation.

The invention mainly solves the technical problems in the prior art, and provides a device which can control carotid blood flow from the outside of a body after a blood flow control device is placed, provides a gradual adaptation process for brain tissues and blood vessels, and is free from the influence of time and the worry of incision infection.

Disclosure of Invention

Aiming at the situation of the prior art, the technical scheme adopted by the invention is as follows:

an external carotid blood flow control device:

the device shell is embedded in a patient body and sleeved on a carotid artery, the device shell is formed into a hollow shell body which is communicated from left to right, and the front end of the device shell is opened and is detachably provided with a front stop plate. The device shell cavity front half is equipped with leading slide along vertically, device shell cavity rear half is along vertically being provided with rearmounted slide, the shaping backward in leading slide rear end face middle part has the back connecting plate, the shaping of back connecting plate rear end has the gear dabber, the gear dabber is connected with rearmounted slide is perpendicular.

The upper side and the lower side of the rear end of the front baffle are respectively provided with a clamping sliding plate; the device shell is equipped with respectively from top to bottom and is used for the fixed connection buckle that corresponds the centre gripping slide, connection buckle includes:

the plug-in substrate is arranged on the inner side of the upper end surface or the lower end surface of the device shell;

the connecting slot is arranged in the inserting substrate along the front-back direction;

and the clamping bolt is screwed on the outer side of the corresponding plug-in substrate and fixes the corresponding clamping sliding plate.

The clamping device is used for clamping the carotid artery of the patient.

The clamping device comprises a downward moving clamp and an upward moving clamp;

the downward moving clamp comprises a downward moving sliding sleeve which is slidably sleeved on the lower half part of the front sliding plate, a downward moving push plate which is arranged at the rear part of the lower end of the downward moving sliding sleeve, a downward moving sleeve hole which is formed on the downward moving push plate and is sleeved with the rear sliding plate, a downward moving front plate which is formed above the front end of the downward moving sliding sleeve, and a downward moving clamping plate which is formed in front of the upper end of the downward moving front plate;

the upward moving clamp comprises an upward moving sliding sleeve which is slidably sleeved on the upper half part of the front sliding plate, an upward moving push plate which is arranged at the rear part of the upper end of the upward moving sliding sleeve, an upward moving jack which is formed on the upward moving push plate and is sleeved with the rear sliding plate, a lower insertion plate which is formed below the front end of the upward moving sliding sleeve and penetrates through the lower insertion plate, and an upward moving clamping plate which is formed in front of the lower end of the lower insertion plate.

And the quick adjusting device is used for quickly adjusting the posture of the clamping device. The quick adjustment device comprises:

the central gear is rotatably arranged on the gear mandrel and positioned between the rear connecting plate and the rear sliding plate;

the lower pushing assembly comprises a lower shaft body which is arranged on the right side of the upper end surface of the device shell and penetrates through the upper moving push plate, and a lower rack which is sleeved on the lower shaft body in a sliding way and is in transmission connection with the central gear;

the upward pushing assembly comprises an upward shaft body which is arranged on the left side of the lower end face of the device shell and penetrates through the downward moving push plate, an upward rack which is arranged on the upward shaft body and is in transmission connection with the central gear, and a small-diameter pull rod which is formed at the upper end of the upward rack and penetrates through the upward moving push plate and the upper end face of the device shell.

And the fine adjustment device is used for accurately adjusting the posture of the clamping device. The fine adjustment device includes:

the screw rod assembly comprises a positive and negative thread pipe longitudinally penetrating through the rear connecting plate, a lower limiting ring formed on the outer wall of the positive and negative thread pipe and positioned below the rear connecting plate, an upper limiting ring formed on the outer wall of the positive and negative thread pipe and positioned above the rear connecting plate, driven locking teeth uniformly distributed on the upper end surface of the upper limiting ring in the circumferential direction, and a second bevel gear formed on the upper end of the outer wall of the positive and negative thread pipe, wherein internal threads with opposite rotation directions are formed at the upper end and the lower end of the inner cavity of the positive and negative thread pipe, and an upper threaded rod and a lower threaded rod are respectively arranged at the upper end and the lower end of the positive and negative thread pipe;

the transmission shell comprises a hollow rectangular shell body, a transmission lower hole formed on the right side of the lower end face of the shell body, a deflector rod through hole formed on the left side of the upper end face of the shell body and a solenoid through hole formed on the right side of the upper end face of the shell body;

the bevel gear driving mechanism comprises a gear mandrel, a driving gear, a first bevel gear and a rotating deflector rod, wherein the gear mandrel is arranged on the left side of the lower end surface of the shell body, the driving gear is rotatably arranged on the gear mandrel, the first bevel gear is formed at the upper end of the driving gear and is in transmission fit with the second bevel gear, the rotating deflector rod is formed at the upper end of the first bevel gear, and the upper end of the rotating deflector rod penetrates through a deflector rod through hole and the upper end surface of the device shell;

the worm wheel driving mechanism comprises a driven gear, a third bevel gear, a fourth bevel gear, a driving worm, a driven worm wheel, driving locking teeth and a reset pressure spring, wherein the driven gear is rotatably arranged on the left side of the upper end face of a shell body and is in transmission connection with the driving gear, the third bevel gear is formed on the lower end face of the driven gear, the fourth bevel gear is formed on the left side of the rear end face of the shell body and is in transmission connection with the third bevel gear, the driving worm is formed on the front end face of the fourth bevel gear, the driven worm wheel is rotatably arranged in a transmission lower hole and is sleeved on a positive and negative thread threaded pipe, the driving locking teeth are circumferentially and uniformly distributed on the lower end face of the driven worm wheel and are in locking fit with the driven locking teeth, the reset pressure spring is wound on the positive and negative thread threaded pipe, the reset pressure spring is positioned between the driven worm wheel and an upper limiting ring, and the driving worm is in transmission connection with the driven worm wheel.

As a further embodiment:

the outer wall of the driven worm wheel is formed with a circle of worm wheel concave ring, and the worm wheel concave ring is in rotating fit with the transmission lower hole so as to limit the axial movement of the driven worm wheel.

As a further embodiment:

the driven gear is rotatably arranged on the driven gear shaft, and the driven gear shaft is fixedly arranged on the upper end face of the shell body.

As a further embodiment:

the lower end of the driven gear shaft is expanded and formed with a cylindrical gear shaft end, and the inner wall of the driven gear is provided with a gear shaft cavity matched with the gear shaft end.

As a further embodiment:

the fourth bevel gear and the driving worm are rotatably arranged on the worm mandrel, one end of the worm mandrel is connected with the front end of the shell body, and the other end of the worm mandrel is connected with the rear end of the shell body.

As a further embodiment:

the inner diameter of the screw through hole is larger than the outer diameter of the bottom of the second bevel gear, so that the second bevel gear can slide through the screw through hole.

Has the advantages that:

according to the carotid blood fluid external control device, the device shell is placed in a body, and the quick adjusting pull rod and the rotating deflector rod are placed in the body through the skin, so that the control is convenient.

The invention relates to an external control device for carotid blood fluid, which provides two modes of rapid regulation and precise regulation:

1. when the carotid thrombus is just taken out in the operation, the distance between the downward moving push plate and the upward moving push plate can be quickly adjusted by using a quick adjustment mode to avoid sudden increase of blood flow.

2. Blood flow is then detected by imaging means such as tibial-cranial doppler and fine-tuned by a fine tuning device.

The external control device for carotid blood fluid is also provided with two modes of general fine adjustment and slow fine adjustment in the precise adjustment mode, so that more precise blood flow adjustment can be realized:

no matter the mode is general fine tuning mode or slow speed fine tuning mode, the distance of two pitches of upper threaded rod up-going and lower threaded rod relative motion is realized through positive and negative screw thread pipe rotation a week, and the structural characteristic of its nut lead screw structure has realized better speed reduction effect, all can become the fine tuning mode.

And the worm and gear speed reduction between the driving worm and the driven worm gear is added in the slow fine adjustment mode, and under the double speed reduction effect, the slow fine adjustment mode has a more precise adjustment effect relative to a common fine adjustment mode.

Description of the drawings:

in order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic view of one embodiment of the carotid blood extracorporeal control apparatus.

FIG. 2 is a schematic view of an embodiment of the carotid blood extracorporeal control device.

FIG. 3 is a cross-sectional view of one embodiment of the device housing.

FIG. 4 is a schematic view of one embodiment of the clamping device.

FIG. 5 is a schematic view of an embodiment of section A-A of FIG. 1.

FIG. 6 is a schematic view of another embodiment of section A-A of FIG. 1.

FIG. 7 is a schematic view of an embodiment of section B-B of FIG. 1.

FIG. 8 is a schematic view of an alternative embodiment of section B-B of FIG. 1.

Fig. 9 is an enlarged view of an embodiment of section D of fig. 1.

Fig. 10 is an enlarged view of another embodiment of section D of fig. 1.

Fig. 11 is an enlarged view of an embodiment of section E of fig. 3.

Icon:

1. the device comprises a device shell, 11, a front sliding plate, 12, a rear sliding plate, 13, a rear connecting plate, 14, a gear mandrel, 15, a front baffle plate, 16, a connecting buckle, 16a, an inserting base plate, 16b, a connecting slot, 16c, a clamping bolt and 15a, a clamping sliding plate, wherein the front baffle plate is arranged on the front end of the device shell;

2. the clamping device comprises a clamping device, 21, an upper clamping device, 21a, a lower moving sliding sleeve, 21b, a lower moving push plate, 21c, a lower moving sleeve hole, 21d, a lower moving front plate, 21e, a lower moving clamping plate, 22, an upper moving clamp, 22a, an upper moving sliding sleeve, 22b, an upper moving push plate, 22c, an upper moving jack, 22d, a lower plugging plate and 22e, an upper moving clamping plate;

3. the quick adjustment device comprises a quick adjustment device, 31, a central gear, 32, a downward pushing assembly, 32a, a downward rack, 33, an upward pushing assembly, 33a, an upward shaft, 33b, an upward rack and 33c, a quick adjustment pull rod;

4. the fine adjustment device comprises a lead screw assembly 41, a positive and negative screw threaded pipe 41a, a lower limiting ring 41b, an upper limiting ring 41c, a driven locking tooth 41d, a second bevel gear 41e, an upper threaded rod 41f, a lower threaded rod 41g, a transmission shell 42, a shell body 42b, a transmission lower hole 42c, a deflector rod through hole 42d, a screw pipe through hole 43, a bevel gear driving mechanism 43a, a gear mandrel 43b, a driving gear 43c, a first bevel gear 43d, a rotating deflector rod 44, a worm gear driving mechanism 44a, a driven gear 44b, a third bevel gear 44c, a fourth bevel gear 44d, a driving worm 44e, a driven worm gear 44f, a driving locking tooth 44g and a reset pressure spring.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

An external carotid blood flow control device:

the device comprises a device shell 1, wherein the device shell 1 is embedded in a patient body and sleeved on a carotid artery a, the device shell 1 is formed into a hollow shell body which is communicated from left to right, and a front stop plate 15 is arranged at the front end of the device shell 1 in a detachable mode. The device shell 1 inner chamber front half along vertically being equipped with leading slide 11, device shell 1 inner chamber rear half along vertically being provided with rearmounted slide 12, the shaping backward of leading slide 11 rear end face middle part has back connecting plate 13, the shaping of back connecting plate 13 rear end has gear dabber 14, gear dabber 14 is connected with rearmounted slide 12 is perpendicular.

As a further embodiment, a disassembly solution of the front baffle 15 is provided:

the upper side and the lower side of the rear end of the front baffle plate 15 are respectively provided with a clamping sliding plate 15 a; the upper and lower ends of the device housing 1 are respectively provided with a connecting buckle 16 for fixing the corresponding clamping slide plate 15a, and the connecting buckle 16 comprises:

an insertion substrate 16a provided inside the upper end surface or the lower end surface of the device case 1;

a connection slot 16b provided in the insertion substrate 16a in the front-rear direction;

and a clamping bolt 16c screwed on the outer side of the corresponding insertion base plate 16a and fixing the corresponding clamping slide plate 15a.

Benefiting from above-mentioned technical scheme, can be fixed with preceding fender 15 installation in the art, then when this device is dismantled to the postoperative, pull down preceding fender 15 earlier then conveniently take out this device from the patient internal.

A clamping device 2 for clamping a patient's carotid artery a; the clamping device 2 comprises a downward moving clamp 21 and an upward moving clamp 22;

the downward moving clamp 21 comprises a downward moving sliding sleeve 21a which is slidably sleeved on the lower half part of the front sliding plate 11, a downward moving push plate 21b which is arranged at the rear part of the lower end of the downward moving sliding sleeve 21a, a downward moving sleeve hole 21c which is formed on the downward moving push plate 21b and is sleeved with the rear sliding plate 12, a downward moving front plate 21d which is formed above the front end of the downward moving sliding sleeve 21a, and a downward moving clamping plate 21e which is formed in front of the upper end of the downward moving front plate 21 d;

the upper moving clamp 22 includes an upper moving sliding sleeve 22a slidably fitted over the upper half of the front sliding plate 11, an upper moving pushing plate 22b disposed behind the upper end of the upper moving sliding sleeve 22a, an upper moving insertion hole 22c formed in the upper moving pushing plate 22b and fitted to the rear sliding plate 12, a lower insertion plate 22d formed below the front end of the upper moving sliding sleeve 22a and passing through the lower insertion plate 21e, and an upper insertion plate 22e formed in front of the lower end of the lower insertion plate 22d.

Thanks to the improved technical scheme, the carotid artery can be clamped by the upward moving splint 22e and the downward moving splint 21e, and the blood flow of the carotid artery is adjusted.

The quick adjusting device 3 is used for quickly adjusting the posture of the clamping device 2; the quick adjustment device 3 includes:

the central gear 31 is rotatably arranged on the gear mandrel 14 and is positioned between the rear connecting plate 13 and the rear sliding plate 12;

the downward pushing assembly 32 comprises a downward shaft body 32a which is arranged on the right side of the upper end surface of the device shell 1 and penetrates through the upward pushing plate 22b, and a downward rack 32b which is slidably sleeved on the downward shaft body 32a and is in transmission connection with the central gear 31;

the upward pushing assembly 33 comprises an upward shaft body 33a which is arranged on the left side of the lower end surface of the device shell 1 and penetrates through the downward moving push plate 21b, an upward rack 33b which is slidably sleeved on the upward shaft body 33a and is in transmission connection with the central gear 31, and a small-diameter pull rod 33c which is formed at the upper end of the upward rack 33b and penetrates through the upward moving push plate 22b and the upper end surface of the device shell 1.

Thanks to the improved technical scheme, the quick adjustment device 3 can drive the upward rack 33b to move upward by pulling the small-diameter pull rod 33c, and further drive the downward rack 32b to move downward by the central gear 31, the upward rack 33b pushes the upward clamping plate 22e to move upward, and the downward rack 32b drives the downward clamping plate 21e to move downward, so as to drive the clamping device 2 to clamp the carotid artery.

And the fine adjustment device 4 is used for accurately adjusting the posture of the clamping device 2.

The fine adjustment device 4 includes:

the screw rod assembly 41 comprises a positive and negative screw thread pipe 41a which longitudinally penetrates through the rear connecting plate 13, a lower limiting ring 41b which is formed on the outer wall of the positive and negative screw thread pipe 41a and is positioned below the rear connecting plate 13, an upper limiting ring 41c which is formed on the outer wall of the positive and negative screw thread pipe 41a and is positioned above the rear connecting plate 13, driven locking teeth 41d which are uniformly distributed on the upper end surface of the upper limiting ring 41c in the circumferential direction, and a second bevel gear 41e which is formed on the upper end of the outer wall of the positive and negative screw thread pipe 41a, wherein the upper end and the lower end of the inner cavity of the positive and negative screw thread pipe 41a are respectively provided with an upper threaded rod 41f and a lower threaded rod 41 g;

a transmission housing 42 including a hollow rectangular housing body 42a, a transmission lower hole 42b formed on the right side of the lower end surface of the housing body 42a, a shift lever through hole 42c formed on the left side of the upper end surface of the housing body 42a, and a solenoid through hole 42d formed on the right side of the upper end surface of the housing body 42 a;

the bevel gear driving mechanism 43 comprises a gear spindle 43a arranged on the left side of the lower end face of the shell body 42a, a driving gear 43b rotatably arranged on the gear spindle 43a, a first bevel gear 43c formed at the upper end of the driving gear 43b and in transmission fit with the second bevel gear 41e, and a rotating shift lever 43d formed at the upper end of the first bevel gear 43c, wherein the upper end of the rotating shift lever 43d penetrates through the shift lever through hole 42c and the upper end face of the device shell 1;

the worm wheel driving mechanism 44 comprises a driven gear 44a which is rotatably arranged on the left side of the upper end surface of the shell body 42a and is in transmission connection with the driving gear 43b, a third bevel gear 44b which is formed on the lower end surface of the driven gear 44a, a fourth bevel gear 44c which is formed on the left side of the rear end surface of the shell body 42a and is in transmission connection with the third bevel gear 44b, a driving worm 44d which is formed on the front end surface of the fourth bevel gear 44c, a driven worm wheel 44e which is rotatably arranged in the transmission lower hole 42b and is sleeved on the positive and negative screw threaded pipe 41a, driving locking teeth 44f which are circumferentially and uniformly distributed on the lower end surface of the driven worm wheel 44e and are in locking fit with the driven locking teeth 41d, and a reset pressure spring 44g which is wound on the positive and negative screw threaded pipe 41a, the return pressure spring 44g is located between the driven worm wheel 44e and the upper limiting ring 41c, and the driving worm 44d is in transmission connection with the driven worm wheel 44e.

Thanks to the above improved solution, the fine tuning device 4 provides a fine tuning solution, and can be specifically divided into a general fine tuning mode and a slow fine tuning mode.

As a further embodiment:

a circle of worm wheel concave ring is formed on the outer wall of the driven worm wheel 44e, and the worm wheel concave ring is in rotating fit with the transmission lower hole 42b so as to limit the axial movement of the driven worm wheel 44e.

Thanks to the above improved solution, the driven worm wheel 44e has only rotational freedom and no axial play freedom.

As a further embodiment:

the driven gear 44a is rotatably disposed on a driven gear shaft, and the driven gear shaft is fixedly disposed on the upper end surface of the housing body 42a.

The lower end of the driven gear shaft is expanded and formed with a cylindrical gear shaft end, and the inner wall of the driven gear 44a is provided with a gear shaft cavity matched with the gear shaft end.

Thanks to the above improved solution, the driven gear 44a has only a rotational freedom and no axial play freedom.

As a further embodiment:

the fourth bevel gear 44c and the driving worm 44d are rotatably disposed on a worm spindle, and one end of the worm spindle is connected with the front end of the housing body 42a, and the other end of the worm spindle is connected with the rear end of the housing body 42a.

As a further embodiment:

the inner diameter of the screw through hole 42d is larger than the outer diameter of the bottom of the second bevel gear 41e so that the second bevel gear 41e can slide through the screw through hole 42d.

Thanks to the above improved solution, when the primary driving mechanism 43 and the transmission housing 42 descend, the solenoid through hole 42d can accommodate the second bevel gear 41e to pass through.

The specific implementation method comprises the following steps:

the carotid blood fluid external control device is applied to carotid endarterectomy. The occurrence of cerebral blood flow transitional perfusion after operation is a main factor causing the life danger of a patient, and the blood flow of the opened blood vessel can be effectively controlled to obviously avoid the occurrence of transitional perfusion, thereby saving the life of the patient and improving prognosis.

In operation, the front stop plate 15 of the carotid body external control device is detached, the carotid artery a is placed between the lower clamping plate 21e and the upper clamping plate 22e, and finally the front stop plate 15 is reset and fixed through the connecting buckle 16.

In operation, the blood flow of the carotid artery a can be controlled:

example 1, fast adjustment:

the quick adjusting pull rod 33c and the ascending rack 33b are pulled upwards;

the upward rack 33b drives the upward push plate 22b, the upward sliding sleeve 22a, the lower insertion plate 22d and the upward clamping plate 22e to move upward;

the ascending rack 33b drives the descending rack 32b to descend through the central gear 31;

the descending rack 32b drives the downward pushing plate 21b, the downward sliding sleeve 21a, the downward front plate 21d and the downward clamping plate 21e to descend;

the upper moving splint 22e and the lower moving splint 21e rapidly clamp the carotid artery, so as to limit the blood flow of the carotid artery a and avoid excessive perfusion of the blood flow;

example 2, fine tuning:

embodiment 2.1, general accurate mode of regulation, bevel gear drive 43 realizes accurate control:

under normal conditions, the reset pressure spring 44g acts on the driven worm gear 44e, the transmission housing 42 and the bevel gear driving mechanism 43 to enable the driven worm gear, the transmission housing and the bevel gear driving mechanism 43 to move upwards, the first bevel gear 43c is in transmission contact with the second bevel gear 41e, and the driving lock gear 44f is separated from the driven lock gear 41 d;

turning the rotating shift lever 43d, the driving gear 43b and the first bevel gear 43 c;

the first bevel gear 43c drives the second bevel gear 41e and the front and back thread threaded pipe 41a to rotate, and drives the upper threaded rod 41f to move upwards and the lower threaded rod 41g to move downwards;

the upper threaded rod 41f drives the upper moving push plate 22b, the upper moving sliding sleeve 22a, the lower inserting plate 22d and the upper moving clamping plate 22e to move upwards;

the lower threaded rod 41g drives the downward moving push plate 21b, the downward moving sliding sleeve 21a, the downward moving front plate 21d and the downward moving clamping plate 21e to move downwards;

the upper moving splint 22e and the lower moving splint 21e clamp the carotid artery a, so as to limit the blood flow of the carotid artery a;

in the synchronous process, the driving gear 43b drives the driven gear 44a, the third bevel gear 44b, the fourth bevel gear 44c and the driving worm 44d to rotate, the driving worm 44d drives the driven worm gear 44e and the driving lock gear 44f to rotate, but the driving lock gear 44f cannot drive the positive and negative thread threaded pipes 41a to rotate because the driving lock gear 44f is separated from the driven lock gear 41d.

Example 2.2, slow fine tuning mode, i.e. worm gear fine control:

the rotating shift lever 43d is pressed downwards to drive the transmission housing 42 and the bevel gear driving mechanism 43 to move downwards, the first bevel gear 43c and the second bevel gear 41e are separated from transmission contact, and the driving lock gear 44f and the driven lock gear 41d are in transmission contact;

at this time, the rotating shift lever 43d is twisted while being pressed downwards, so that the driving gear 43b drives the driven gear 44a, the third bevel gear 44b, the fourth bevel gear 44c and the driving worm 44d to rotate, the driving worm 44d drives the driven worm gear 44e and the driving lock gear 44f to rotate, and the driving lock gear 44f drives the driven lock gear 41d, the upper limit ring 41c and the front and back thread threaded pipe 41a to rotate, so as to drive the upper threaded rod 41f to move upwards and the lower threaded rod 41g to move downwards;

the upper threaded rod 41f drives the upper moving push plate 22b, the upper moving sliding sleeve 22a, the lower inserting plate 22d and the upper moving clamping plate 22e to move upwards;

the lower threaded rod 41g drives the downward moving push plate 21b, the downward moving sliding sleeve 21a, the downward moving front plate 21d and the downward moving clamping plate 21e to move downwards;

the upper and lower clamping plates 22e and 21e clamp the carotid artery a, thereby restricting the blood flow of the carotid artery a.

No matter in a general fine adjustment mode or a slow fine adjustment mode, the upper threaded rod 41f moves upwards and the lower threaded rod 41g moves relatively by a distance of two screw pitches by rotating the positive and negative threaded pipes 41a for one circle, and the structural characteristic of the nut and screw rod structure realizes a good speed reduction effect and can be in the fine adjustment mode.

And the worm and gear speed reduction between the driving worm 44d and the driven worm wheel 44e is added in the slow fine adjustment mode, and under the double speed reduction effect, the adjustment effect can be more precise compared with the general fine adjustment mode.

It should be noted that the quick adjustment rod 33c and the rotary shift lever 43d are exposed to the outside of the skin when the wound is sutured. Is convenient to control in vitro after the suture is finished.

As a further embodiment, the diameter of the quick adjusting pull rod 33c and the diameter of the rotating shift lever 43d are not larger than 10 mm.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.