CN221730725U - Injector for radial artery compression hemostat and radial artery compression hemostat - Google Patents

Abstract

The utility model discloses an injector for a radial artery compression hemostat and the radial artery compression hemostat. The injector comprises: a syringe having a chamber; the first end of the push rod is positioned in the cavity of the needle cylinder and provided with a rubber plug, the rubber plug is in sealing fit with the inner wall of the cavity of the needle cylinder, and the second end of the push rod is positioned outside the cavity of the needle cylinder; when the push rod is positioned at the second position, the push rod can drive the rubber plug to move outwards from the bottom of the cavity of the needle cylinder by a fixed distance along the axial direction of the cavity of the needle cylinder, so that quantitative exhaust is carried out. The injector adopts an innovative push rod design, realizes quantitative limit exhaust operation, reduces the operation difficulty and workload of medical staff, and reduces the occurrence of complications such as patient re-bleeding and the like.

Description

Injector for radial artery compression hemostat and radial artery compression hemostat

Technical Field

The utility model belongs to the technical field of medical appliances, and particularly relates to an injector for a radial artery compression hemostat and the radial artery compression hemostat.

Background

Radial artery intervention is currently the most common site of intervention. After the radial artery interventional operation is completed, the arterial puncture point needs to be subjected to compression hemostasis. Currently, conventional hemostats include balloon compression hemostats, knob compression hemostats, elastic bandage bundling hemostats, and the like, wherein the balloon hemostats can effectively stop bleeding and have the highest comfort level for patients, so that the balloon hemostats are widely applied. The basic operation of balloon hemostats is to first align the inflatable balloon to the puncture site, then to fix the band, and then to use an injector to inject a volume of air to bulge the inflatable balloon and thereby compress the radial artery puncture site. Then, the pressure of the inflatable air bag is gradually released by quantitatively deflating every time, the compression force of the puncture point is relieved, the volume of each deflation is about 2ml, and after a plurality of deflating operations, the hemostasis is finally completed.

However, in the conventional hemostat, when the balloon is deflated, the medical staff needs to control the amount of the fluid discharged from the injector by one hand and hold the connecting portion of the check valve by the other hand. The operation of controlling the exhaust amount by one hand is inconvenient, and because the air pressure in the inflatable air bag is large, the internal air is easy to quickly rush into the injector to push the push rod to move outwards, so that the exhaust amount is excessive, and the patient is led to press the part to bleed again.

Disclosure of utility model

In order to solve the technical problems in the prior art, the embodiment of the utility model provides an injector for a radial artery compression hemostat and the radial artery compression hemostat, and the injector can simply realize quantitative deflation operation, reduce the operation difficulty and the workload of medical staff and reduce the occurrence of complications such as patient re-bleeding and the like.

Embodiments of the present utility model provide an injector for a radial artery compression hemostat. The injector comprises: a syringe having a chamber; the first end of the push rod is positioned in the cavity of the needle cylinder and provided with a rubber plug, the rubber plug is in sealing fit with the inner wall of the cavity of the needle cylinder, and the second end of the push rod is positioned outside the cavity of the needle cylinder; when the push rod is positioned at the second position, the push rod can drive the rubber plug to move outwards from the bottom of the cavity of the needle cylinder by a fixed distance along the axial direction of the cavity of the needle cylinder, so that quantitative exhaust is carried out.

In some embodiments, the injector further comprises a C-ring secured to the opening of the syringe.

In some embodiments, the outer end of the C-ring has a flange with a radius that tapers outwardly; and/or the C-ring is secured to the opening of the barrel by a snap fit or laser welding.

In some embodiments, the injector further comprises a stop mechanism that limits the plunger to move the plunger a fixed distance outwardly from the bottom of the chamber of the syringe along the axial direction of the chamber of the syringe when the plunger is in the second position.

In some embodiments, the stop mechanism includes a stop plate disposed on the push rod, the stop plate being capable of freely moving through the notch of the C-ring along the axial direction of the chamber of the syringe when the push rod is in the first position, and being blocked by the C-ring after moving a fixed distance from the bottom of the chamber of the syringe along the axial direction of the chamber of the syringe when the push rod is in the second position.

In some embodiments, the push rod comprises a rod body, a plurality of ribs extending along the length direction of the rod body are arranged on the rod body, and the limiting plate is arranged on one rib of the plurality of ribs.

In some embodiments, the stopper plate includes a radial stopper portion extending perpendicular to the axial direction of the chamber and an axial stopper portion extending from an outer edge of the radial stopper portion parallel to the axial direction of the chamber to the second end of the push rod, the distance between the radial stopper portion and the C-ring being equal to the fixed distance when the rubber stopper contacts the bottom of the chamber of the syringe.

In some embodiments, the purge gas of the injector is 1.5ml to 2.5ml when the plunger moves the plunger a fixed distance outwardly from the bottom of the chamber of the syringe in the direction of the axis of the chamber of the syringe.

In some embodiments, the second end of the push rod is provided with a knob for rotating the push rod.

The embodiment of the utility model also provides a radial artery compression hemostat. The radial artery compression hemostat comprises: a wristband for wearing on a wrist; a support plate connected with the wrist strap, the inner side of the supporting plate is provided with an inflatable air bag; and an injector for the radial artery compression hemostat, the injector being connected to the inflatable balloon for inflating and deflating the inflatable balloon.

In some embodiments, the radial artery compression hemostat injector is as described above.

Compared with the prior art, the technical scheme of the embodiment of the utility model has the following advantages:

According to the embodiment of the utility model, the push rod can rotate between the first position and the second position relative to the needle cylinder, when the push rod is positioned at the first position, the push rod can drive the rubber plug to move freely along the axial direction of the cavity of the needle cylinder, and when the push rod is positioned at the second position, the push rod can drive the rubber plug to move outwards for a fixed distance from the bottom of the cavity of the needle cylinder along the axial direction of the cavity of the needle cylinder, so that quantitative exhaust is performed. Therefore, the injector can simply realize quantitative deflation operation, reduce the operation difficulty and workload of medical staff and reduce the occurrence of complications such as patient re-bleeding and the like.

Further, the injector further comprises a limiting mechanism, when the push rod is located at the second position, the limiting mechanism limits the push rod to drive the rubber plug to move outwards from the bottom of the cavity of the needle cylinder for a fixed distance along the axial direction of the cavity of the needle cylinder. The rubber plug is limited to move by a fixed distance through the limiting mechanism, so that the problem that the air in the inflatable air bag with large air pressure is easy to quickly rush into the injector to push the push rod to move outwards is avoided, and the problem that the patient presses the part to bleed again due to excessive air displacement is avoided.

Drawings

Other features and advantages of the present utility model will be better understood from the following detailed description of alternative embodiments taken in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof, and wherein:

Fig. 1 shows a front perspective view of an injector for a radial artery compression hemostat in accordance with an embodiment of the present utility model;

Fig. 2 shows a rear perspective view of an injector for a radial artery compression hemostat with a portion of the syringe removed to illustrate the internal structure of the injector, in accordance with an embodiment of the present utility model;

Fig. 3 shows a front perspective view of a pushrod of an injector for radial artery compression hemostat according to an embodiment of the present utility model;

Fig. 4 shows a rear perspective view of a pushrod of an injector for radial artery compression hemostat in accordance with an embodiment of the present utility model;

Fig. 5 shows a cross-sectional view of a pushrod of an injector for radial artery compression hemostat in accordance with an embodiment of the present utility model;

FIG. 6 shows a schematic side view of a pushrod and C-ring for an injector of a radial artery compression hemostat in accordance with an embodiment of the present utility model;

FIG. 7 shows a schematic perspective view of a pushrod and C-ring for an injector of a radial artery compression hemostat in accordance with an embodiment of the present utility model;

FIG. 8 illustrates a schematic view of the distance traveled by a pushrod of an injector for a radial artery compression hemostat in accordance with an embodiment of the present utility model;

Figures 9A-9D illustrate a schematic of the use of an injector for a radial artery compression hemostat in accordance with an embodiment of the present utility model.

Detailed Description

The making and using of the embodiments are discussed in detail below. It should be understood, however, that the detailed description and the specific examples, while indicating specific ways of making and using the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model. The structural position of the various components as described, such as the directions of up, down, top, bottom, etc., is not absolute, but rather relative. When the individual components are arranged as shown in the figures, these directional expressions are appropriate, but when the position of the individual components in the figures changes, these directional expressions also change accordingly.

As described in the background art, when the balloon is exhausted in the conventional hemostat, a medical staff needs to control the exhaust amount of the injector by one hand and hold the connecting portion of the check valve by the other hand. The operation of controlling the exhaust amount by one hand is inconvenient, and because the air pressure in the inflatable air bag is large, the internal air is easy to quickly rush into the injector to push the push rod to move outwards, so that the exhaust amount is excessive, and the patient is led to press the part to bleed again.

To this end, embodiments of the present utility model provide an injector for a radial artery compression hemostat. The injector has the advantage that the limit exhaust function is added on the premise of maintaining the basic function of the existing injector.

Specifically, the injector includes: a syringe having a chamber; the first end of the push rod is positioned in the cavity of the needle cylinder and provided with a rubber plug, the rubber plug is in sealing fit with the inner wall of the cavity of the needle cylinder, and the second end of the push rod is positioned outside the cavity of the needle cylinder; when the push rod is positioned at the second position, the push rod can drive the rubber plug to move outwards from the bottom of the cavity of the needle cylinder by a fixed distance along the axial direction of the cavity of the needle cylinder, so that quantitative exhaust is carried out.

The structure and function of a radial artery compression hemostat in accordance with particular embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

As shown in fig. 1-2, an injector 100 for a radial artery compression hemostat is shown in accordance with an embodiment of the present utility model. The injector 100 includes a syringe 10 and a ram 20. The cylinder 10 has a chamber, one end of the cylinder 10 has a filling hole 11 communicating with the air bladder, the other end has an opening 12, and the push rod 20 is inserted into the cylinder 10 through the opening 12. The plunger 20 is movable along the axial direction of the chamber of the cylinder 10. The first end of the push rod 20 is positioned in the cavity of the syringe 10 and is provided with a rubber plug 30, the rubber plug 30 is in sealing fit with the inner wall of the cavity of the syringe 10, and the second end of the push rod 20 is positioned outside the cavity of the syringe 10.

Wherein, the push rod 20 can rotate between a first position and a second position relative to the syringe 10, when the push rod 20 is located at the first position, the push rod 20 can drive the rubber plug 30 to move freely along the axial direction of the cavity of the syringe 10, and when the push rod 20 is located at the second position, the push rod 20 can drive the rubber plug 30 to move outwards from the bottom of the cavity of the syringe 10 by a fixed distance along the axial direction of the cavity of the syringe 10, so as to perform quantitative exhaust.

Thus, the injector 100 can realize quantitative limit exhaust operation, reduce the operation difficulty and workload of medical staff, and reduce the occurrence of complications such as patient re-bleeding.

In some embodiments, the injector 100 further includes a novel C-ring 40 design, the C-ring 40 being secured to the opening 12 of the syringe 10, the outer end of the C-ring 40 having a radially outwardly tapered flange 41, the flange 41 ensuring that the mating position of the C-ring 40 does not overly enter the opening 12 of the syringe 10.

In some embodiments, the C-ring 40 is secured to the opening of the barrel 10 by a chimeric fit or by laser welding.

In some embodiments, the barrel 10 and the C-ring 40 are formed of PP material and are secured together, such as by welding.

In some embodiments, the C-ring 40 may also be made of thermoplastic such as PE, PC, PS, PMMA and the pushrod 20 made of thermoplastic such as PP, PE, PET.

In some embodiments, the injector 100 further comprises a stop mechanism that limits the plunger 20 from moving the stopper 30 a fixed distance outwardly from the bottom of the chamber of the syringe 10 along the axial direction of the chamber of the syringe 10 when the plunger 20 is in the second position.

As shown in connection with fig. 3 and 4, in some embodiments, the stopper mechanism includes a stopper plate 50 disposed on the plunger 20, the stopper plate 50 being capable of freely moving through the notch of the C-ring 40 in the axial direction of the chamber of the syringe 10 when the plunger 20 is in the first position, and the stopper plate 50 being blocked by the C-ring 40 after moving a fixed distance from the bottom of the chamber of the syringe 10 in the axial direction of the chamber of the syringe 10 when the plunger 20 is in the second position.

In some embodiments, the limiting plate 50 includes a radial limiting portion 51 and an axial limiting portion 52, the radial limiting portion 51 extending perpendicular to the axial direction of the chamber, the axial limiting portion 52 extending parallel to the axial direction of the chamber. The axial stop 52 extends from a portion or all of the outer edges of the radial stop 51 parallel to the axial direction of the chamber to the second end of the push rod 20. The distance between the radial limit portion 51 and the C-ring 40 is equal to a fixed distance by which the push rod 20 can move.

As shown in fig. 5 and 6, in some embodiments, the push rod 20 includes a rod body 21, a plurality of ribs 22 extending along a length direction of the rod body 21 are provided on the rod body 21, and the limiting plate 50 is provided on one rib 22 of the plurality of ribs 22. In some embodiments, one or more axial ribs 23 may be provided on the pushrod 20.

In some embodiments, the push rod 20 is provided with four symmetrical ribs 22, and the four ribs 22 are distributed in a cross shape, including 1 long rib (first rib) and 3 short ribs (second rib), and the limiting plate 50 is formed on the long ribs, wherein the radius R1 of the long ribs is greater than the radius R2 of the short ribs.

In some embodiments, each rib 22 is provided with one or more grooves 221, and the axial reinforcing ribs 23 are positioned in the corresponding grooves 221, so that the problem of deformation and bending of the molded product of the push rod 20 caused by an asymmetric structure is alleviated. In other embodiments, the axial ribs 23 are integrally formed with each rib 22.

In some embodiments, when the plunger 20 moves the stopper 30 outwardly from the bottom of the chamber of the syringe 10a fixed distance along the axial direction of the chamber of the syringe 10, the purge amount of the injector 100 is related to the distance moved, for example, the purge amount of the injector 100 may be 1.5ml-2.5ml. For example, the amount of exhaust gas from each injector 100 may be 2ml, or another value.

The radius Rc of the C-ring 40 is smaller than the radius R1 of the long rib and larger than the radius R2 of the short rib, so the short rib of the push rod 20 can pass through the C-ring while the long rib can be blocked by the C-ring. The left-right rotation limit of the push rod is realized through the matching of the long ribs and the opening end face of the C-shaped ring 40, so that the switching between the quantitative exhaust and the free exhaust is realized.

In some embodiments, the second end of the push rod 20 is provided with a grip or knob 24 for rotating the push rod 20 to facilitate user operation of the push rod 20.

In some embodiments, the first end of the push rod 20 is provided with a chuck 25 for mounting the plug 30.

As shown in connection with fig. 7 and 8, when the push rod 20 is rotated clockwise until the long ribs contact the end face of the C-ring 40, there is a mating limit for the push rod 20 with the C-ring 40 in the axial direction.

The automatic limit is realized by the cooperation of the limit plate 50 and the C-shaped ring 40, and the limit distance (exhaust amount) depends on the distance L from the radial limit part 51 of the limit plate 50 to the C-shaped ring 40. The distance L may be designed and adjusted according to the radial limit portion 51 of the limit plate 50 on the push rod 20 and the thickness of the C-ring 40.

As shown in fig. 9A and 9B, when the push rod 20 is rotated counterclockwise to the point where the long rib is offset from the end face of the C-ring 40, that is, when the long rib is located in the opening of the C-ring 40, the movement of the push rod 20 is not restricted by the C-ring 40, and free movement of the push rod 20 is possible.

As shown in fig. 9C and 9D, when the push rod 20 is rotated clockwise until the long rib is aligned with the end face of the C-ring 40, i.e., when the long rib is located outside the opening of the C-ring 40, the push rod 20 will be blocked by the end face of the C-ring 40 from further outward movement when pulled outward by the distance L. The pushing of the push rod 20 by the gas is automatically stopped when it reaches a fixed distance, corresponding to the discharge of the quantitative gas.

The method of switching to the conventional injector: the push rod 20 is rotated counterclockwise to a position where the limiting plate 50 is located in the opening of the C-ring 40, at which time the limiting plate 50 of the push rod 20 is deactivated and the push rod 20 can be pulled out freely.

The method for switching to limit exhaust comprises the following steps: the push rod 20 was rotated clockwise to a position where the limiting plate 50 was located outside the opening of the C-ring 40, at which time the limiting plate 50 of the push rod 20 was active, the push rod 20 was only able to be stretched to a fixed distance, with an air displacement of 2 ml.

The embodiment of the utility model also provides a radial artery compression hemostat. The radial artery compression hemostat comprises: wristband, support plate, and injector 100. The wrist strap is used for being worn on the wrist, the supporting plate is connected with the wrist strap to form an annular structure, and the inner side of the supporting plate is provided with an inflatable air bag. The injector 100 is connected to an inflatable balloon for inflating and deflating the inflatable balloon.

While the foregoing has described the technical content and features of the present utility model, it will be appreciated that those skilled in the art, upon attaining the teachings of the present utility model, may make variations and improvements to the concepts disclosed herein, which fall within the scope of the present utility model. The above description of embodiments is illustrative and not restrictive, and the scope of the utility model is defined by the claims.

Claims (10)

1. An injector for a radial artery compression hemostat, comprising:

A syringe having a chamber; and

The first end of the push rod is positioned in the cavity of the needle cylinder and is provided with a rubber plug, the rubber plug is in sealing fit with the inner wall of the cavity of the needle cylinder, and the second end of the push rod is positioned outside the cavity of the needle cylinder;

The push rod can rotate between a first position and a second position relative to the needle cylinder, when the push rod is positioned at the first position, the push rod can drive the rubber plug to freely move along the axial direction of the cavity of the needle cylinder, and when the push rod is positioned at the second position, the push rod can drive the rubber plug to move outwards for a fixed distance along the axial direction of the cavity of the needle cylinder from the bottom of the cavity of the needle cylinder, so that quantitative exhaust is performed.

2. The injector for radial artery compression hemostat of claim 1 further comprising a C-ring secured to the opening of the syringe.

3. An injector for a radial artery compression hemostat of claim 2 wherein the outer end of said C-ring has a flange with a progressively increasing radius outwardly; and/or

The C-ring is secured to the opening of the barrel by a chimeric fit or by laser welding.

4. An injector for a radial artery compression hemostat according to any one of claims 2 to 3 further comprising a stop mechanism limiting the movement of the plunger to a fixed distance outwardly from the bottom of the chamber of the barrel along the axial direction of the chamber of the barrel when the plunger is in the second position.

5. The injector for a radial artery compression hemostat of claim 4, wherein the stop mechanism comprises a stop plate disposed on the ram, the stop plate being free to move through the notch of the C-ring along the axial direction of the chamber of the syringe when the ram is in the first position, the stop plate being blocked by the C-ring after moving a fixed distance from the bottom of the chamber of the syringe along the axial direction of the chamber of the syringe when the ram is in the second position.

6. An injector for a radial artery compression hemostat of claim 5 wherein said pushrod comprises a rod body having a plurality of ribs extending along a length of said rod body, said stop plate being disposed on one of said plurality of ribs.

7. An injector for a radial artery compression hemostat of claim 5, wherein the stop plate includes a radial stop and an axial stop, the radial stop extending perpendicular to the axial direction of the chamber, the axial stop extending from an outer edge of the radial stop parallel to the axial direction of the chamber to the second end of the pushrod, the distance between the radial stop and the C-ring being equal to the fixed distance when the rubber stopper contacts the bottom of the chamber of the syringe.

8. The injector for radial artery compression hemostat of claim 7 wherein the displacement of the injector is 1.5ml-2.5ml when the push rod moves the rubber plug outwardly a fixed distance from the bottom of the chamber of the syringe along the axial direction of the chamber of the syringe.

9. An injector for a radial artery compression hemostat of claim 4 wherein said second end of said pushrod is provided with a knob for rotating said pushrod.

10. A radial artery compression hemostat, comprising:

a wristband for wearing on a wrist;

The support plate is connected with the wrist strap, and an inflatable air bag is arranged on the inner side of the support plate; and

An injector for a radial artery compression hemostat of any one of claims 1-9 connected to said inflatable balloon for inflating and deflating said inflatable balloon.