CN113892991B - Pressure-adjustable renal artery blocking forceps - Google Patents

Abstract

The invention discloses a renal artery blocking clamp capable of adjusting pressure, which comprises an outer cylinder, clamp arms, an adjusting assembly, an air bag and an air pump, wherein the outer cylinder is arranged on the clamp arms; the two jawarms are hinged at the front end of the outer cylinder, the adjusting component comprises a movable cylinder, an inner cylinder, a supporting rod and a spring, the movable cylinder is positioned in the outer cylinder, the front end of the movable cylinder is in an open horn mouth shape and is sleeved at the tail part of the jawarms, the inner cylinder is fixedly arranged in the movable cylinder, the spring is positioned in the inner cylinder, one end of the supporting rod is provided with a disc and is propped between the tail parts of the two jawarms, and the other end of the supporting rod is inserted into the inner cylinder and is propped against one end of the spring; the air bag is positioned in the outer cylinder and behind the moving cylinder and is connected with the air pump; the invention utilizes the front and back positions of the movable cylinder to accurately control the opening degree of the two forceps arms, realizes the dynamic change of the renal artery in operation between the three states of 'unblocking', 'incompletely blocking' and 'completely blocking', can be matched with a doctor to finish the kidney operation, and can also reduce the risk of postoperative renal dysfunction of a patient.

Description

A pressure-adjustable renal artery blocking forceps

technical field

The invention relates to the field of medical devices, in particular to a pressure-adjustable renal artery blocking forceps.

Background technique

Renal artery blocking forceps are mainly used to clamp the renal artery during renal surgery, blocking the blood supply from the renal artery to the kidney, so that the kidney is temporarily in a state of ischemia, so that doctors can perform tumor resection, wound suture and other related operations on the kidney. However, arterial occlusion may affect the patient's short-term or even long-term renal function after surgery, and the specific degree of influence has a great relationship with the time of arterial occlusion. In order to ensure the postoperative effect of the patient as much as possible, the doctor will flexibly control the renal artery blocking forceps according to the bleeding situation during the operation, so that the kidney is not completely in an ischemic state, thereby reducing the chance of postoperative renal insufficiency. At present, the renal artery blocking forceps used by doctors all need to be manually operated, and the pressure of the blocking forceps on the renal artery can only be adjusted manually by the doctor, which is not only troublesome to operate, but also has poor adjustment accuracy.

Contents of the invention

The technical problem to be solved by the present invention is that the blocking effect of the renal artery blocking forceps in the prior art on the renal artery can only be adjusted manually by a doctor, and the operation is cumbersome and the adjustment accuracy is poor.

In order to solve the above-mentioned technical problems, the technical solution adopted in the present invention is: a pressure-adjustable renal artery blocking forceps, including an outer cylinder, forceps arms, adjustment components, an air bag, and an air pump;

The number of the clamp arms is two, the two clamp arms are hinged at the front end of the outer tube, the tail of the clamp arms is located inside the outer tube, and the front ends of the clamp arms are used to clamp the renal artery;

The adjustment assembly includes a moving cylinder, an inner cylinder, a strut and a spring. The moving cylinder is located inside the outer cylinder. Inside the moving cylinder, the spring is located in the inner cylinder, the inner cylinder, the moving cylinder, the outer cylinder and the strut are concentric, one end of the strut is provided with a disk and is placed between the tails of the two pliers arms, and the other end of the strut is inserted into the inner one end of the barrel and against the spring;

The air bag is located in the outer cylinder and behind the moving cylinder, and the air bag is connected with an air pump;

The function of the airbag is to push the moving cylinder. When the airbag is inflated, the moving cylinder will move forward in the outer cylinder. The bell mouth at the front end of the moving cylinder is in the shape of a large front and a small rear. As the moving cylinder advances, the bell mouth forces the two clamp arms The tails of the pincers are close to each other, so that the front ends of the pincer arms are close to each other, the clamping force of the pincer arms on the renal artery is increased, and the blocking effect on the renal artery is increased;

On the contrary, after the air pressure in the air bag is reduced, the spring makes the moving cylinder and the inner cylinder move backward, and the strut moves forward slightly. The tightening force is reduced, and the blocking effect on the renal artery is reduced;

The opening degree of the two forceps arms is always controlled by the bell mouth at the front end of the moving cylinder. By precisely controlling the position of the moving cylinder, the blocking effect of the two forceps arms on the renal artery can be controlled, that is, the effect of the two forceps arms on the renal artery The degree of blocking is positively correlated with the air pressure in the air bag; the doctor only needs to control the pressure in the air bag through the air pump to control the blocking effect of the forceps arm on the renal artery. If the air pump with intelligent pressure control is used, the doctor can also set the air pressure in the air bag. The pressure changes periodically within a certain range, which makes the blocking effect of the forceps arm on the renal artery in a dynamic change, and realizes the "non-blocking", "incomplete blocking" and "complete blocking" of the renal artery during the operation. "Dynamic changes between the three states;

The function of the struts is to ensure that the two pliers arms will open as the moving cylinder retreats, so that the moving cylinder can only control the tightening of the pliers arms but cannot control the opening of the pliers arms.

Further, the outer cylinder includes a front cover, a middle cylinder and a rear cover, the front cover and the rear cover are installed at both ends of the middle cylinder respectively, the two clamp arms are hinged with the front cover, and the airbag is fixed on the rear cover; the front cover and the Both the back cover and the middle barrel are threaded to facilitate the disassembly of the two arms and the airbag; after use, the arms of the blocking pliers are most susceptible to dirt. This detachable design facilitates cleaning of the arms and replacement of damaged arms. the clamp arm.

Further, the outer surface of the moving cylinder is provided with balls, the inner wall of the middle cylinder is provided with axial ball grooves, the balls are located in the ball grooves, and the balls are used to reduce the friction between the moving cylinder and the middle cylinder, and also Can avoid noise.

Further, a pressure relief valve is provided on the rear cover, and the pressure relief valve communicates with the air bag; under normal circumstances, the air pump itself is sufficient to control the air pressure in the air bag, and there is no need to use a pressure relief valve; the pressure relief valve is used in the case of equipment failure Next, manually release the pressure of the air bag.

Further, the surface of the middle cylinder is provided with an axial long groove, and the adjustment assembly also includes a push button, the bottom of the push button passes through the long groove and is connected with the moving cylinder, and the doctor can manually operate the moving cylinder to move forward and backward through the push button ; The function of the push button is the same as that of the pressure relief valve, and it is mainly used for the doctor to manually control the forceps arm in some special cases.

Further, the renal artery blocking forceps also includes a limit screw, which is mounted on the middle cylinder; the outer surface of the moving cylinder is provided with a limit convex ring, and the ball is installed on the limit convex ring; the limit screw is in the On the moving path of the limiting convex ring, the limiting screw is used to control the limit position of the moving cylinder.

Further, the bottom of the moving cylinder is provided with an installation shaft, the surface of the installation shaft is provided with threads, and the inner cylinder is fixed on the installation shaft through threads, and a limit plate is set at one end of the support rod inserted into the inner cylinder, and the limit plate is against the Spring; the design of the mounting shaft is conducive to the installation of the inner cylinder, and the limit plate is used to ensure that the strut will not come out of the inner cylinder.

Further, the inside of the airbag is provided with a skeleton ring, which is used to maintain the general shape of the airbag; the air pump is provided with a pressure gauge, which is used to display the current air pressure in the airbag.

Beneficial effects: (1) The renal artery blocking forceps of the present invention uses the air pump and the air bag to control the translation of the moving cylinder, and then uses the front and rear positions of the moving cylinder to accurately control the opening degree of the two forceps arms, thereby changing the resistance of the forceps arms to the renal artery. The cutting effect can realize the dynamic change of the renal artery during the operation among the three states of "no blocking", "incomplete blocking" and "complete blocking", which can not only cooperate with the doctor to complete the kidney operation, but also reduce the postoperative Risk of renal dysfunction. (2) The renal artery blocking forceps of the present invention are provided with struts and springs in the inner cylinder, and the struts are used to ensure that the two forceps arms will open as the moving cylinder retreats, so that the opening angle of the two forceps arms is the same as that of the spring. The positions of the moving cylinders are in one-to-one correspondence, which improves the control accuracy of the tong arm. (3) The renal artery occluding forceps of the present invention is provided with an axial ball groove on the inner wall of the middle barrel, and the friction force between the moving barrel and the middle barrel is reduced by the balls, which facilitates the free translation of the moving barrel while reducing noise. (4) The renal artery blocking clamp of the present invention is equipped with a pressure relief valve and a push button, which is convenient for the doctor to manually control the two clamp arms under special circumstances.

Description of drawings

Fig. 1 is a cross-sectional view of the renal artery blocking forceps in Example 1 (not including the air pump).

Fig. 2 is a sectional view of A-A of Fig. 1 (hiding the airbag).

Fig. 3 is a B-B sectional view of Fig. 2 .

4 is a schematic structural view of the air pump in Embodiment 1.

Fig. 5 is a diagram of the applied state of the renal artery blocking forceps in Example 1.

Among them: 100, outer cylinder; 110, front cover; 120, middle cylinder; 121, ball groove; 122, long groove; 130, back cover; 131, interface; 200, clamp arm; 300, adjustment component; 310, moving cylinder ; ; 410, skeleton ring; 500, air pump; 510, pressure gauge; 600, limit screw; 700, pressure relief valve;

Detailed ways

The present invention will be further described in detail below in combination with specific embodiments.

Example 1

As shown in FIGS. 1 to 4 , the pressure-adjustable renal artery occlusive clamp of this embodiment includes an outer cylinder 100 , a forceps arm 200 , an adjustment assembly 300 , an air bag 400 , an air pump 500 , a limit screw 600 and a pressure relief valve 700 ;

The outer cylinder 100 includes a front cover 110, a middle cylinder 120 and a rear cover 130, the front cover 110 and the rear cover 130 are respectively installed at both ends of the middle cylinder 120, the two clamp arms 200 are hinged with the front cover 110, and the airbag 400 is fixed on the rear cover 130, the front cover 110 and the rear cover 130 are threadedly connected to the middle tube 120; the tail of the pincer arm 200 is located in the inner cavity of the middle tube 120;

The adjustment assembly 300 includes a moving cylinder 310, an inner cylinder 320, a strut 330, a spring 340 and a push button 350. The moving cylinder 310 is located inside the outer cylinder 100, and the front end of the moving cylinder 310 is in the shape of an open trumpet mouth and covers the pliers arm At the tail of 200, the outer surface of the moving cylinder 310 is provided with a limiting convex ring 311, and a ball 312 is installed in the limiting convex ring 311, and the inner wall of the middle cylinder 120 is provided with an axial ball groove 121, and the ball 312 is located in the ball groove 121; As shown in Figure 2 and Figure 3, the limit screw 600 is installed on the middle cylinder 120, the limit screw 600 is on the moving path of the limit convex ring 311, and the position of the limit screw 600 is staggered from the position of the ball groove 121 (for convenience As shown in the figure, the position of the two pliers arms 200 is rotated in Fig. 3); the surface of the middle cylinder 120 is provided with an axial long groove 122, and the bottom of the push button 350 passes through the long groove 122 to connect with the moving cylinder 310;

The bottom of the moving cylinder 310 is provided with an installation shaft 313, and the surface of the installation shaft 313 is provided with threads. The inner cylinder 320 is fixed on the installation shaft 313 by threads, and the spring 340 is located in the inner cylinder 320. The inner cylinder 320, the moving cylinder 310, and the outer cylinder 100 Concentric with the strut 330, one end of the strut 330 is provided with a disk 331 and is pressed between the tails of the two pliers arms 200, the other end of the strut 330 is inserted into the inner cylinder 320 and a limit disc 332 is provided, the limit disc 332 against the spring 340;

The inside of the airbag 400 is provided with a skeleton ring 410, and the airbag 400 is fixed on the rear cover 130. After the rear cover 130 is connected with the middle cylinder 120, the airbag 400 is located in the outer cylinder 100 and behind the moving cylinder 310, and the rear cover 130 is provided with Pressure relief valve 700 and interface 131 , pressure relief valve 700 communicates with airbag 400 , airbag 400 is connected with air pump 500 as shown in FIG. 5 through interface 131 , and air pump 500 is provided with pressure gauge 510 .

The renal artery blocking clamp of this embodiment is mainly used to block the renal artery of the patient during the operation, and the blocking degree can be adjusted. The specific principle is:

(1) As shown in Figure 1, the air pump 500 inflates the air bag 400 to make the air bag 400 bulge, the air bag 400 pushes the moving cylinder 310 to move to the left, and the bell mouth at the front end of the moving cylinder 310 forces the tails of the two pliers arms 200 to approach each other, and then Make the front ends of the forceps arms 200 close to each other, the clamping force of the forceps arms 200 on the renal artery increases, and the blocking effect on the renal artery increases;

(2) As shown in Figure 4, after the air pressure in the airbag 400 is reduced, the spring 340 makes the moving cylinder 310 and the inner cylinder 320 move to the right, and the strut 330 advances slightly. Each forceps arm 200 is gradually opened, the clamping force of the forceps arms 200 on the renal artery is reduced, and the blocking effect on the renal artery is reduced.

It can be seen that the opening degree of the two forceps arms 200 is always controlled by the bell mouth at the front end of the moving cylinder 310, and the blocking effect of the two forceps arms 200 on the renal artery can be controlled by precisely controlling the position of the moving cylinder 310, that is, The blocking degree of the renal artery by the two forceps arms 200 is positively correlated with the air pressure in the air bag 400; the doctor only needs to control the pressure in the air bag 400 through the air pump 500 to control the blocking effect of the forceps arms 200 on the renal artery. The air pump 500 in the air bag can also adopt the air pump 500 with intelligent pressure control. The doctor directly sets the pressure in the air bag 400 to change periodically within a certain range according to the operation situation, so that the blocking effect of the forceps arm 200 on the renal artery is in a dynamic state. During the change, the renal artery can be dynamically changed among the three states of "no occlusion", "incomplete occlusion" and "complete occlusion" during the operation, which can not only cooperate with doctors to complete renal surgery, but also reduce postoperative Risk of renal dysfunction.

Under normal circumstances, the air pump 500 itself in this embodiment is sufficient to control the air pressure in the air bag 400, and there is no need to use the pressure relief valve 700. The pressure relief valve 700 is used to manually release the pressure of the air bag 400 in the event of equipment failure; the push button 350 The function is the same as that of the pressure relief valve 700. It is mainly used by the doctor to manually control the forceps arm 200 in some special cases. In FIG. move, and then realize the opening and closing of the two pliers arms 200.

Although the embodiments of the present invention have been described in the specification, these embodiments are only used as hints and should not limit the protection scope of the present invention. Various omissions, substitutions and changes within the scope not departing from the gist of the present invention shall be included in the protection scope of the present invention.

Claims (6)

1. A renal artery occlusion clip with adjustable pressure, characterized in that: comprises an outer cylinder (100), a clamp arm (200), an adjusting component (300), an air bag (400) and an air pump (500);

the number of the clamp arms (200) is two, the two clamp arms (200) are hinged at the front end of the outer cylinder (100), and the tail parts of the clamp arms (200) are positioned in the outer cylinder (100);

the adjusting assembly (300) comprises a moving cylinder (310), an inner cylinder (320), a supporting rod (330) and a spring (340), wherein the moving cylinder (310) is positioned in the outer cylinder (100), the front end of the moving cylinder (310) is in an open horn mouth shape and is sleeved on the tail of the clamp arm (200), the inner cylinder (320) is fixedly arranged in the moving cylinder (310), the spring (340) is positioned in the inner cylinder (320), the moving cylinder (310), the outer cylinder (100) and the supporting rod (330) are concentric, one end of the supporting rod (330) is provided with a disc (331) and is propped between the tail of the two clamp arms (200), and the other end of the supporting rod (330) is inserted into the inner cylinder (320) and is provided with a limiting disc (332) propped against one end of the spring (340);

the bottom of the movable cylinder (310) is provided with a mounting shaft (313), the surface of the mounting shaft (313) is provided with threads, and the inner cylinder (320) is fixed on the mounting shaft (313) through the threads;

the air bag (400) is positioned in the outer cylinder (100) and behind the moving cylinder (310), the air bag (400) is connected with the air pump (500), and a skeleton ring (410) is arranged inside the air bag (400);

the outer cylinder (100) comprises a front cover (110), a middle cylinder (120) and a rear cover (130), wherein the front cover (110) and the rear cover (130) are respectively arranged at two ends of the middle cylinder (120), two clamp arms (200) are hinged with the front cover (110), and an air bag (400) is fixed on the rear cover (130).

2. The pressure-adjustable renal artery occlusion clamp of claim 1, wherein: the outer surface of the movable barrel (310) is provided with balls (312), the inner wall of the middle barrel (120) is provided with an axial ball groove (121), and the balls (312) are positioned in the ball groove (121).

3. The pressure-adjustable renal artery occlusion clamp of claim 2, wherein: the rear cover (130) is provided with a pressure relief valve (700), and the pressure relief valve (700) is communicated with the air bag (400).

4. The pressure-adjustable renal artery occlusion clamp of claim 3, wherein: the surface of the middle cylinder (120) is provided with an axial long groove (122), the adjusting assembly (300) further comprises a push button (350), and the bottom of the push button (350) penetrates through the long groove (122) to be connected with the moving cylinder (310).

5. The pressure-adjustable renal artery occlusion clip of claim 4, wherein: the device also comprises a limit screw (600), wherein the limit screw (600) is arranged on the middle cylinder (120); the outer surface of the movable barrel (310) is provided with a limiting convex ring (311), and the balls (312) are arranged on the limiting convex ring (311).

6. The pressure-adjustable renal artery occlusion clamp of claim 1, wherein: the air pump (500) is provided with a pressure gauge (510).

Images