Balloon dilator for retroperitoneal laparoscopic surgery

Abstract

The invention discloses a balloon dilator for a retroperitoneal laparoscopic surgery. The balloon dilator comprises a dilation balloon, an infusion tube, a connecting tube and an injector, a connector is arranged at the rear end of the infusion tube to be connected with the connecting tube, an expansion balloon is integrally formed on the infusion tube, and partition layers are arranged on the infusion tube in an array mode to divide the expansion balloon into four cavities. One end of the connecting pipe is connected with the joint, and the other end is connected with the injector; the joint comprises a square frame and a control rod; the front side and the rear side of the square frame are in sealed connection with the infusion tube and the connecting tube respectively. Through holes are formed in the four sides of the square frame in an arrayed mode and slidably connected with control rods. A cross rod is arranged at the bottom of the square frame; a sliding rod is arranged in the middle of the cross rod; the lower end of the sliding rod is provided with a conical seat, the upper end of the sliding rod is integrally provided with a hemisphere, and the sliding rod is slidably connected with a transition piece; a first elastic element is arranged on the upper portion of the control rod to be connected with the square frame, a round hole is formed in the control rod, and square hole installation wedge blocks are formed in the side wall of the round hole in an array mode.

Description

Technical Field

[0001] The invention belongs to the technical field of medical auxiliary instruments, and in particular relates to a balloon dilator for retroperitoneal laparoscopic surgery. Background Art

[0002] Laparoscopic surgery is a minimally invasive surgical technique that involves making several small holes in the abdomen, inserting a laparoscope and other surgical instruments, and using a laparoscopic endoscope, intraperitoneal lighting, and an electronic camera system to complete the surgery inside the body. The expansion balloon is an important medical device for laparoscopic surgery. During the operation, the expansion balloon is used to expand the retroperitoneal or extraperitoneal cavity to create sufficient operating space for the operation and ensure the surgical field of view.

[0003] However, the expansion balloon of the prior art has the following technical problems:

[0004] 1. The expansion balloon of the existing technology cannot accurately control the expansion volume of the balloon, and completely relies on the subjective judgment of medical staff in the laparoscopic feedback field, which easily leads to excessive or insufficient expansion space, affecting the normal progress of the operation and the rapid recovery of the patient in the later stage;

[0005] 2. The expansion balloon of the prior art is an overall expansion and its expansion direction cannot be controlled. It is easy to squeeze the non-surgical organs in the patient's body during the expansion process.

[0006] In summary, the present invention discloses a balloon dilator for retroperitoneal laparoscopic surgery, which assists in the directional expansion of a dilation balloon and accurately controls the expansion volume, thereby ensuring that the laparoscopic surgery is performed quickly and efficiently. Summary of the invention

[0007] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0008] A balloon dilator for retroperitoneal laparoscopic surgery, comprising: a dilating balloon, an infusion tube, a connecting tube, and a syringe;

[0009] A joint is provided at the rear end of the infusion tube to connect the connecting tube, an expansion balloon is integrally formed on the infusion tube, and a partition layer is arranged in an array on the infusion tube to divide the expansion balloon into four cavities;

[0010] One end of the connecting tube is connected to the joint, the other end is connected to the syringe, and a branch tube is arranged in the middle of the connecting tube;

[0011] The joint comprises: a square frame and a control rod; the front and rear sides of the square frame are respectively sealed and connected with the infusion tube and the connecting tube; the four sides of the square frame are provided with through holes in an array for sliding connection with the control rod; the bottom of the square frame is provided with a cross bar; the middle of the cross bar is provided with a sliding rod; the lower end of the sliding rod is provided with a cone seat, the upper end of the sliding rod is provided with a hemisphere, and the sliding rod is slidably connected with a transition piece;

[0012] The control rod is provided with an elastic element 1 connected to a square frame on the upper part, a circular hole is provided inside the control rod, and a square hole array is provided on the side wall of the circular hole to install a wedge block; a straight rod extends from the lower end of the control rod, and a cover plate is provided on the straight rod for control; an elastic element 2 is provided on the wedge block to connect to the inner wall of the square hole;

[0013] Furthermore, the outer wall of the syringe is provided with scale lines; the maximum capacity of the syringe is 500 ml;

[0014] Furthermore, the interior of the infusion tube is divided into four infusion cavities; a liquid outlet is provided at the end of the infusion cavity to communicate with the four cavities inside the expansion balloon, and a liquid inlet connection joint is provided at the head end of the infusion cavity;

[0015] Furthermore, a sealing layer is provided on the cover plate to abut against the plane of the end of the infusion tube, and the sealing layer abuts against the end of the infusion tube to lock the rotation of the control rod in the through hole;

[0016] Further, the control rod is sealed and connected to the through hole;

[0017] Furthermore, the diameter of the hemisphere is greater than twice the diameter of the sliding rod; a conical groove is provided at the lower end of the hemisphere to movably connect the frustum;

[0018] Furthermore, the transition piece is composed of two frustums spliced ​​together, and when the frustum at the upper part of the transition piece is inserted into the interior of the hemisphere, the center surface of the transition piece is flush with the lower end surface of the hemisphere; the maximum diameter of the transition piece is equal to the diameter of the hemisphere;

[0019] Furthermore, when the elastic element 2 is in a normal extension state, the front end of the wedge block coincides with the axis of the hemisphere;

[0020] Furthermore, a one-way valve is provided at the end of the branch pipe.

[0021] The beneficial effects of the present invention are:

[0022] The present invention designs a balloon dilator for retroperitoneal laparoscopic surgery, comprising: a dilating balloon, an infusion tube, a connecting tube, and a syringe; in actual use, in the initial state, a sealing plate on a joint seals all liquid inlets, gas is extracted through a syringe, and physiological liquid is injected into the dilating balloon through the connecting tube; the dilating direction of the dilating balloon is determined by the cooperation of an endoscope, and the corresponding cavity inside the dilating balloon is determined to correspond to the dilating direction of the dilating balloon, and the opening and closing of the liquid inlet is controlled by pressing a control rod connected to the liquid inlet at the rear end of the infusion cavity connected to the corresponding cavity, so as to inject physiological gas into the dilating direction cavity of the dilating balloon, and control the dilating balloon to expand in a desired direction;

[0023] In the present invention, a joint is provided, and four control rods on the joint are used to control the up and down movement of the sealing cover, control the opening and closing of the four infusion cavities inside the infusion tube, and control the gas delivery inside the four cavities inside the expansion balloon, so as to realize unilateral expansion, synchronous expansion of both sides, or overall expansion of the expansion balloon, thereby solving the problem in the prior art that the expansion balloon is an overall expansion and its expansion direction cannot be controlled, and the non-surgical organs in the patient's body are easily squeezed during the expansion process;

[0024] In the present invention, a syringe is provided to inject gas into the expansion balloon, and the injection amount of the physiological gas can be accurately controlled by the syringe, thereby controlling the expansion volume of the expansion balloon in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below.

[0026] Figure 1 It is an overall schematic diagram of a balloon dilator for retroperitoneal laparoscopic surgery;

[0027] Figure 2 It is a schematic diagram of the structure of a balloon dilator after the dilation balloon is removed in retroperitoneal laparoscopic surgery;

[0028] Figure 3 It is a partially enlarged structural schematic diagram of a balloon dilator for retroperitoneal laparoscopic surgery A;

[0029] Figure 4 It is a schematic diagram of the partial cross-sectional structure of a balloon dilator for retroperitoneal laparoscopic surgery;

[0030] Figure 5 It is a partially enlarged structural schematic diagram of a balloon dilator for retroperitoneal laparoscopic surgery B;

[0031] Figure 6 It is a partial cross-sectional structural diagram of a balloon dilator for retroperitoneal laparoscopic surgery;

[0032] Figure 7 It is a partially enlarged structural schematic diagram of a balloon dilator for retroperitoneal laparoscopic surgery C;

[0033] Figure 8 It is a partially enlarged structural schematic diagram C1 of a balloon dilator for retroperitoneal laparoscopic surgery.

[0034] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0035] 1- expansion balloon, 2- infusion tube, 201- separation layer, 202- liquid outlet, 203- liquid inlet,

[0036] 3-joint, 301-square frame, 3011-through hole, 30111-cross bar, 3012-sliding bar, 30121-

[0037] Hemisphere, 301211-conical groove, 30122-conical seat, 3013-transition piece, 302-control rod, 3021-elastic element one, 3022-sealing cover, 30221-sealing layer, 3023-square hole, 3024-wedge block, 30241-elastic element two, 4-syringe, 5-connecting tube, 501-branch pipe, 502-check valve. DETAILED DESCRIPTION

[0038] The present invention discloses a balloon dilator for retroperitoneal laparoscopic surgery, aiming to solve the problem in the prior art that the expansion volume and expansion direction of the expansion balloon 1 are difficult to control, and the surgical organs are easily squeezed, thus affecting the surgical operation.

[0039] The balloon dilator for retroperitoneal laparoscopic surgery of the present invention comprises: a dilating balloon 1, an infusion tube 2, a connecting tube 5, and a syringe 4;

[0040] A connector 3 is provided at the rear end of the infusion tube 2 to connect to the connecting tube 5. An expansion balloon 1 is integrally formed on the infusion tube 2, and a partition layer 201 is arranged in an array on the infusion tube 2 to divide the expansion balloon 1 into four cavities.

[0041] One end of the connecting tube 5 is connected to the joint 3, and the other end is connected to the syringe 4. A branch tube 5 is arranged in the middle of the connecting tube 5;

[0042] The joint 3 comprises: a square frame 301 and a control rod 302; the front and rear sides of the square frame 301 are respectively sealed and connected with the infusion tube 2 and the connecting tube 5; the four sides of the square frame 301 are provided with through holes 3011 in an array and slidably connected with the control rod 302; a cross bar 30111 is provided at the bottom of the square frame 301; a sliding rod 3012 is provided in the middle of the cross bar 30111; a cone seat 30122 is provided at the lower end of the sliding rod 3012, a hemisphere 30121 is integrally provided at the upper end of the sliding rod 3012, and a transition piece 3013 is slidably connected to the sliding rod 3012;

[0043] The control rod 302 is provided with an elastic element 1 3021 on the upper part thereof to connect with the square frame 301; a circular hole is provided inside the control rod 302; a square hole 3023 is provided in the array of the side wall of the circular hole to install a wedge block 3024; a straight rod is extended from the lower end of the control rod 302; a cover plate is provided on the straight rod for control; an elastic element 2 30241 is provided on the wedge block 3024 to connect with the inner wall of the square hole 3023;

[0044] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0045] Example 1

[0046] like Figure 1-8 The figure shows a schematic structural diagram of a balloon dilator for retroperitoneal laparoscopic surgery of the present invention. In the present invention, a dilating balloon 1, an infusion tube 2, a connecting tube 5, and a syringe 4 are provided;

[0047] A connector 3 is provided at the rear end of the infusion tube 2 to connect to the connecting tube 5. An expansion balloon 1 is integrally formed on the infusion tube 2, and a partition layer 201 is arranged in an array on the infusion tube 2 to divide the expansion balloon 1 into four cavities.

[0048] One end of the connecting tube 5 is connected to the joint 3, and the other end is connected to the syringe 4. A branch tube 5 is arranged in the middle of the connecting tube 5;

[0049] The joint 3 comprises: a square frame 301 and a control rod 302; the front and rear sides of the square frame 301 are respectively sealed and connected with the infusion tube 2 and the connecting tube 5; the four sides of the square frame 301 are provided with through holes 3011 in an array and slidably connected with the control rod 302; a cross bar 30111 is provided at the bottom of the square frame 301; a sliding rod 3012 is provided in the middle of the cross bar 30111; a cone seat 30122 is provided at the lower end of the sliding rod 3012, a hemisphere 30121 is integrally provided at the upper end of the sliding rod 3012, and a transition piece 3013 is slidably connected to the sliding rod 3012;

[0050] The control rod 302 is provided with an elastic element 1 3021 on the upper part thereof to connect with the square frame 301; a circular hole is provided inside the control rod 302; a square hole 3023 is provided in the array of the side wall of the circular hole to install a wedge block 3024; a straight rod is extended from the lower end of the control rod 302; a cover plate is provided on the straight rod for control; an elastic element 2 30241 is provided on the wedge block 3024 to connect with the inner wall of the square hole 3023;

[0051] In this embodiment, the outer wall of the syringe 4 is provided with scale lines; the maximum capacity of the syringe 4 is 500 ml, and the balloon expansion volume can be known by observing the gas input amount inside the syringe 4, so as to solve the problem that it is difficult to grasp the balloon expansion volume in the prior art, and the problem that the expansion space is too large or insufficient and the normal operation and the rapid recovery of the patient in the later stage are easily affected by the subjective judgment of the medical staff under the field of view of the laparoscope.

[0052] In this embodiment, the interior of the infusion tube 2 is divided into four infusion cavities; the end of the infusion cavity is provided with a liquid outlet 202 connected to the four cavities inside the expansion balloon 1, and the head end of the infusion cavity is provided with a liquid inlet 203 connected to the joint 3. By dividing the expansion balloon 1 into four cavities, and the gas input inside the four cavities is input separately without affecting each other, by controlling the gas input inside the four cavities, unilateral expansion can be achieved, and gas is injected into the cavity corresponding to the required expansion direction to achieve unilateral directional expansion of the expansion balloon 1. The unilateral expansion has a total of four directions, which can completely cover the operating space required for the entire operation, and the unilateral expansion of the balloon can prevent the expansion balloon 1 in the other three directions from expanding and squeezing the organs;

[0053] On the other hand, synchronous expansion of both sides can also be achieved, and the synchronous expansion of both sides includes injecting gas into the two contralateral cavities to drive the expansion balloon 1 to expand, and injecting gas into the two adjacent cavities to drive the expansion balloon 1 to expand; injecting gas into the two contralateral cavities to drive the expansion balloon 1 to expand, and both sides expand synchronously to ensure the expansion area of ​​the expansion balloon 1. Here, taking the injection of gas into the left and right cavities to drive the expansion balloon 1 to expand as an example, the injection of gas into the left and right cavities drives the expansion balloon 1 to expand synchronously to both sides to ensure the lateral expansion area of ​​the expansion balloon 1, and avoid squeezing or excessive squeezing of the organs on the upper and lower sides;

[0054] The gas injected into the two adjacent cavities drives the expansion balloon 1 to expand, thereby ensuring the expansion thickness of the expansion balloon 1;

[0055] Finally, gas can be injected into all cavities to achieve overall expansion with the same function as the expansion balloon 1 in the prior art;

[0056] In this embodiment, a joint 3 is provided to control the infusion and stop of gas in the four cavities inside the expansion balloon 1; the specific structural diagram of the joint 3 can be referred to Figure 3-8 ;

[0057] In this embodiment, a sealing layer 30221 is provided on the cover plate to abut against the plane of the end of the infusion tube 2, and the sealing layer 30221 abuts against the end of the infusion tube 2 to lock the rotation of the control rod 302 in the through hole 3011;

[0058] In this embodiment, the control rod 302 is sealed and connected to the through hole 3011;

[0059] In this embodiment, the diameter of the hemisphere 30121 is greater than twice the diameter of the sliding rod 3012; a conical groove 301211 is provided at the lower end of the hemisphere 30121 to flexibly connect with the frustum;

[0060] In this embodiment, the transition piece 3013 is composed of two frustums. When the frustum at the upper part of the transition piece 3013 is inserted into the hemisphere 30121, the center surface of the transition piece 3013 is flush with the lower end surface of the hemisphere 30121. The maximum diameter of the transition piece 3013 is equal to the diameter of the hemisphere 30121.

[0061] In this embodiment, when the second elastic element 30241 is in a normal extension state, the front end of the wedge block 3024 coincides with the axis of the hemisphere 30121;

[0062] In this embodiment, a branch pipe 5 is provided in the middle of the connecting pipe 5, and a one-way valve 502 is provided at the end of the branch pipe 5. The branch pipe 5 and the one-way valve 502 are provided to facilitate rapid exhaust when assisting in taking out the expansion balloon 1.

[0063] In this embodiment, the wedge block 3024 is driven to move downward by pressing the control rod 302, and the wedge block 3024 contacts the outer wall of the hemisphere 30121, and the outer wall of the hemisphere 30121 squeezes the wedge block 3024, so that the wedge block 3024 retracts into the square hole 3023. When the wedge block 3024 moves to the lower end of the hemisphere 30121, the sealing cover 3022 aligns with the liquid inlet 203 to seal the liquid inlet 203, and the elastic element 30241 ejects the wedge block 3024, and the lower end surface of the hemisphere 30121 limits the sliding back of the wedge block 3024, thereby completing the closure of the liquid inlet 203.

[0064] The control rod 302 is pressed again to drive the wedge block 3024 to move. The wedge block 3024 abuts the transition block. The cone at the upper part of the transition block squeezes the wedge block 3024, causing the wedge block 3024 to retract into the square hole 3023. When the wedge block 3024 moves to the lower part of the transition block, the elastic element 2 30241 pops out the wedge block 3024. Under the action of the elastic element 1 3021, the wedge block 3024 presses the transition piece 3013 and moves upward. When the upper part of the wedge block 3024 is embedded in the hemisphere 30121, the cone at the lower part of the wedge block 3024 squeezes the wedge block 3024, causing the wedge block 3024 to retract into the square hole 3023. The wedge block 3024 is separated from the transition piece 3013. The control rod 302 is reset under the action of the elastic element 1 3021, the sealing cover 3022 is separated from the liquid inlet 203, and the liquid inlet 203 is opened.

[0065] In summary, the present invention designs a balloon dilator for retroperitoneal laparoscopic surgery, and is provided with a joint 3. The four control rods 302 on the joint 3 control the up and down movement of the sealing cover 3022, control the opening and closing of the four infusion cavities inside the infusion tube 2, and control the gas delivery inside the four cavities inside the expansion balloon 1, so as to realize unilateral expansion, synchronous expansion of both sides, or overall expansion of the expansion balloon 1, thereby solving the problem in the prior art that the expansion balloon 1 is an overall expansion and its expansion direction cannot be controlled, and the non-surgical organs in the patient's body are easily squeezed during the expansion process;

[0066] In the present invention, a syringe 4 is provided to inject gas into the expansion balloon 1 , and the injection amount of the physiological gas can be accurately controlled by the syringe 4 , thereby controlling the expansion volume of the expansion balloon 1 in real time.

[0067] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only the specific implementation methods described.

Claims

1. A balloon dilator for retroperitoneal laparoscopic surgery, characterized in that: include: Dilatation balloon, infusion tube, connecting tube, syringe; A joint is provided at the rear end of the infusion tube to connect the connecting tube, the infusion tube is integrally formed with an expansion balloon, and a partition layer is arranged in an array on the infusion tube to divide the expansion balloon into four cavities; One end of the connecting tube is connected to a joint, and the other end is connected to a syringe; The joint comprises: a square frame and a control rod; the front and rear sides of the square frame are respectively sealed and connected with the infusion tube and the connecting tube; the four sides of the square frame are provided with through holes in an array for sliding connection with the control rod; the bottom of the square frame is provided with a cross bar; the middle of the cross bar is provided with a sliding rod; the lower end of the sliding rod is provided with a cone seat, the upper end of the sliding rod is provided with a hemisphere, and the sliding rod is slidably connected with a transition piece; An elastic element 1 connected to a square frame is arranged on the upper part of the control rod, a circular hole is arranged inside the control rod, and a square hole array is arranged on the side wall of the circular hole to install a wedge block; a straight rod extends from the lower end of the control rod, and a cover plate is arranged on the straight rod for control; an elastic element 2 connected to the inner wall of the square hole is arranged on the wedge block.

2. A balloon dilator for retroperitoneal laparoscopic surgery according to claim 1, characterized in that: The outer wall of the syringe is provided with scale lines; the maximum capacity of the syringe is 1-2L.

3. The balloon dilator for retroperitoneal laparoscopic surgery according to claim 1, characterized in that: The interior of the infusion tube is divided into four infusion cavities; a liquid outlet is arranged at the end of the infusion cavity to communicate with the four cavities inside the expansion balloon, and a liquid inlet connecting joint is arranged at the head end of the infusion cavity.

4. The balloon dilator for retroperitoneal laparoscopic surgery according to claim 1, characterized in that: The cover plate is provided with a sealing layer abutting against the plane of the end of the infusion tube, and the sealing layer abuts against the end of the infusion tube to lock the rotation of the control rod in the through hole.

5. The balloon dilator for retroperitoneal laparoscopic surgery according to claim 1, characterized in that: The control rod is sealed and connected to the through hole.

6. The balloon dilator for retroperitoneal laparoscopic surgery according to claim 1, characterized in that: The diameter of the hemisphere is greater than twice the diameter of the sliding rod; a conical groove is provided at the lower end of the hemisphere to movably connect with the frustum.

7. The balloon dilator for retroperitoneal laparoscopic surgery according to claim 1, characterized in that: The transition piece is composed of two frustums spliced ​​together. When the frustum on the upper part of the transition piece is inserted into the hemisphere, the center surface of the transition piece is flush with the lower end surface of the hemisphere; the maximum diameter of the transition piece is equal to the diameter of the hemisphere.

8. The balloon dilator for retroperitoneal laparoscopic surgery according to claim 1, characterized in that: When the elastic element 2 is in a normal extension state, the front end of the wedge block coincides with the axis of the hemisphere.

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