Fluorescence laparoscopic liver resection puncture system and method with anti-reflux function

Abstract

The present invention discloses a fluorescent laparoscopic liver resection puncture system and method with anti-reflux function, including a puncture compound needle, the puncture compound needle comprises an injection end and a compound needle tube, wherein the needle head of the compound needle tube is detachably installed with an infrared emitter; the compound needle tube is composed of an inner tube and an outer tube and is fixedly installed inside the injection end, the needle head of the inner tube expands outward and fits with the inner wall of the outer tube to close the gap between the inner tube and the outer tube. In the present invention, a cylindrical infrared emitter is installed on the puncture compound needle, and the puncture compound needle can puncture into the abdominal cavity along this light spot, and the straight-line distance directly reaches the puncture guide hole of the B-ultrasound probe, so as to avoid or reduce the non-linear entry of the puncture needle into the abdominal cavity to the maximum extent, which is conducive to improving the success rate and reducing the trauma of repeated punctures; using a composite needle tube, fluorescent agent and embolic agent are injected successively in a single puncture channel process, and damaged blood vessels and bile ducts are blocked, reducing trauma and bleeding.

Description

Technical Field

[0001] The present invention relates to the field of medical technology, in particular to a fluorescent laparoscopic liver resection puncture system and method with anti-reflux function. Background Art

[0002] Hepatectomy is a surgical procedure used to treat liver disease. Depending on the specific situation, you can choose to remove part of the liver (partial resection) or the entire liver lobe (total hepatectomy). When removing part of the liver, it is necessary to mark the liver to be removed. The purpose of liver resection marking is mainly to help the surgical team accurately locate the position of the liver, the range of resection and important structures during the operation to ensure the safety and success of the operation.

[0003] During the marking process, a puncture needle is needed to puncture the liver and inject fluorescent agent into the target liver blood vessels. The puncture must pass through the liver parenchyma to reach the portal vein. Any blood vessels and bile ducts encountered may be punctured, which will have the corresponding risk of bleeding and bile fistula. Generally, B-ultrasound will guide to avoid the main visible and large ducts, but some small ducts may be difficult to avoid; guided by the B-ultrasound probe, after passing through the B-ultrasound guide hole, the needle tract that enters the liver is curved. In this way, after a puncture distance of more than ten centimeters, it is very likely that the needle tip will not reach the target blood vessel, but the side, causing complications such as puncture failure or bleeding. Summary of the invention

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide a fluorescent laparoscopic liver resection puncture system and method with anti-reflux function, which is inserted into the abdominal cavity through the laparoscopic trocar hole, can avoid or reduce the non-straight entry of the puncture needle into the abdominal cavity to the greatest extent, improve the success rate of the operation, reduce the trauma of repeated punctures, and use a composite needle tube, which can inject fluorescent agent and embolic agent successively during a single puncture channel.

[0005] In order to solve the background technical problems, the present invention adopts the following technical solutions:

[0006] A fluorescent laparoscopic liver resection puncture system with anti-reflux function comprises a puncture compound needle, wherein the puncture compound needle comprises an injection end and a compound needle tube, wherein the needle head of the compound needle tube is detachably equipped with an infrared emitter;

[0007] The composite needle tube is composed of an inner tube and an outer tube and is fixedly installed inside the injection end head. The needle head of the inner tube expands outward and fits with the inner wall of the outer tube to close the gap between the inner tube and the outer tube. The infrared emitter is detachably installed inside the outer tube and abuts against the needle head of the inner tube. The outer tube is provided with a discharge hole for the discharge of the embolic agent.

[0008] A partition plate is provided inside the injection end, wherein the internal cavity of the injection end is divided into a fluorescent agent injection cavity and an embolic agent injection cavity by the partition plate, the fluorescent agent injection cavity is connected to the interior of the inner tube, and the embolic agent injection cavity is connected to the gap between the inner tube and the outer tube.

[0009] As a further description of the above technical solution:

[0010] The gap between the inner tube and the outer tube is provided with a stabilizing ring for the gap therebetween. The number of the stabilizing rings is adaptively set according to the length of the composite needle tube. The stabilizing rings are provided with distributed liquid holes.

[0011] As a further description of the above technical solution:

[0012] The outer tube is provided with a silicone sleeve, one end of the silicone sleeve close to the needle is fixedly connected to the outer tube, and the other end is only in contact with the outer tube, and the discharge hole is provided on the inner side of the silicone sleeve and is wrapped and sealed by the silicone sleeve;

[0013] The silicone sleeve is located on the outer tube and close to one end of the needle head, and the fitting portion where the inner tube fits the outer tube is located on a side of the silicone sleeve away from the injection end;

[0014] An annular groove is provided on the outer tube, the silicone sleeve is located at the inner side of the annular groove, and an arc transition is adopted between the silicone sleeve and the end fixed to the outer tube.

[0015] As a further description of the above technical solution:

[0016] The infrared emitting head is in a cylindrical shape, and the end of the infrared emitting head is flush with the needle head of the composite needle tube, and the hollow part of the infrared emitting head is used for the fluorescent agent to pass through.

[0017] As a further description of the above technical solution:

[0018] The inner side of the infrared emitter is integrally formed with three convex strips, and one end of the convex strip close to the compound needle tube needle head has a three-millimeter gap with the compound needle tube needle head. The surface of the convex strip is smoothly arranged. The infrared emitter is inserted into the interior of the outer tube and fits closely with the outer tube.

[0019] As a further description of the above technical solution:

[0020] A pushing piston is slidably installed inside the fluorescent agent injection cavity and the embolic agent injection cavity, and a pushing rod is fixedly installed on the pushing piston. When the pushing pistons in the fluorescent agent injection cavity and the embolic agent injection cavity are pushed, the fluorescent agent and the embolic agent stored in the fluorescent agent injection cavity and the embolic agent injection cavity are injected.

[0021] As a further description of the above technical solution:

[0022] The fluorescent agent stored in the fluorescent agent injection cavity is indocyanine green;

[0023] The embolic agent stored in the embolic agent injection cavity is one of gelatin and NBCA glue.

[0024] The present invention also adopts:

[0025] The fluorescent laparoscopic liver resection puncture method with anti-reflux function is applied to the fluorescent laparoscopic liver resection puncture system with anti-reflux function, including B-ultrasound equipment, and the specific method is as follows:

[0026] S1, B-ultrasound equipment first scans the liver externally to determine its location;

[0027] S2. Draw a line to define the laparoscopic incision, open it, and inflate the patient's abdominal cavity to provide space for puncture marking;

[0028] S3. Replace the laparoscopic probe with the B-ultrasound device and enter the abdominal cavity through the laparoscopic hole to scan the liver and obtain the distribution images of the blood vessels and bile ducts inside the liver;

[0029] S4. A cylindrical infrared emitter is set on the puncture compound needle, which is inserted into the abdominal cavity through the laparoscope trocar hole and into the B-ultrasound puncture hole. The puncture compound needle punctures into the abdominal cavity along the irradiation light spot of the infrared emitter, and the straight-line distance reaches the puncture guide hole of the B-ultrasound probe;

[0030] S5. The puncture needle enters the portal vein in the liver, pushes the piston in the fluorescent agent injection cavity, injects indocyanine green fluorescent agent through the inner tube, and forms a vascular channel through the portal vein to mark the liver resection part;

[0031] S6. Push the piston that injects the embolic agent into the cavity. After the embolic agent passes through the gap between the inner tube and the outer tube, it is discharged from the discharge hole to form an embolism. The silicone sleeve limits the discharge direction of the embolic agent, blocks the target blood vessel and the vascular puncture site, and inhibits the backflow of the blood fluorescent agent.

[0032] S7. After marking is completed, the puncture needle is removed and liver resection surgery is performed.

[0033] As a further description of the above technical solution:

[0034] The injection of the embolic agent in step S6 simultaneously blocks the surrounding punctured blood vessels and bile duct during the puncture process to form an embolism.

[0035] Compared with the prior art, the advantages of the present invention are:

[0036] (1) In this scheme, the needle tip is matched with a tubular infrared transmitter head, which can be removed and inserted into the abdominal cavity through the laparoscope trocar hole and into the B-ultrasound puncture hole. The light of the infrared probe can be irradiated onto the abdominal wall, so that the puncture compound needle can puncture into the abdominal cavity along this light spot, and the straight-line distance directly reaches the puncture guide hole of the B-ultrasound probe, so as to minimize or reduce the non-linear entry of the puncture needle into the abdominal cavity, which is beneficial to improve the success rate and reduce the trauma of repeated punctures.

[0037] (2) This approach uses a composite needle that can sequentially inject fluorescent agents and embolic agents during a single puncture channel, thereby blocking damaged blood vessels and bile ducts during liver puncture, reducing trauma and bleeding. At the same time, the embolic agent is injected at the puncture point to form an embolism, avoiding or reducing fluorescence spillover, and preventing the fluorescence spillover from expanding the staining area, which makes it impossible to accurately identify the tumor staining area. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a structural schematic diagram of the present invention;

[0039] Figure 2 It is a schematic cross-sectional view of the composite needle tube needle of the present invention;

[0040] Figure 3 It is a cross-sectional structural schematic diagram of the injection end of the present invention;

[0041] Figure 4 It is a schematic diagram of the structure of the stabilizing ring of the present invention;

[0042] Figure 5 It is a schematic diagram of the puncture process of the present invention.

[0043] Description of the numbers in the figure:

[0044] 1. Puncture compound needle; 110. Injection end; 111. Partition plate; 112. Fluorescent agent injection cavity; 113. Embolic agent injection cavity; 114. Push piston; 120. Compound needle tube; 121. Inner tube; 122. Outer tube; 123. Discharge hole; 130. Silicone sleeve; 2. Infrared transmitter; 210. Raised strip; 3. Stabilizing ring; 310. Liquid hole. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0046] See also Figure 1-5 , the present invention provides embodiment 1:

[0047] The fluorescent laparoscopic liver resection puncture system with anti-reflux function comprises a puncture compound needle 1, characterized in that: the puncture compound needle 1 comprises an injection end 110 and a compound needle tube 120, wherein the needle head of the compound needle tube 120 is detachably mounted with an infrared emitter 2;

[0048] The light spot illuminated by the installed infrared transmitter head 2 can clearly determine the puncture direction of the needle tube of the puncture compound needle 1 before puncture, and can enter the abdominal cavity through the light spot of the infrared transmitter head 2, and directly reach the puncture guide hole of the B-ultrasound probe in a straight line, so as to facilitate maintaining the puncture direction of the puncture compound needle 1 during the operation, so as to minimize or reduce the non-straight entry of the puncture needle into the abdominal cavity, improve the accuracy of puncture, reduce the number of repeated punctures, and thus improve the success rate of puncture.

[0049] The composite needle tube 120 is composed of an inner tube 121 and an outer tube 122 and is fixedly installed inside the injection end 110. The needle head of the inner tube 121 expands outward and fits against the inner wall of the outer tube 122 to close the gap between the inner tube 121 and the outer tube 122. The infrared transmitter 2 is detachably installed inside the outer tube 122 and against the needle head of the inner tube 121. The outer tube 122 is provided with a discharge hole 123 for the outflow of the embolic agent; the gap between the inner tube 121 and the outer tube 122 is installed with a stabilizing ring 3 for the gap between the two. The number of stabilizing rings 3 is adaptively set according to the length of the composite needle tube 120, and the stabilizing ring 3 is provided with distributed liquid holes 310.

[0050] A partition plate 111 is provided inside the injection end 110, wherein the internal cavity of the injection end 110 is divided into a fluorescent agent injection cavity 112 and an embolic agent injection cavity 113 by the partition plate 111; the fluorescent agent injection cavity 112 is connected to the interior of the inner tube 121, and the embolic agent injection cavity 113 is connected to the gap between the inner tube 121 and the outer tube 122.

[0051] By improving the structure of the puncture compound needle 1, the inner tube 121 and the outer tube 122 form a double channel, and the fluorescent agent and the embolic agent can be injected successively in a single puncture path. The embolic agent can be injected during the puncture process. Because it is impossible to completely avoid the small blood vessels and bile ducts in the liver before the puncture compound needle 1 punctures into the portal vein, it is also easy to cause local small bleeding problems. During the injection process, the embolic agent is injected into the cavity 113 to form an embolism on the damaged position of the blood vessel or bile duct, reduce or avoid bleeding, and improve the safety of the puncture. At the same time, after puncturing into the portal vein, the fluorescent agent is injected through the inner tube 121, and the fluorescent agent is allowed to enter the liver resection site along the portal vein to complete the marking, and then the embolic agent is injected at the puncture point to form an embolism, avoid or reduce fluorescence spillover, and prevent fluorescence spillover from expanding the staining area, resulting in the inability to accurately identify the tumor staining area.

[0052] In the present invention, a silicone sleeve 130 is provided on the outer tube 122, and one end of the silicone sleeve 130 close to the needle is fixedly connected to the outer tube 122, and the other end is only in contact with the outer tube 122, and the discharge hole 123 is provided on the inner side of the silicone sleeve 130 and is wrapped and sealed by the silicone sleeve 130;

[0053] The silicone sleeve 130 is located on the outer tube 122 and close to one end of the needle head, and the fitting portion of the inner tube 121 fitting the outer tube 122 is located on a side of the silicone sleeve 130 away from the injection end 110 .

[0054] An annular groove is formed on the outer tube 122 , and the silicone sleeve 130 is located inside the annular groove. The silicone sleeve 130 and the end fixed to the outer tube 122 are connected by an arc transition.

[0055] The setting of the silicone sleeve can guide the discharge direction of the embolic agent discharged from the discharge hole 123, prevent the embolic agent from entering the portal vein or blocking the needle head of the inner tube, ensure the smooth injection of the fluorescent agent, and facilitate the injection of the embolic agent into the ruptured target blood vessel or bile duct to form embolism.

[0056] The provision of the annular groove can reduce the portion of the silicone sleeve 130 protruding from the outer tube 122 to a certain extent, and cooperate with the arc transition to facilitate the puncture entry of the puncture compound needle 1 and reduce obstacles.

[0057] The infrared emitting head 2 is cylindrical, and the end of the infrared emitting head 2 is flush with the needle head of the composite needle tube 120, and the hollow part of the infrared emitting head 2 is used for the fluorescent agent to pass through;

[0058] Among them, three convex strips 210 are integrally formed on the inner side of the infrared emitter head 2. The end of the convex strip 210 close to the needle head of the compound needle tube 120 has a three-millimeter gap with the needle head of the compound needle tube 120. The surface of the convex strip 210 is smoothly set. The infrared emitter head 2 is inserted into the interior of the outer tube 122 and fits tightly with the outer tube 122.

[0059] The cylindrical infrared emitting head 2 utilizes its hollow part to facilitate the passage of the fluorescent agent, and at the same time facilitates the infrared emitting head 2 to coincide with the puncture direction of the compound needle tube 120, accurately guiding the puncture process of the compound needle tube 120, and the three convex strips 210 provided can provide hook points when the infrared emitting head 2 needs to be replaced and disassembled, thereby facilitating the disassembly and replacement of the infrared emitting head 2.

[0060] In the present invention, a pushing piston 114 is slidably installed inside the fluorescent agent injection chamber 112 and the embolic agent injection chamber 113, and a pushing rod is fixedly installed on the pushing piston 114. When the pushing piston 114 in the fluorescent agent injection chamber 112 and the embolic agent injection chamber 113 is pushed, the fluorescent agent and the embolic agent stored in the fluorescent agent injection chamber 112 and the embolic agent injection chamber 113 are injected.

[0061] The fluorescent agent stored in the fluorescent agent injection cavity 112 is indocyanine green;

[0062] The embolic agent stored in the embolic agent injection cavity 113 is one of gelatin and NBCA glue.

[0063] See also Figure 1-5 , the present invention further provides Example 2 based on Example 1:

[0064] The fluorescent laparoscopic liver resection puncture method with anti-reflux function is applied to the fluorescent laparoscopic liver resection puncture system with anti-reflux function, including B-ultrasound equipment, and the specific method is as follows:

[0065] S1, B-ultrasound equipment first scans the liver externally to determine its location;

[0066] S2. Draw a line to define the laparoscopic incision, open it, and inflate the patient's abdominal cavity to provide space for puncture marking;

[0067] S3. Replace the laparoscopic probe with the B-ultrasound device and enter the abdominal cavity through the laparoscopic hole to scan the liver and obtain the distribution images of the blood vessels and bile ducts inside the liver;

[0068] S4, a cylindrical infrared emitter 2 is set on the puncture compound needle 1, which is inserted into the abdominal cavity through the laparoscope trocar hole and into the B-ultrasound puncture hole. The puncture compound needle 1 punctures into the abdominal cavity along the irradiated light spot of the infrared emitter 2, and the straight-line distance directly reaches the puncture guide hole of the B-ultrasound probe;

[0069] S5, the puncture needle enters the portal vein in the liver, pushes the push piston 114 in the fluorescent agent injection cavity 112, injects indocyanine green fluorescent agent through the inner tube 121, and forms a vascular channel through the portal vein to mark the liver resection part;

[0070] S6. Push the piston 114 in the embolic injection cavity 113. After the embolic agent passes through the gap between the inner tube 121 and the outer tube 122, it is discharged from the discharge hole 123 to form an embolism. The silicone sleeve 130 limits the discharge direction of the embolic agent, blocks the target blood vessel and the puncture site of the blood vessel, and inhibits the backflow of the blood fluorescent agent.

[0071] S7. After marking is completed, the puncture needle is removed and liver resection surgery is performed.

[0072] The injection of the embolic agent in step S6 simultaneously blocks the surrounding punctured blood vessels and bile duct during the puncture process to form an embolism.

[0073] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fluorescent laparoscopic liver resection puncture system with anti-reflux function, comprising a puncture compound needle (1), characterized in that: The puncture compound needle (1) comprises an injection end (110) and a compound needle tube (120), wherein the needle head of the compound needle tube (120) is detachably mounted with an infrared emitter (2); The composite needle tube (120) is composed of an inner tube (121) and an outer tube (122) and is fixedly installed inside the injection end head (110); the needle head of the inner tube (121) expands outward and fits with the inner wall of the outer tube (122) to close the gap between the inner tube (121) and the outer tube (122); the infrared emitting head (2) is detachably installed inside the outer tube (122) and abuts against the needle head of the inner tube (121); and the outer tube (122) is provided with a discharge hole (123) for discharging the embolic agent; A partition plate (111) is provided inside the injection end head (110), wherein the internal cavity of the injection end head (110) is divided into a fluorescent agent injection cavity (112) and an embolic agent injection cavity (113) by the partition plate (111), the fluorescent agent injection cavity (112) is connected to the inside of the inner tube (121), and the embolic agent injection cavity (113) is connected to the gap between the inner tube (121) and the outer tube (122); The outer tube (122) is provided with a silicone sleeve (130), one end of the silicone sleeve (130) close to the needle is fixedly connected to the outer tube (122), and the other end is only in contact with the outer tube (122), and the discharge hole (123) is provided on the inner side of the silicone sleeve (130) and is wrapped and sealed by the silicone sleeve (130); The silicone sleeve (130) is located on the outer tube (122) and close to one end of the needle head, and the fitting portion of the inner tube (121) fitting the outer tube (122) is located on a side of the silicone sleeve (130) away from the injection end (110); The outer tube (122) is provided with an annular groove, the silicone sleeve (130) is located on the inner side of the annular groove, and the silicone sleeve (130) and the end fixed to the outer tube (122) adopt an arc transition.

2. The fluorescent laparoscopic liver resection puncture system with anti-reflux function according to claim 1 is characterized by: The space between the inner tube (121) and the outer tube (122) is provided with a stabilizing ring (3) for the space therebetween. The number of the stabilizing rings (3) is adaptively set according to the length of the composite needle tube (120). The stabilizing ring (3) is provided with distributed liquid holes (310).

3. The fluorescent laparoscopic liver resection puncture system with anti-reflux function according to claim 1 is characterized by: The infrared emitting head (2) is cylindrical, and the end of the infrared emitting head (2) is flush with the needle head of the composite needle tube (120); the hollow portion of the infrared emitting head (2) is used for the fluorescent agent to pass through.

4. The fluorescent laparoscopic liver resection puncture system with anti-reflux function according to claim 1, characterized in that: Three convex strips (210) are integrally formed on the inner side of the infrared emitting head (2), and one end of the convex strip (210) close to the needle head of the compound needle tube (120) has a three-millimeter gap with the needle head of the compound needle tube (120). The surface of the convex strip (210) is smoothly arranged. The infrared emitting head (2) is inserted into the interior of the outer tube (122) and is closely fitted with the outer tube (122).

5. The fluorescent laparoscopic liver resection puncture system with anti-reflux function according to claim 1, characterized in that: A pushing piston (114) is slidably mounted inside the fluorescent agent injection chamber (112) and the embolic agent injection chamber (113), and a pushing rod is fixedly mounted on the pushing piston (114). When the pushing piston (114) in the fluorescent agent injection chamber (112) and the embolic agent injection chamber (113) is pushed, the fluorescent agent and the embolic agent stored in the fluorescent agent injection chamber (112) and the embolic agent injection chamber (113) are injected.

6. The fluorescence laparoscopic liver resection puncture system with anti-reflux function according to claim 1, characterized in that: The fluorescent agent stored in the fluorescent agent injection cavity (112) is indocyanine green; the embolic agent stored in the embolic agent injection cavity (113) is one of gelatin and NBCA glue.

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