Intraperitoneal hyperthermic perfusion indwelling catheter fixation device

Abstract

This invention relates to a fixation device for an indwelling catheter used in intraperitoneal hyperthermic perfusion, comprising a fixing block, a first fixing part, a second fixing part, a shaft, a blade, and a baffle. The fixing block has a through hole connecting its upper and lower sides. The upper side of the fixing block is recessed downwards to form an arc-shaped groove for accommodating the upper part of the indwelling catheter and a connecting groove. The center of the arc-shaped groove is located on the axis of the through hole. One end of the connecting groove is connected to one end of the arc-shaped groove, and the other end is connected to the upper end of the through hole. When the upper end of the indwelling catheter is pulled upwards, the wall of the indwelling catheter pushes the baffle to rotate. The baffle drives the shaft and the blade to rotate, and the blade's cutting edge rotates towards the through hole and sweeps across the location of the through hole. Due to the adoption of the above technical solution, this invention can reduce the possibility of abdominal puncture site tearing, bleeding, and organ damage when patients attempt to remove the catheter unplannedly and forcefully.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a device for fixing an indwelling catheter for intraperitoneal hyperthermic perfusion. Background Technology

[0002] Hyperthermic intraperitoneal chemotherapy (HIPEC) is an adjuvant therapy for peritoneal malignancies. HIPEC has unique efficacy in the prevention and treatment of metastatic peritoneal malignancies such as gastric cancer, colorectal cancer, ovarian cancer, pseudomyxoma peritonei, malignant peritoneal mesothelioma, liver cancer, cholangiocarcinoma, and pancreatic cancer, as well as their associated malignant ascites.

[0003] Before intraperitoneal hyperthermic chemotherapy (HPCEC), a puncture is performed in the patient's abdomen to insert four indwelling catheters, part of which is located inside the abdominal cavity and part outside. During HPCEC, all four catheters are connected to the HPCEC machine. Two catheters allow the medication to enter the patient's abdominal cavity, while the other two allow the medication to drain out of the abdominal cavity, thus circulating the medication between the HPCEC machine and the patient's abdominal cavity. After one HPCEC cycle, the catheters are disconnected, and all four catheters remain in place on the patient's abdominal wall for subsequent HPCEC cycles.

[0004] Currently, indwelling catheters are fixed to the patient's abdominal wall using sutures and nano-silver dressings. The indwelling catheter placed in the patient's abdomen can cause discomfort. Some patients with poor compliance may try to pull out the catheter themselves without planning or force, which may cause tearing of the puncture site, bleeding and leakage, or even organ damage. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a fixation device for intraperitoneal hyperthermic perfusion catheter to solve the technical problem that when some patients with poor compliance remove the catheter by themselves without planning or force, it may cause tearing of the puncture site in the patient's abdomen, bleeding and leakage, or even organ damage.

[0006] This invention is achieved through the following technical solution: A device for fixing an indwelling catheter for intraperitoneal hyperthermic perfusion is disclosed. The device includes a fixing block, a first fixing part, a second fixing part, a shaft, a blade, and a baffle. The fixing block has a through hole connecting its upper and lower sides. The upper side of the fixing block is recessed downward to form an arc-shaped groove for accommodating the upper part of the indwelling catheter and a connecting groove. The center of the arc-shaped groove is located on the axis of the through hole. One end of the connecting groove is connected to one end of the arc-shaped groove, and the other end is connected to the upper end of the through hole. A rotating cavity is also formed inside the fixing block. The upper side of the fixing block is recessed downward to form a shaft hole. The first fixing part is used to fix the fixing block to the patient's abdominal wall. The second fixing part is located on the lower side of the rotating cavity. The second fixing part is used to fix and connect the fixing block and the indwelling catheter. The shaft is rotatably fitted in the shaft hole. The blade is located in the rotating cavity. The blade is fixedly connected to the shaft. One end of the baffle is fixedly connected to the shaft, and the other end extends horizontally to the side of the arc groove away from the through hole. When the upper end of the indwelling catheter is pulled upward, the wall of the indwelling catheter pushes the baffle to rotate. The baffle drives the shaft and the blade to rotate, and the blade rotates toward the through hole and sweeps across the location of the through hole.

[0007] Furthermore, the outer surface of the fixing block is recessed inward to form two threaded grooves. The two threaded grooves are arranged coaxially, and the axis of the threaded grooves intersects perpendicularly with the axis of the through hole. The inner end surfaces of the two threaded grooves are recessed inward to form a channel. The channel is located on the lower side of the rotating cavity and connects to the through hole. The second fixing part includes two threaded posts and two fixing rods. The two threaded posts are threadedly connected to the two threaded grooves in a one-to-one correspondence. The two fixing rods are located in the two channels in a one-to-one correspondence. The outer ends of the two fixing rods abut against the two threaded posts in a one-to-one correspondence. The inner ends of the two fixing rods are recessed to form a locking groove. The groove wall of the locking groove is an arc surface that matches the outer peripheral surface of the indwelling catheter. The groove wall of the locking groove is fixed to the outer peripheral surface of the indwelling catheter by adhesive.

[0008] Furthermore, the wall of the lower end of the through hole is sealed to the wall of the indwelling catheter, and the outer circumferential surface of the shaft is sealed to the wall of the shaft hole. The upper part of the through hole wall expands outward to form a mounting groove. The bottom wall of the mounting groove is located on the upper side of the rotating cavity. A corrugated hose is provided in the mounting groove. The lower end of the corrugated hose is fixedly connected to the bottom wall of the mounting groove. The inner side of the upper end of the corrugated hose is a conical surface that is larger at the top and smaller at the bottom.

[0009] Furthermore, the two opposite sidewalls of the arc-shaped groove away from the connecting groove are both grooved to form strip grooves. The two strip grooves are directly opposite each other and are both arranged vertically in the length direction. A rubber strip is fixed in each of the two strip grooves, and a slot is formed between the upper end face of the rubber strip and the upper sidewall of the strip groove. The arc-shaped groove is provided with a metal strip, the two ends of which are respectively located in two slots, and the metal strip cooperates with the slots.

[0010] Furthermore, the metal strip presses the indwelling conduit against the bottom wall of the arc-shaped groove; The bottom wall of the arc-shaped groove is recessed downwards to form a circular groove corresponding to the position of the metal strip. A conductive metal ring is fixed inside the circular groove, and a plastic rod is placed inside the conductive metal ring. The upper end of the plastic rod abuts against the indwelling conduit, and a conductive metal sheet is fixed at the lower end of the plastic rod. The edge of the conductive metal sheet protrudes from the edge of the lower end face of the plastic rod and is located below the conductive metal ring. A helical spring is also provided in the receiving groove. The lower end of the helical spring abuts against the bottom wall of the receiving groove, and the upper end of the helical spring abuts against the conductive metal sheet. It also includes an alarm and a power supply. The negative terminal of the alarm is electrically connected to the negative terminal of the power supply, the positive terminal of the alarm is electrically connected to the conductive metal sheet, and the positive terminal of the power supply is electrically connected to the conductive metal ring.

[0011] Furthermore, a mounting cavity is formed within the fixing block, and a sound hole is formed on one wall of the mounting cavity, the sound hole communicating with the outer surface of the fixing block. The power source is a button battery, and both the alarm and the button battery are located within the mounting cavity.

[0012] Furthermore, the fixing block is cylindrical, and multiple ball sockets are formed on the outer peripheral surface of the fixing block. Each ball socket contains a ball, which cooperates with the ball socket. A portion of the ball protrudes from the outer peripheral surface of the fixing block, and the volume of the portion of the ball protruding from the outer peripheral surface of the fixing block is less than half the volume of the ball.

[0013] Furthermore, the lower side of the fixing block is recessed upward to form a placement groove.

[0014] Furthermore, the first fixing part includes an adhesive piece, the center of which is formed with a mounting hole, the fixing block is located inside the mounting hole, and the outer side of the fixing block is fixedly connected to the wall of the mounting hole.

[0015] The beneficial effects of this invention are as follows: When fixing an indwelling catheter using the peritoneal hyperthermic perfusion catheter fixation device described in this invention, the fixation block remains fixed to the patient's abdominal wall from the moment the patient begins to pull the catheter upwards until the severed portion of the catheter is pulled off the fixation block. The portion of the indwelling catheter located between the rotating cavity and the surface of the patient's abdominal wall remains fixedly connected to the fixation block, while the portion of the indwelling catheter inside the puncture site and the portion inside the abdominal cavity is hardly moved. This reduces the possibility of puncture site tearing, bleeding, and organ damage in cases where patients attempt to remove the catheter themselves using unplanned force.

[0016] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the intraperitoneal hyperthermic perfusion indwelling catheter fixation device of the present invention; Figure 2 for Figure 1 Enlarged view of point a in the middle; Figure 3 This is a top view of the intraperitoneal hyperthermic perfusion catheter fixation device of the present invention; Figure 4 for Figure 3 Enlarged view of point b in the middle; Figure 5 for Figure 3 AA section view; Figure 6 for Figure 3 BB section view; Figure 7 for Figure 3 CC section view; Figure 8 for Figure 7 Enlarged view of point c in the middle; Figure 9 for Figure 3 DD sectional view; Figure 10 This is a front view of the intraperitoneal hyperthermic perfusion indwelling catheter fixation device of the present invention; Figure 11 for Figure 10 EE sectional view; Figure 12 This is a schematic diagram of the fixing rod in the intraperitoneal hyperthermic perfusion catheter fixation device of the present invention.

[0018] In the diagram: Fixing block-1; Shaft-2; Blade-3; Baffle-4; Indwelling conduit-5; Arc groove-6; Connecting groove-7; Rotating cavity-8; Threaded column-9; Fixing rod-10; Snap-in groove-11; First sealing ring-12; Second sealing ring-13; Mounting groove-14; Corrugated hose-15; Rubber strip-16; Metal strip-17; Circular groove-18; Conductive metal ring-19; Plastic rod-20; Conductive metal sheet-21; Helical spring-22; Alarm-23; Power supply-24; Mounting cavity-25; Sound hole-26; Ball bearing-27; Knife groove-28; Placement groove-29; Adhesive piece-30. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the above description of the present invention, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is conventionally placed during use. These terms are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0024] Please see Figure 1-12 The present invention provides a technical solution: a fixation device for an indwelling catheter for intraperitoneal hyperthermic perfusion, comprising a fixing block 1, a first fixing part, a second fixing part, a shaft 2, a blade 3, and a baffle 4. The fixing block 1 has a through hole connecting the upper and lower sides of the fixing block 1. The upper side of the fixing block 1 is recessed downward to form an arc-shaped groove 6 for accommodating the upper part of the indwelling catheter 5 and a connecting groove 7. The center of the arc-shaped groove 6 is located on the axis of the through hole. One end of the connecting groove 7 is connected to one end of the arc-shaped groove 6, and the other end is connected to the upper end of the through hole. A rotating cavity 8 is also formed inside the fixing block 1. The upper side of the fixing block 1 is recessed downward to form a shaft hole. The first fixing part is used to fix the fixing block 1 to the patient's abdominal wall. The second fixing part is located on the lower side of the rotating cavity 8. The second fixing part is used to fix the fixing block 1 and the indwelling catheter 5. The shaft 2 is rotatably fitted in the shaft hole. The blade 3 is located in the rotating cavity 8. The blade 3 is fixedly connected to the shaft 2. One end of the baffle 4 is fixedly connected to the shaft 2, and the other end extends horizontally to the side of the arc groove 6 away from the through hole. When the upper end of the indwelling catheter 5 is pulled upward, the wall of the indwelling catheter 5 pushes the baffle 4 to rotate. The baffle 4 drives the shaft 2 and the blade 3 to rotate. The blade 3 rotates toward the through hole and sweeps across the position of the through hole.

[0025] In this design, the through hole is located within the range of the rotating cavity 8, and a portion of the lower end of the shaft hole is located within the rotating cavity 8. When the shaft 2 drives the blade 3 to rotate, the through hole is located within the range that the blade 3 can rotate and cover within the rotating cavity 8.

[0026] Before inserting the indwelling catheter 5 into the patient's abdominal wall, the end of the indwelling catheter 5 intended for insertion into the patient's abdominal cavity is inserted into the arc-shaped groove 6 and passes through the underside of the baffle 4. Then, the end of the indwelling catheter 5 intended for insertion into the patient's abdominal cavity is moved along the arc-shaped groove 6, so that the end of the indwelling catheter 5 intended for insertion into the patient's abdominal cavity passes through the connecting groove 7 and the through hole in sequence and continues to move downward until the fixing block 1 is located at the end of the indwelling catheter 5 intended for connection to the thermochemotherapy perfusion machine, so that the fixing block 1 has almost no impact on the installation operation of the indwelling catheter 5 on the patient's abdominal wall.

[0027] Then, the end of the indwelling catheter 5 that is used to be inserted into the patient's abdominal cavity is inserted into the patient's abdominal cavity through a puncture site on the abdominal wall. Then, the indwelling catheter 5 is fixed using existing fixation methods, namely suture fixation and nano-silver dressing fixation.

[0028] Then, the fixing block 1 is moved along the indwelling catheter 5 towards the patient's abdominal wall. After the fixing block 1 moves along the indwelling catheter 5 to the position on the patient's abdominal wall, the first fixing part fixes the indwelling catheter 5 to the patient's abdominal wall. At this time, the fixing block 1 covers the puncture site and the nano-silver dressing. Then, the second fixing part is used to fix the portion of the indwelling catheter 5 located between the rotating cavity 8 and the surface of the patient's abdominal wall to the fixing block 1. At this point, the installation of the indwelling catheter 5 and the peritoneal hyperthermic perfusion indwelling catheter fixing device of the present invention on the patient's abdominal wall is completed.

[0029] After installation, a portion of the indwelling conduit 5 is located in the arc-shaped groove 6, the connecting groove 7, and the through hole, with the portion of the indwelling conduit 5 located in the arc-shaped groove 6 located on the lower side of the baffle 4.

[0030] In subsequent instances where patients attempt to remove the catheter unplanned and forcefully, i.e., when the patient pulls upwards (towards the patient's abdominal wall) at the end of the indwelling catheter 5 that is connected to the thermochemotherapy perfusion machine, the portion of the indwelling catheter 5 located within the arc-shaped groove 6 can be gradually pulled upwards. During this process, the indwelling catheter 5 will exert a component force on the baffle 4 in the direction of the connecting groove 7. The indwelling catheter 5 pushes the baffle 4 in the direction of the connecting groove 7, causing the baffle 4 to rotate and drive the shaft 2 and the blade 3 to rotate. The blade 3 rotates towards the through hole and cuts the indwelling catheter 5. When the indwelling catheter 5 is cut off, the blade has completely swept across the location of the through hole.

[0031] After the indwelling catheter 5 was cut, as the patient continued to pull on the indwelling catheter 5, the portion of the indwelling catheter 5 located above the cut position was gradually pulled off.

[0032] During the process from when the patient begins to pull upwards on the indwelling catheter 5 until the severed portion of the indwelling catheter 5 is pulled off the fixing block 1, the fixing block 1 remains fixed to the patient's abdominal wall. The portion of the indwelling catheter 5 located between the rotating cavity 8 and the surface of the patient's abdominal wall remains fixedly connected to the fixing block 1. The portion of the indwelling catheter 5 located within the puncture site and the portion within the abdominal cavity is hardly moved. This reduces the possibility of puncture site tearing, bleeding, and organ damage in cases where patients attempt to remove the catheter themselves using unplanned force.

[0033] Furthermore, the peritoneal hyperthermic perfusion indwelling catheter fixation device of the present invention is an additional fixation structure added to the existing method of fixing the indwelling catheter 5. Without changing the existing structure and fixation method of the indwelling catheter 5, it can reduce the possibility of puncture site tearing, bleeding and exudation, and organ damage in patients who attempt to remove the catheter unplannedly. No additional design of a new structure for the indwelling catheter 5 is required.

[0034] In this embodiment, the outer surface of the fixing block 1 is recessed inward to form two threaded grooves. The two threaded grooves are arranged on the same axis. The axis of the threaded grooves intersects the axis of the through hole perpendicularly. The inner end surfaces of the two threaded grooves are recessed inward to form a channel. The channel is located on the lower side of the rotating cavity 8 and the channel is connected to the through hole. The second fixing part includes two threaded posts 9 and two fixing rods 10. The two threaded posts 9 are threadedly connected to the two threaded grooves in a one-to-one correspondence. The two fixing rods 10 are located in the two channels in a one-to-one correspondence. The outer ends of the two fixing rods 10 abut against the two threaded posts 9 in a one-to-one correspondence. The inner ends of the two fixing rods 10 are recessed to form a locking groove 11. The groove wall of the locking groove 11 is an arc surface adapted to the outer peripheral surface of the indwelling catheter 5. The groove wall of the locking groove 11 is fixed to the outer peripheral surface of the indwelling catheter 5 by adhesive.

[0035] When the intraperitoneal hyperthermic perfusion indwelling catheter fixation device of the present invention is in its initial state, the two fixing rods 10 are located outside the two channels, and the two threaded posts 9 are located outside the two threaded grooves.

[0036] When it is necessary to use the second fixing part to fix the part of the indwelling catheter 5 located between the rotating cavity 8 and the patient's abdominal wall surface to the fixing block 1, glue is applied to the groove walls of the slots 11 on both fixing rods 10. Then, the two fixing rods 10 are inserted into the two holes one by one, and the two fixing rods 10 are pushed in the direction of the through hole using a rod-shaped tool, such as a screwdriver, so that the groove walls of the slots 11 on the two fixing rods 10 abut against the outer peripheral surface of the indwelling catheter 5 in the through hole. Then, the two threaded posts 9 are screwed into the two threaded grooves one by one until the two threaded posts 9 abut against the ends of the two fixing rods 10 facing away from the through hole. At this time, the two fixing rods 10 cannot move away from the indwelling catheter 5, and the groove walls of the slots 11 on the two fixing rods 10 remain against the outer peripheral surface of the indwelling catheter 5. After the glue on the groove wall of the insertion groove 11 solidifies and dries, the outer peripheral surface of the indwelling catheter 5 can be firmly fixed to the groove wall of the insertion groove 11, and the part of the indwelling catheter 5 located below the fixed position can hardly be pulled upward. With this structure, the second fixing part can fix the fixing block 1 and the indwelling catheter 5, and the fixing stability is good and the fixing is convenient.

[0037] In this embodiment, the wall of the lower end of the through hole is sealed to the wall of the indwelling conduit 5, and the outer circumferential surface of the shaft 2 is sealed to the wall of the shaft hole. Specifically, the lower end of the through hole has a recessed wall forming a first sealing groove, and a first sealing ring 12 is provided in the first sealing groove. The first sealing ring 12 is interference-fitted with the first sealing groove, and the indwelling conduit 5 is interference-fitted with the inner cavity of the first sealing ring 12. With this structure, the lower end of the through hole and the wall of the indwelling conduit 5 can be sealed.

[0038] The bore wall of the shaft hole is recessed to form a second sealing groove, and a second sealing ring 13 is provided in the second sealing groove. The second sealing ring 13 is interference-fitted with the second sealing groove, and the shaft 2 is interference-fitted with the inner cavity of the first sealing ring 12. With this structure, the outer circumferential surface of the shaft 2 and the bore wall of the shaft hole can be sealed. Furthermore, the second sealing ring 13 is tightened within the second sealing groove, and the shaft 2 is tightened within the second sealing ring 13. There is a large frictional resistance between the second sealing ring 13 and the groove wall of the second sealing groove, and between the shaft 2 and the second sealing ring 13, which prevents the shaft 2 from rotating freely within the shaft hole. A certain amount of force is required to rotate the shaft 2, which reduces the possibility of the blade 3 accidentally rotating and cutting the indwelling catheter 5 in the through hole. Both the first sealing ring 12 and the second sealing ring 13 are rubber sealing rings.

[0039] The upper part of the through hole wall expands outward to form a mounting groove 14. The bottom wall of the mounting groove 14 is located on the upper side of the rotating cavity 8. A corrugated hose 15 is provided in the mounting groove. The lower end of the corrugated hose 15 is fixedly connected to the bottom wall of the mounting groove. The inner side of the upper end of the corrugated hose 15 is a conical surface that is larger at the top and smaller at the bottom.

[0040] After the patient is extubated for the first time, it can be determined that the patient has poor compliance. During subsequent treatment, the patient can be restrained using existing restraint devices or by having a caregiver closely monitor the patient to prevent the patient from being extubated again.

[0041] The corrugated hose 15 is elastic and can be stretched. After the indwelling catheter 5 is cut by the blade 3 and the cut portion is pulled off the fixing block 1, the upper end of the corrugated hose 15 is pulled upward from the mounting groove 14. Then, the cut portion of the indwelling catheter 5 is reinserted into the corrugated hose 15. A rope is then tied to a corrugated groove at the upper part of the corrugated hose 15, and the upper part of the corrugated hose 15 is tied and fixed to the cut portion of the indwelling catheter 5. Then, glue is dripped into the gap between the corrugated hose 15 and the outer circumference of the indwelling catheter 5 from the upper end of the corrugated hose 15. After the glue solidifies and dries, the cut portion of the indwelling catheter 5 is fixedly connected to the corrugated hose 15, and the gap between the corrugated hose 15 and the cut portion of the indwelling catheter 5 is sealed by the glue.

[0042] At this point, the portion of the indwelling catheter 5 cut off by the blade 3, the corrugated tubing 15, and the portion of the indwelling catheter 5 remaining on the patient's abdomen reassemble to form an irrigation pathway, allowing for continued intraperitoneal hyperthermic perfusion. Because the indwelling catheter 5 is cut off, it is not necessary to remove the portion of the indwelling catheter 5 from the patient's abdominal wall or reinstall it, further reducing harm to the patient.

[0043] The inner surface of the upper end of the corrugated hose 15 is a conical surface that is larger at the top and smaller at the bottom, so that there is a large gap between the upper end of the corrugated hose 15 and the outer peripheral surface of the cut part of the indwelling catheter 5, which makes it easy to drip glue into the gap between the corrugated hose 15 and the outer peripheral surface of the indwelling catheter 5 through the upper end of the corrugated hose 15.

[0044] In this embodiment, the two opposite sidewalls of the arc-shaped groove 6 away from the connecting groove 7 are grooved to form strip grooves. The two strip grooves are directly opposite each other and are both arranged vertically in the length direction. A rubber strip 16 is fixed in both strip grooves. A slot is formed between the upper end face of the rubber strip 16 and the upper sidewall of the strip groove. The arc-shaped groove 6 is provided with a metal strip 17, the two ends of which are located in two slots respectively, and the metal strip 17 cooperates with the slots.

[0045] When the portion of the indwelling catheter 5 located above the arc-shaped groove 6 is slightly and accidentally pulled upwards, the metal strip 17 can block the portion of the indwelling catheter 5 located within the arc-shaped groove 6 and below the metal strip 17, preventing the portion of the indwelling catheter 5 located within the arc-shaped groove 6 from being easily pulled upwards. When the indwelling catheter 5 is slightly and accidentally pulled upwards, it can reduce the possibility that the indwelling catheter 5 will push the baffle 4, shaft 2, and blade 3 to rotate, and can reduce the possibility that the portion of the indwelling catheter 5 located within the through hole will be accidentally cut.

[0046] When some patients attempt to remove the catheter unplanned by force, under a large pulling force, the indwelling catheter 5 is located in the arc-shaped groove 6, and the part located below the metal strip 17 squeezes the metal strip 17 upward. The middle part of the metal strip 17 bends upward, and the two ends of the metal strip 17 rotate downward. The straight distance between the two ends of the metal strip 17 becomes shorter. Finally, the straight distance between the two ends of the metal strip 17 is no greater than the width of the arc-shaped groove 6, and the metal strip 17 is pulled out of the arc-shaped groove 6.

[0047] In cases where patients attempt to remove the catheter unplanned and forcefully, the metal strip 17 can create a barrier, potentially causing the patient to abandon further removal efforts. Only if the patient ignores the barrier of the metal strip 17 and continues to remove the catheter can the indwelling catheter 5 push the baffle 4, shaft 2, and blade 3 to rotate and cut off the portion of the indwelling catheter 5 located within the through-hole. This reduces the likelihood of the indwelling catheter 5 being cut off, and also reduces the need for subsequent operations to connect the cut portion of the indwelling catheter 5 to the corrugated tubing 15. This makes the intraperitoneal hyperthermic perfusion indwelling catheter fixation device of the present invention more convenient to use.

[0048] In this embodiment, the metal strip 17 presses the indwelling catheter 5 against the bottom wall of the arc-shaped groove 6; The bottom wall of the arc-shaped groove 6 is recessed downward to form a circular groove 18 corresponding to the position of the metal strip 17. A conductive metal ring 19 is fixed inside the circular groove 18, and a plastic rod 20 is provided inside the conductive metal ring 19. The upper end of the plastic rod 20 abuts against the indwelling conduit 5, and a conductive metal sheet 21 is fixed at the lower end of the plastic rod 20. The edge of the conductive metal sheet 21 protrudes from the edge of the lower end face of the plastic rod 20. The conductive metal sheet 21 is located below the conductive metal ring 19. A helical spring 22 is also provided in the receiving groove. The lower end of the helical spring 22 abuts against the bottom wall of the receiving groove, and the upper end of the helical spring 22 abuts against the conductive metal sheet 21. It also includes an alarm 23 and a power supply 24. The negative terminal of the alarm 23 is electrically connected to the negative terminal of the power supply 24, the positive terminal of the alarm 23 is electrically connected to the conductive metal sheet 21, and the positive terminal of the power supply 24 is electrically connected to the conductive metal ring 19.

[0049] When the metal strip 17 is not pulled out from the arc groove 6, the portion of the indwelling conduit 5 located below the metal strip 17 presses against the plastic rod 20, the spiral spring 22 is in a compressed state, the conductive metal sheet 21 is not in contact with the conductive metal ring 19, and at this time the alarm 23 is in a power-off state and will not sound an alarm.

[0050] When the metal strip 17 is pulled out of the arc-shaped groove 6, the portion of the indwelling catheter 5 that holds the plastic rod 20 is pulled out of the arc-shaped groove 6. The plastic rod 20 loses the pressure of the indwelling catheter 5, the helical spring 22 elastically resets, and pushes the conductive metal piece 21 and the plastic rod 20 upwards until the conductive metal piece 21 abuts against the conductive metal ring 19. At this point, the alarm 23 is powered on and the power 24 sounds an alarm. This alarm serves to remind the patient not to continue removing the catheter and also to alert caregivers or medical staff who are not paying attention to the patient removing the catheter. Upon hearing the alarm, caregivers or medical staff can prevent the patient from pulling the indwelling catheter 5 upwards, reducing the possibility of the indwelling catheter 5 being cut by the blade 3 and reducing the likelihood of subsequent operations to connect the cut portion of the indwelling catheter 5 to the corrugated tubing 15. This makes the intraperitoneal hyperthermic perfusion indwelling catheter fixation device of the present invention more convenient to use.

[0051] In this embodiment, a mounting cavity 25 is formed inside the fixing block 1, and a sound hole 26 is formed on one wall of the mounting cavity 25. The sound hole 26 communicates with the outer surface of the fixing block 1. The power supply 24 is a button battery. The alarm 23 and the button battery are both located inside the mounting cavity 25.

[0052] With this structure, the alarm 23 and power supply 24 can be integrated into the fixing block 1, making the structure of the intraperitoneal hyperthermic perfusion indwelling catheter fixing device of the present invention neater, and also reducing the possibility of the alarm 23 being damaged by the patient. The alarm sound emitted by the alarm 23 can be transmitted from the mounting cavity 25 through the sound hole 26.

[0053] In this embodiment, the fixing block 1 is cylindrical, and a plurality of ball sockets are formed on the outer peripheral surface of the fixing block 1. Each ball socket is provided with a ball 27, which cooperates with the ball socket. A portion of the ball 27 protrudes from the outer peripheral surface of the fixing block 1, and the volume of the portion of the ball 27 protruding from the outer peripheral surface of the fixing block 1 is less than half the volume of the ball 27.

[0054] Since the volume of the portion of the ball 27 protruding from the outer periphery of the fixing block 1 is less than half the volume of the ball 27, and the volume of the portion of the ball 27 located inside the socket is larger than the volume of the portion of the ball 27 located outside the socket, the ball 27 will not come out of the socket.

[0055] If the patient pinches the fixing block 1 and pulls it upward, the patient's fingers will most likely be supported on the ball bearing 27. A small rolling friction will be formed between the patient's fingers and the ball bearing 27, making it easy for the patient's fingers to slip off the fixing block 1. This can reduce the pulling force of the patient on the fixing block 1 and reduce the possibility of the fixing block 1 being pulled off the patient's abdominal wall.

[0056] In this design, the length of the threaded post 9 is less than the depth of the threaded groove, and the end face of the threaded post 9 facing away from the through hole is recessed to form a groove 28 for inserting a screwdriver tip. Inserting the screwdriver tip into the groove 28 and rotating the screwdriver will rotate the threaded post 9, allowing it to fully enter the threaded groove. When the patient pinches and pulls the fixing block 1, the threaded post 9 will not become a point of leverage for the patient's fingers.

[0057] In this embodiment, the lower side of the fixing block 1 is recessed upward to form a placement groove 29. After the fixing block 1 is fixed to the patient's abdominal wall by the first fixing part, the puncture site and the nano-silver dressing are both located in the placement groove 29, and the fixing block 1 will not compress the puncture site or the nano-silver dressing on the patient's abdomen.

[0058] In this embodiment, the first fixing part includes an adhesive patch 30, the adhesive patch 30 having a mounting hole in its center, the fixing block 1 located within the mounting hole, and the outer side of the fixing block 1 fixedly connected to the wall of the mounting hole. The adhesive patch 30 can be adhered and fixed to the patient's abdominal wall; with this structure, the first fixing part can fix the fixing block 1 to the patient's abdominal wall.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A device for fixing an indwelling catheter for intraperitoneal hyperthermic perfusion, characterized in that: A fixation device for an indwelling catheter used for intraperitoneal hyperthermic perfusion includes a fixing block, a first fixing part, a second fixing part, a shaft, a blade, and a baffle. The fixing block has a through hole connecting its upper and lower sides. The upper side of the fixing block is recessed downward to form an arc-shaped groove for accommodating the upper part of the indwelling catheter and a connecting groove. The center of the arc-shaped groove is located on the axis of the through hole. One end of the connecting groove is connected to one end of the arc-shaped groove, and the other end is connected to the upper end of the through hole. A rotating cavity is also formed inside the fixing block, and the upper side of the fixing block is recessed downward to form a shaft hole. The first fixing part is used to fix the fixing block to the patient's abdominal wall. The second fixing part is located on the lower side of the rotating cavity. The second fixing part is used to fix and connect the fixing block and the indwelling catheter. The shaft is rotatably fitted in the shaft hole. The blade is located in the rotating cavity. The blade is fixedly connected to the shaft. One end of the baffle is fixedly connected to the shaft, and the other end extends horizontally to the side of the arc groove away from the through hole. When the upper end of the indwelling catheter is pulled upward, the wall of the indwelling catheter pushes the baffle to rotate. The baffle drives the shaft and the blade to rotate, and the blade rotates toward the through hole and sweeps across the location of the through hole.

2. The intraperitoneal hyperthermic perfusion catheter fixation device according to claim 1, characterized in that: The outer surface of the fixing block is recessed inward to form two threaded grooves. The two threaded grooves are arranged on the same axis. The axis of the threaded grooves intersects the axis of the through hole perpendicularly. The inner end surfaces of the two threaded grooves are recessed inward to form a channel. The channel is located on the lower side of the rotating cavity and connects to the through hole. The second fixing part includes two threaded posts and two fixing rods. The two threaded posts are threadedly connected to the two threaded grooves in a one-to-one correspondence. The two fixing rods are located in the two channels in a one-to-one correspondence. The outer ends of the two fixing rods abut against the two threaded posts in a one-to-one correspondence. The inner ends of the two fixing rods are recessed to form a locking groove. The groove wall of the locking groove is an arc surface that matches the outer peripheral surface of the indwelling catheter. The groove wall of the locking groove is fixed to the outer peripheral surface of the indwelling catheter by adhesive.

3. The intraperitoneal hyperthermic perfusion catheter fixation device according to claim 1, characterized in that: The wall of the lower end of the through hole is sealed to the wall of the indwelling catheter, and the outer circumferential surface of the shaft is sealed to the wall of the shaft hole. The upper part of the through hole wall expands outward to form a mounting groove. The bottom wall of the mounting groove is located on the upper side of the rotating cavity. A corrugated hose is provided in the mounting groove. The lower end of the corrugated hose is fixedly connected to the bottom wall of the mounting groove. The inner side of the upper end of the corrugated hose is a conical surface that is larger at the top and smaller at the bottom.

4. The intraperitoneal hyperthermic perfusion catheter fixation device according to claim 1, characterized in that: The two opposite sidewalls of the arc-shaped groove away from the connecting groove are grooved to form strip grooves. The two strip grooves are directly opposite each other and are both arranged vertically along their length. A rubber strip is fixed in each of the two strip grooves, and a slot is formed between the upper end face of the rubber strip and the upper sidewall of the strip groove. The arc-shaped groove is provided with a metal strip, the two ends of which are respectively located in two slots, and the metal strip cooperates with the slots.

5. The intraperitoneal hyperthermic perfusion catheter fixation device according to claim 4, characterized in that: The metal strip presses the indwelling conduit against the bottom wall of the arc-shaped groove; The bottom wall of the arc-shaped groove is recessed downwards to form a circular groove corresponding to the position of the metal strip. A conductive metal ring is fixed inside the circular groove, and a plastic rod is placed inside the conductive metal ring. The upper end of the plastic rod abuts against the indwelling conduit, and a conductive metal sheet is fixed at the lower end of the plastic rod. The edge of the conductive metal sheet protrudes from the edge of the lower end face of the plastic rod and is located below the conductive metal ring. A helical spring is also provided in the receiving groove. The lower end of the helical spring abuts against the bottom wall of the receiving groove, and the upper end of the helical spring abuts against the conductive metal sheet. It also includes an alarm and a power supply. The negative terminal of the alarm is electrically connected to the negative terminal of the power supply, the positive terminal of the alarm is electrically connected to the conductive metal sheet, and the positive terminal of the power supply is electrically connected to the conductive metal ring.

6. The intraperitoneal hyperthermic perfusion catheter fixation device according to claim 5, characterized in that: An installation cavity is formed within the fixing block, and a sound hole is formed on one wall of the installation cavity, which communicates with the outer surface of the fixing block. The power source is a button battery, and both the alarm and the button battery are located within the installation cavity.

7. The intraperitoneal hyperthermic perfusion catheter fixation device according to claim 1, characterized in that: The fixing block is cylindrical, and multiple ball sockets are formed on the outer peripheral surface of the fixing block. Each ball socket contains a ball ball, which cooperates with the ball socket. A portion of the ball ball protrudes from the outer peripheral surface of the fixing block, and the volume of the portion of the ball ball protruding from the outer peripheral surface of the fixing block is less than half the volume of the ball ball.

8. The intraperitoneal hyperthermic perfusion catheter fixation device according to claim 1, characterized in that: The lower side of the fixing block is recessed upward to form a placement groove.

9. The intraperitoneal hyperthermic perfusion catheter fixation device according to claim 1, characterized in that: The first fixing part includes an adhesive piece, the center of which is formed with a mounting hole. The fixing block is located inside the mounting hole, and the outer side of the fixing block is fixedly connected to the wall of the mounting hole.

Images