Debridement device for human body pathological tissue

Abstract

A debridement device for human body pathological tissue, comprising an insertion tube, a rotary cutting head and an operating handle. The insertion tube comprises an inner tube and an outer tube fitted outside the inner tube; an aspiration cavity is formed in the inner tube, and an irrigation cavity is formed between the inner tube and the outer tube; the rotary cutting head comprises a housing and a rotary cutting blade arranged in the housing; the interior of the housing is communicated with the aspiration cavity; a rotary cutting opening exposing the rotary cutting blade is formed on the housing; a notch corresponding to the rotary cutting opening is formed on the outer tube; the operating handle is connected to the insertion tube and the rotary cutting head so as to control the rotary cutting blade to cut human tissue at the rotary cutting opening, suction debris by means of the aspiration cavity, and use the irrigation cavity to flush the position where the rotary cutting head is located. The device can carry out both rotary cutting and aspiration on human body pathological tissue, reduce residues of necrotic tissue, effectively protect surrounding normal tissues and blood vessels, reduce the possibility that a patient requires repeated surgery, and improve the efficiency, effect and safety of minimally invasive therapy.

Description

A debridement device for human diseased tissue Technical Field

[0001] The present invention relates to the field of medical devices, in particular to the field of interventional medical devices, and specifically to a debridement device for human diseased tissue. Background Art

[0002] Acute pancreatitis (AP) is a common digestive disease. Most patients experience mild, self-limited symptoms. However, 15%-25% of AP patients will progress to severe acute pancreatitis (SAP), accompanied by pancreatic and surrounding tissue necrosis and systemic multi-organ failure, with a mortality rate as high as 10%-30%. A large proportion of deaths in patients with severe pancreatitis are due to infection associated with peripancreatic necrotic material that is difficult to clear during the necrotic infection phase. Timely and effective removal of necrotic and infected material from the pancreas and surrounding tissues is a key factor in determining treatment efficacy. In recent years, with the advancement of minimally invasive techniques, some patients can avoid the more invasive need for open surgery and instead choose minimally invasive procedures such as percutaneous catheter drainage (PCD), minimally invasive retroperitoneal pancreatic necrosectomy (MARPN), and laparoscopic-assisted drainage, minimizing tissue damage and complications. The minimally invasive treatment options currently adopted clinically are mainly to locate the abscess cavity with the assistance of laparoscopy, perform percutaneous drainage to initially drain the necrotic fluid, then open the abscess cavity and use long foreign body forceps and aspirators to remove necrotic tissue and pus.

[0003] However, because the necrotic tissue in acute pancreatitis is fragile and difficult to remove with clamps, and the thick pus easily clogs the suction device, the debridement effect is often poor, and the residual necrotic tissue cannot be completely removed, inevitably requiring a second or even multiple surgeries. This increases the patient's painful experience, affects the patient's treatment effect, prolongs the patient's hospitalization time, and imposes a heavy economic burden. At the same time, the process of clamping and suctioning the necrotic tissue may damage large blood vessels and cause massive bleeding. Therefore, there is an urgent need for a safe and efficient surgical instrument for removing necrotic infected tissue in acute pancreatitis.

[0004] Summary of the Invention

[0005] The present invention provides a debridement device for diseased human tissue, which can simultaneously achieve rotary excision and suction removal of diseased human tissue, reduce residual necrotic matter, and effectively protect surrounding normal tissue and blood vessels, reducing the possibility of patients requiring repeated surgery, and improving the efficiency, effectiveness and safety of minimally invasive treatment.

[0006] The present invention provides a debridement device for diseased human tissue, comprising an insertion tube, a rotary cutting head and an operating handle, the insertion tube comprising an inner tube and an outer tube sleeved outside the inner tube, a dirt suction chamber formed in the inner tube, and a flushing chamber formed between the inner tube and the outer tube, the rotary cutting head comprising a shell and a rotary cutting head arranged in the shell, the interior of the shell being communicated with the dirt suction chamber, a rotary cutting opening for exposing the rotary cutting head being formed on the shell, and a notch corresponding to the rotary cutting opening being formed on the outer tube, the operating handle being connected to the insertion tube and the rotary cutting head for controlling the rotary cutting head to cut human tissue at the rotary cutting opening, to absorb dirt from the dirt suction chamber, and to flush the rotary cutting head through the flushing chamber.

[0007] Furthermore, the rotary cut is arranged on the side of the shell, and the top of the shell is a blind end and is arc-shaped.

[0008] Furthermore, a negative pressure suction port is provided on the operating handle, and the end of the suction chamber away from the rotary cutting head is connected to the negative pressure suction port, and the suction bottle and the suction device form negative pressure in the suction chamber through the negative pressure suction port.

[0009] Furthermore, the rotary cutting cutter head is rotatably arranged in the housing around its own axis.

[0010] Furthermore, the rotary cutting head includes a rotating shaft, one end of the rotating shaft is connected to the rotary cutting head, and the other end is connected to the driving component in the operating handle, and the driving component drives the rotary cutting head to rotate through the rotating shaft.

[0011] Furthermore, a partition is provided between the inner tube and the outer tube to divide the flushing cavity into a first flushing channel and a second flushing channel, the opening of the first flushing channel away from the end of the operating handle is opened at the end of the rotary cutting head close to the insertion tube, and is located at the position of the rotary cutting opening on the shell, the end of the outer tube away from the operating handle and the shell are not closed, the second flushing channel is formed between the outer tube and the side wall of the shell at the rotary cutting head, and the opening of the second flushing channel is opened at the end of the shell away from the end of the operating handle.

[0012] Furthermore, the two ends of the outer tube are flush with the upper and lower ends of the shell at positions where the rotary cut is not provided.

[0013] Furthermore, a plurality of connecting holes connecting the dirt suction chamber and the flushing chamber are provided on the inner tube, and a flow direction control structure is provided on the connecting holes to allow flushing liquid to enter the dirt suction chamber from the flushing chamber in one direction.

[0014] Furthermore, a bending portion and a guide wire connected to the bending portion are provided on the insertion tube. The bending portion is provided at a position of the insertion tube close to the rotary cutting head. The bending portion is connected to the guide wire control structure on the operating handle through the guide wire. The length of the guide wire is controlled by the operating handle to control the degree of bending of the bending portion.

[0015] Furthermore, the guidewire control structure includes a rotating gear, the guidewire is wound around the rotating gear, and a fixing structure for fixing the rotation angle of the rotating gear is provided on the rotating gear.

[0016] In summary, in the present invention, when performing debridement of diseased tissue in the human body, the debridement device for diseased tissue in the human body can be inserted into the location of the diseased tissue through the laparoscopic surgical opening, and the position of the rotary incision can be made to correspond to the diseased tissue. Then, the rotary cutting head is controlled by the operating handle to cut the diseased tissue in the human body. While cutting, the rotary incision and the surrounding area are flushed through the flushing cavity, and the cut diseased tissue and the sewage and other wastes after flushing are sucked out through the suction cavity to complete the debridement of the diseased tissue in the human body. The above-mentioned device can simultaneously realize the rotary cutting and suction removal of diseased tissue in the human body, reduce the residual necrotic matter, and effectively protect the surrounding normal tissues and blood vessels, reduce the possibility of patients needing repeated operations, and improve the efficiency, effect and safety of minimally invasive treatment.

[0017] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG1 is a schematic structural diagram of a device for debridement of human diseased tissue according to an embodiment of the present invention.

[0019] FIG2 is a schematic structural diagram of the rotary cutting head in FIG1 .

[0020] FIG3 is a schematic structural diagram of the shell of the rotary cutting head in FIG2 .

[0021] FIG4 is a schematic structural diagram of the rotary cutting head at the rotary cutting head in FIG2 .

[0022] FIG5 is a schematic structural diagram showing the rotary cutting head and the insertion tube in FIG1 after being combined.

[0023] FIG6 is a schematic structural diagram of the first flushing channel in FIG5 .

[0024] FIG. 7 is a schematic structural diagram of the second flushing channel in FIG. 5 .

[0025] FIG8 is a schematic diagram showing the cross-sectional structure of the joint between the operating handle and the insertion tube. DETAILED DESCRIPTION

[0026] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the following is a detailed description with reference to the accompanying drawings and preferred embodiments.

[0027] The present invention provides a debridement device for diseased human tissue, which can simultaneously achieve rotary excision and suction removal of diseased human tissue, reduce residual necrotic matter, and effectively protect surrounding normal tissue and blood vessels, reducing the possibility of patients requiring repeated surgery, and improving the efficiency, effectiveness and safety of minimally invasive treatment.

[0028] FIG1 is a schematic diagram of the structure of a debridement device for diseased human tissue provided by an embodiment of the present invention, FIG2 is a schematic diagram of the structure of the rotary cutting head in FIG1 , FIG3 is a schematic diagram of the structure of the shell of the rotary cutting head in FIG2 , and FIG4 is a schematic diagram of the structure of the rotary cutting head of the rotary cutting head in FIG2 (for ease of presentation, part of the shell structure is omitted in FIG4 ). As shown in FIG1 to FIG4 , the debridement device for diseased human tissue provided by an embodiment of the present invention includes an insertion tube 10, a rotary cutting head 20, and an operating handle 30. The insertion tube 10 includes an inner tube 11 and an outer tube 12 that is sleeved outside the inner tube 11, a dirt suction chamber 13 is formed in the inner tube 11, and a flushing chamber 14 is formed between the inner tube 11 and the outer tube 12. The rotary cutting head 20 includes a housing 21 and a rotary cutting head 22 disposed within the housing 21. The interior of the housing 21 communicates with the suction chamber 13 of the inner tube 11. A rotary cutting opening 23 is formed in the housing 21 to expose the rotary cutting head 22. A notch corresponding to the rotary cutting opening 23 is formed in the outer tube 12, allowing the rotary cutting head 22 to directly contact human tissue. An operating handle 30 is connected to the insertion tube 10 and the rotary cutting head 20 and is used to control the rotary cutting head 20 to cut human tissue at the rotary cutting opening 23, draw waste from the suction chamber 13, and flush the rotary cutting head 20 through the flushing chamber 14.

[0029] In this embodiment, when performing debridement of diseased tissue in a human body, the debridement device for diseased tissue in a human body can be inserted into the location of the diseased tissue through the laparoscopic surgical opening, and the position of the rotary cut 23 is made to correspond to the diseased tissue. Then, the rotary cut head 20 is controlled by the operating handle 30 to cut the diseased tissue in the human body. While cutting, the rotary cut 23 and the surrounding area are flushed through the flushing cavity 14, and the cut diseased tissue and wastewater after flushing are sucked out through the suction cavity 13 to complete the debridement of the diseased tissue in the human body. The above-mentioned device can simultaneously achieve the rotary cutting and suction removal of diseased tissue in the human body, reduce the residual necrotic material, and effectively protect the surrounding normal tissue and blood vessels, reduce the possibility of patients needing repeated operations, and improve the efficiency, effect and safety of minimally invasive treatment.

[0030] Furthermore, in this embodiment, the rotary cutting opening 23 is arranged on the side of the shell 21, the end of the shell 21 of the rotary cutting head 20 is a blind end, and its top end is an arc-shaped transition. Through the above-mentioned arrangement, the rotary cutting head 22 can be accommodated in the shell 21 and only contacts the diseased tissue through the rotary cutting opening 23. This can protect normal tissue and blood vessels during surgery, and can prevent the rotary cutting head 22 from accidentally injuring human tissue in other parts.

[0031] The rotary cutting opening 23 may be in a chamfered rectangular, circular, elliptical, etc., so as to provide a channel for the necrotic matter to enter the rotary cutting head 20 .

[0032] A negative pressure suction port 31 is provided on the operating handle 30. The end of the above-mentioned suction chamber 13 away from the rotary cutting head 20 is connected to the negative pressure suction port 31. The suction bottle 41 and the suction device 42 can generate negative pressure in the suction chamber 13 through the negative pressure suction port 31. When the rotary cutting head 22 cuts off the diseased tissue, the suction chamber 13 can directly suck out the cut diseased tissue to prevent the suction chamber 13 from being blocked.

[0033] The rotary cutting blade 22 is rotatably mounted on the housing 21 around its own axis.

[0034] Preferably, the rotary cutting blade 22 can be a double-leaf serrated blade to better cut the diseased tissue.

[0035] Furthermore, in this embodiment, in order to enable the rotary cutting head 22 to be rotatably set on the shell 21, an annular groove (not shown in the figure) can be provided on the inner wall of the shell 21, and part of the rotary cutting head 22 can be rotatably extended into the groove to complete the fixation of the rotary cutting head 22 and provide guidance for the rotation of the rotary cutting head 22.

[0036] A connecting assembly 24 is provided at one end of the shell 21 facing the inner tube 11 . The connecting assembly 24 can be connected to the end of the inner tube 11 by means of threads, so as to facilitate replacement of the peeling head 20 .

[0037] The rotary cutting head 20 also includes a rotating shaft 25 (see Figure 8), one end of which is connected to the rotary cutting head 22, and the other end is connected to a driving component in the operating handle 30, such as a motor, so as to control the rotation direction and rotation speed of the rotary cutting head 22 through the operating handle 30.

[0038] Figure 5 is a schematic diagram of the structure of the rotary cutting head and the insertion tube in Figure 1 after they are combined, Figure 6 is a schematic diagram of the structure of the first flushing channel in Figure 5, Figure 7 is a schematic diagram of the structure of the second flushing channel in Figure 5, and Figure 8 is a schematic diagram of the cross-sectional structure of the joint between the operating handle and the insertion tube. Continuing to refer to Figures 1 and 5 through 8, in this embodiment, a partition 15 is further provided between the inner tube 11 and the outer tube 12 to divide the flushing chamber 14 into a first flushing channel 141 and a second flushing channel 142. The opening of the first flushing channel 141, which is distal to the end of the operating handle 30, is located at the end of the rotary cutting head 20 near the insertion tube 10 and is located at the location of the rotary cut 23 on the housing 21 to flush diseased tissue and pus clogged at the rotary cut 23. The end of the outer tube 12 remote from the operating handle 30 is not sealed from the housing 21. A second flushing channel 142 is formed at the rotary cutting head 20 between the outer tube 12 and the sidewall of the housing 21—that is, between the outer tube 12 and the substantial portion of the housing 21 not defined by the rotary cutout 23. The second flushing channel 142 opens at the end of the housing 21 remote from the operating handle 30 and is used to flush diseased tissue and pus from the patient's body. The provision of two flushing channels allows for different flow rates and pressures of flushing fluid to be provided to different areas.

[0039] Furthermore, the two ends of the outer tube 12 are flush with the ends of the shell 21 at the position where the rotary cut 23 is not provided, that is, the open ring of the second flushing channel 142 is provided at the position where the rotary cut 23 is not provided at the end of the shell 21, so as to facilitate the insertion of the insertion tube 10 and the flushing of the diseased tissue and the surrounding area of ​​the human body.

[0040] Furthermore, in the longitudinal direction of the insertion tube 10 , the partition 15 is located flush with the end surface of the opening of the rotary cut 23 and extends along the longitudinal direction of the insertion tube 10 .

[0041] A flushing interface 32 is provided on the operating handle 30, and the flushing interface 32 is connected to the pump body 43 and is connected to the first flushing channel 141 and the second flushing channel 142. Through the flushing interface 32, the pump body 43 can inject flushing liquid, such as saline, into the first flushing channel 141 and the second flushing channel 142 respectively to flush the rotary cutting head 20.

[0042] Furthermore, a plurality of connecting holes 111 are provided on the inner tube 11 of the insertion tube 10 to connect the suction chamber 13 and the flushing chamber 14. A flow control structure, such as a one-way valve or a one-way membrane, is provided on the connecting hole 111 to allow the flushing liquid to enter the suction chamber 13 from the flushing chamber 14 in one direction, flush the human tissue in the suction chamber 13, and prevent the human tissue from being blocked in the suction chamber 13.

[0043] Furthermore, in this embodiment, the insertion tube 10 may be cylindrical as a whole to facilitate insertion.

[0044] Furthermore, a curved portion 16 and a guide wire (not shown) connected to the curved portion 16 are provided on the insertion tube 10. The curved portion 16 can be made of elastic material and is provided on the insertion tube 10 near the position of the rotary cutting head 20. The guide wire can be provided in the flushing cavity 14 or directly buried in the channel inside the outer tube 11 and connected to the guide wire control structure on the operating handle 30. The length of the guide wire is controlled by the operating handle 30 to control the degree of bending of the insertion tube 10.

[0045] Furthermore, the guidewire control structure may include a rotating gear around which the guidewire is wound. A fixing structure is also provided on the rotating gear to fix the rotation angle of the rotating gear. The rotating gear can be used to tighten or loosen the guidewire to adjust the curvature of the curved portion 16 to adapt to the location of the diseased tissue in the human body. When the peeling head 20 is adjusted to the appropriate position, the fixing structure locks the rotation angle of the rotating gear to perform the debridement operation.

[0046] Optionally, the fixing structure may be a snap-fit ​​structure, a magnetic structure, etc.

[0047] 1 , the operating handle 30 is further provided with a rotation speed adjustment button 351 , a flushing water pressure adjustment button 353 , and a bending adjustment knob 354 , etc., so as to facilitate adjustment of parameters such as the rotation direction and speed of the rotary cutting head 22 of the debridement device, the negative pressure in the suction chamber 13 , the flow rate and pressure of the flushing liquid in the flushing chamber 14 , and the bending degree of the insertion tube 10 .

[0048] When performing a debridement operation on diseased tissue using the diseased tissue debridement device provided by the present invention, the insertion tube 10 can be first inserted into the human body, and the degree of curvature of the insertion tube 10 can be adjusted so that the diseased tissue contacts the position of the rotary incision 23; then the rotary cutting head 22 is controlled to cut the diseased tissue; at the same time, the cut diseased tissue is sucked out through the suction chamber 13, and the rotary incision 23 and the surrounding human tissue are flushed through the flushing chamber 14. After the debridement is completed, the insertion tube 10 is removed to complete the operation.

[0049] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of the technical content disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A debridement device for human diseased tissue, characterized in that: It includes an insertion tube, a rotary cutting head and an operating handle, the insertion tube includes an inner tube and an outer tube sleeved outside the inner tube, a dirt suction chamber is formed in the inner tube, and a flushing chamber is formed between the inner tube and the outer tube, the rotary cutting head includes a shell and a rotary cutting cutter head arranged in the shell, the interior of the shell is connected with the dirt suction chamber, a rotary cutting opening for exposing the rotary cutting cutter head is formed on the shell, and a notch corresponding to the rotary cutting opening is formed on the outer tube, the operating handle is connected to the insertion tube and the rotary cutting head, so as to control the rotary cutting cutter head to cut human tissue at the rotary cutting opening, absorb dirt from the dirt suction chamber, and flush the rotary cutting head through the flushing chamber.

2. The debridement device for human diseased tissue according to claim 1, characterized in that: The rotary cut is arranged on the side of the shell, and the top of the shell is a blind end and is arc-shaped.

3. The debridement device for human diseased tissue according to claim 1, characterized in that: The operating handle is provided with a negative pressure suction port, and one end of the dirt suction chamber away from the rotary cutting head is connected to the negative pressure suction port, and a suction bottle and a suction device form negative pressure in the dirt suction chamber through the negative pressure suction port.

4. The debridement device for human diseased tissue according to claim 1, characterized in that: The rotary cutting cutter head is rotatably arranged in the shell around its own axis.

5. The debridement device for human diseased tissue according to claim 4, characterized in that: The rotary cutting head comprises a rotating shaft, one end of which is connected to the rotary cutting cutter head, and the other end of which is connected to a driving component in the operating handle, and the driving component drives the rotary cutting cutter head to rotate via the rotating shaft.

6. The debridement device for human diseased tissue according to claim 1, characterized in that: A partition is provided between the inner tube and the outer tube to divide the flushing cavity into a first flushing channel and a second flushing channel, the opening of the first flushing channel away from the end of the operating handle is opened at the end of the rotary cutting head close to the insertion tube, and is located at the position of the rotary cutting opening on the shell, the end of the outer tube away from the operating handle and the shell are not closed, the second flushing channel is formed between the outer tube and the side wall of the shell at the rotary cutting head, and the opening of the second flushing channel is opened at the end of the shell away from the end of the operating handle.

7. The debridement device for human diseased tissue according to claim 6, characterized in that: The two ends of the outer tube are flush with the ends of the shell at positions where the rotary cut is not provided.

8. The debridement device for human diseased tissue according to claim 6, characterized in that: The inner tube is provided with a plurality of connection holes communicating the dirt suction chamber and the flushing chamber, and the connection holes are provided with a flow direction control structure to allow flushing liquid to enter the dirt suction chamber from the flushing chamber in one direction.

9. The debridement device for human diseased tissue according to claim 1, characterized in that: A bending portion and a guide wire connected to the bending portion are provided on the insertion tube. The bending portion is provided at a position of the insertion tube close to the rotary cutting head. The bending portion is connected to a guide wire control structure on the operating handle through the guide wire. The length of the guide wire is controlled by the operating handle to control the bending degree of the bending portion.

10. The debridement device for human diseased tissue according to claim 9, characterized in that: The guidewire control structure comprises a rotating gear, the guidewire is wound around the rotating gear, and a fixing structure for fixing the rotation angle of the rotating gear is arranged on the rotating gear.

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