Sealing negative pressure protection device for abdominal cavity hyperthermic perfusion chemotherapy in laparotomy

Abstract

The invention discloses a sealing negative pressure protection device for abdominal cavity hyperthermic perfusion chemotherapy in laparotomy, and belongs to the technical field of medical instruments, the sealing negative pressure protection device comprises a protection cover body, the protection cover body is of a three-layer structure and sequentially comprises a porous breathable layer, a middle adsorption layer and a sealing supporting layer from inside to outside, and a circle of medical pressure-sensitive adhesive is arranged on the edge of the inner layer of the protection cover body; a negative pressure connector is arranged at the top of the protective cover body and used for being connected with external negative pressure equipment, two hanging rods are perpendicularly fixed to the inner layer of the protective cover body, telescopic supporting structures are fixed to the bottom ends of the two hanging rods, and a plurality of liquid inlet holes and liquid outlet holes are further formed in the protective cover body. The supporting assembly is integrated on the inner side of the protective cover body, and the problems that the compatibility of the surgical retractor and a sealing rubber strip on the edge of the protective cover body is poor, and gaps are likely to be generated are solved; by arranging the negative pressure connector and the middle adsorption layer, dual treatment of aerosol is achieved, and the occupational exposure risk of medical staff is reduced.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, and in particular relates to a sealed negative pressure protection device for intraperitoneal hyperthermic chemotherapy during open surgery. Background Technology

[0002] Open surgery combined with hyperthermic intraperitoneal chemotherapy (HIPEC) is an important method for treating peritoneal metastases and preventing postoperative recurrence. It involves circulating chemotherapy drugs heated to 42-43°C into the peritoneal cavity, using the high temperature to directly kill tumor cells and enhance drug permeability. However, this technique faces several challenges in clinical application: First, the need for external support components to open the abdominal incision during surgery leads to poor sealing of existing peritoneal isolation devices, making it impossible to create a continuous and stable negative pressure environment, allowing aerosols to easily leak from the edges or gaps; second, the lack of active adsorption capacity results in low interception efficiency of volatile chemotherapy drug aerosols, making it difficult to meet safety protection requirements.

[0003] Therefore, there is an urgent need for a thermal perfusion chemotherapy protective device that integrates support components, has strong sealing performance, and possesses active adsorption capabilities to address the shortcomings of existing technologies. Summary of the Invention

[0004] The purpose of this invention is to provide a sealed negative pressure protection device for intraperitoneal hyperthermic chemotherapy during open surgery, in order to overcome the shortcomings of the prior art.

[0005] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows: A sealed negative pressure protective device for intraperitoneal hyperthermic perfusion chemotherapy during open surgery includes: a protective cover body, which has a three-layer structure, consisting of a porous breathable layer, an intermediate adsorption layer, and a sealing support layer from the inside out. A ring of medical pressure-sensitive adhesive is provided around the inner edge of the protective cover body. A negative pressure interface is provided at the top of the protective cover body for connecting to an external negative pressure device. Two hanging rods are vertically fixed to the inner layer of the protective cover body, and telescopic support structures are fixed at the bottom ends of the two hanging rods. The protective cover body also has several inlet holes and outlet holes.

[0006] Furthermore, the negative pressure interface adopts a standard Luer connector and is integrally formed with the sealing support layer, and a one-way valve is provided inside the negative pressure interface.

[0007] Furthermore, the porous breathable layer is made of medical-grade polyethylene, the middle adsorption layer is wrapped with breathable non-woven fabric, and the interior is filled with molecular sieve and cation exchange resin mixed particles, medical-grade coconut shell granular activated carbon and activated carbon fiber felt from the outside to the inside. The sealing support layer is made of medical-grade high-elasticity silicone with a Shore hardness of 50-60A.

[0008] Furthermore, the inner walls of both the inlet and outlet holes are provided with sealing sponges, and the inlet and outlet holes are used to connect to the inlet and outlet pipes of an external hot water injection device.

[0009] Furthermore, the protective cover body has symmetrical through holes along its edge, and elastic straps are threaded through the corresponding through holes.

[0010] Furthermore, the telescopic support structure includes a sleeve, with telescopic rods slidably disposed at both ends of the sleeve, and U-shaped brackets fixed at the ends of both telescopic rods. Locking components for limiting the telescopic length of the telescopic rods are also fixed at both ends of the sleeve.

[0011] Furthermore, the locking assembly includes a first locking member fixed to the end of the sleeve, a second locking member being externally threaded onto the first locking member, a first step being provided on the outer side of the first locking member near the sleeve end, a second step being provided on the outer side of the first locking member away from the sleeve end, an external thread being provided between the first step and the second step, a plurality of contraction slots being circumferentially formed on the end of the first locking member away from the sleeve, and the end of the first locking member away from the sleeve being frustoconical, a third step being provided on the inner side of the end of the first locking member away from the sleeve, one side of the third step being adapted to the diameter of the sleeve, and the other side being adapted to the diameter of the telescopic rod, the second locking member having a threaded section and a tapered section inside, the threaded section engaging with the external thread of the first locking member, and the tapered section engaging with the frustoconical end of the first locking member.

[0012] The present invention provides a sealed negative pressure protective device for intraperitoneal hyperthermic perfusion chemotherapy during open surgery, which has the following advantages compared with the prior art: 1. Significantly improves sealing performance and creates a stable negative pressure environment. By integrating the support components into the inner side of the protective cover body, the problem of poor compatibility between the external support components and the edge sealing strips of the protective cover body, which easily leads to gaps, is solved. The symmetrically opened through holes on the edges are fitted with elastic straps to further tighten and fix the structure, forming multiple sealing barriers; When combined with an external negative pressure device connected to the negative pressure interface, a continuous and stable negative pressure environment can be formed in the abdominal cavity to remove aerosols and achieve dual protection with the intermediate adsorption layer.

[0013] 2. Integrated active adsorption function for efficient interception of chemotherapy drug aerosols

[0014] The intermediate adsorption layer employs a multi-stage adsorption system consisting of a mixture of molecular sieves and cation exchange resin particles, medical-grade coconut shell granular activated carbon, and activated carbon fiber felt. The outer layer is wrapped in breathable non-woven fabric, ensuring gas flow while efficiently capturing volatile chemotherapy drug aerosols and harmful volatiles through a dual mechanism of physical adsorption (activated carbon, molecular sieves) and chemical adsorption (cation exchange resin). The porous breathable layer, made of medical-grade polyethylene, allows gas to pass through while preventing liquid splashing. Working synergistically with the intermediate adsorption layer, it achieves an integrated "breathability-adsorption-filtration" system, significantly improving the interception efficiency of chemotherapy drugs and reducing the occupational exposure risk for medical personnel. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0016] Figure 1 This is a front sectional view of the present invention; Figure 2 for Figure 1 A magnified view of a portion at point A; Figure 3 This is a bottom view of the present invention; Figure 4 This is an exploded view of the locking component of the present invention.

[0017] In the diagram: 1-Protective cover body, 2-Porous breathable layer, 3-Intermediate adsorption layer, 4-Sealing support layer, 5-Medical pressure-sensitive adhesive, 6-Negative pressure interface, 7-Inlet hole, 8-Outlet hole, 9-Through hole, 10-Sleeve, 11-Telescopic rod, 12-U-shaped bracket, 13-Locking component, 14-First locking element, 15-Second locking element, 16-First step, 17-Second step, 18-Contraction seam, 19-Third step. Detailed Implementation

[0018] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments: refer to Figure 1-4As shown, this invention provides a sealed negative pressure protective device for intraperitoneal hyperthermic chemotherapy during open surgery, comprising: a protective cover body 1, which has a three-layer structure, consisting of a porous breathable layer 2, an intermediate adsorption layer 3, and a sealing support layer 4 from the inside out. A ring of medical pressure-sensitive adhesive 5 is provided around the inner edge of the protective cover body 1. A negative pressure interface 6 is provided at the top of the protective cover body 1 for connecting to an external negative pressure device. Two hanging rods are vertically fixed to the inner layer of the protective cover body 1, and a telescopic support structure is fixed at the bottom end of each of the two hanging rods. The protective cover body 1 also has several inlet holes 7 and outlet holes 8. The protective cover body 1 adopts a three-layer composite structure of porous breathable layer 2, intermediate adsorption layer 3, and sealing support layer 4, wherein the medical pressure-sensitive adhesive 5 is provided at the inner edge, allowing direct contact with the abdominal incision skin and reducing edge gaps. More preferably, the hanging rods are adjustable in length and lockable to adapt to different patients' abdominal heights.

[0019] In a preferred embodiment, the negative pressure interface 6 adopts a standard Luer connector and is integrally formed with the sealing support layer 4. The negative pressure interface 6 is provided with a one-way valve to prevent airflow backflow and avoid the re-infusion of adsorbed aerosols into the abdominal cavity.

[0020] As a preferred embodiment, the porous breathable layer 2 is made of medical-grade polyethylene (PE), which has good biocompatibility, is non-irritating, and does not adhere to the skin or incision tissue.

[0021] The intermediate adsorption layer 3 is externally wrapped with breathable non-woven fabric, and internally filled from the outside in with a mixture of molecular sieve and cation exchange resin particles, medical-grade coconut shell granular activated carbon, and activated carbon fiber felt. The molecular sieve adsorbs moisture from the aerosol, reducing moisture absorption of the adsorption layer; the cation exchange resin specifically adsorbs platinum and anthracycline drug ions, achieving irreversible adsorption; the medical-grade coconut shell granular activated carbon deeply adsorbs drug particles and lipid-soluble / water-soluble droplets, with a large adsorption capacity, suitable for the characteristics of hyperthermic perfusion chemotherapy drugs; the activated carbon fiber felt has a specific surface area ≥2000 m². 2 / g, rapidly captures high concentrations of aerosols and small molecule volatile organic compounds, with fast adsorption speed and low airflow resistance.

[0022] The sealing support layer 4 is made of medical-grade high-elasticity silicone with a Shore hardness of 50-60A. The sealing support layer 4 uses medical-grade high-elasticity silicone with a Shore hardness of 50-60A, which combines flexibility and support, conforming to the curvature of the abdominal wall skin while preventing deformation due to negative pressure. It is also resistant to chemical corrosion, high temperatures, and easy to sterilize.

[0023] In a preferred embodiment, the inner walls of both the inlet hole 7 and the outlet hole 8 are provided with sealing sponges. The inlet hole 7 and the outlet hole 8 are used to connect the inlet pipe and outlet pipe of an external hot water injection device. The sealing sponges on the inner walls of the inlet hole 7 and the outlet hole 8 automatically seal when the hot water injection device pipeline is connected, preventing leakage.

[0024] In a preferred embodiment, the protective cover body 1 has symmetrical through holes 9 on its edge, and elastic straps are inserted between the through holes 9 to further tighten and fix it, forming a multi-layer sealing barrier.

[0025] In a preferred embodiment, the telescopic support structure includes a sleeve 10, with telescopic rods slidably disposed at both ends of the sleeve 10. U-shaped brackets 12 are fixed to the ends of both telescopic rods 11. Locking components 13 for limiting the telescopic length of the telescopic rods 11 are also fixed to both ends of the sleeve 10. Integrating the support components inside the protective cover body 1 solves the problem of poor compatibility and easy gap formation between the surgical hook and the edge sealing strip of the protective cover body 1.

[0026] In a preferred embodiment, the locking assembly 13 includes a first locking member 14 fixed to the end of the sleeve 10. A second locking member 15 is externally threaded onto the first locking member 14. A first step 16 is provided on the outer side of the first locking member 14 near the end of the sleeve 10, and a second step 17 is provided on the outer side of the first locking member 14 away from the sleeve 10. An external thread is provided between the first step 16 and the second step 17. The end of the first locking member 14 away from the sleeve 10 also has a loop. The first locking member 14 has several contraction slots 18, and its end away from the sleeve 10 is truncated cone-shaped. A third step 19 is provided on the inner side of the end of the first locking member 14 away from the sleeve 10. One side of the third step 19 is adapted to the diameter of the sleeve 10, and the other side is adapted to the diameter of the telescopic rod 11. The second locking member 15 has a threaded section and a tapered section inside. The threaded section engages with the external thread of the first locking member 14, and the tapered section engages with the truncated cone-shaped end of the first locking member 14. When tightened, the tapered section of the second locking member 15 presses against the truncated cone-shaped end of the first locking member 14 and tightens with the cooperation of the contraction slots 18, thereby locking the telescopic rod 11. When loosened, the truncated cone-shaped end of the first locking member 14 disengages from the tapered section of the second locking member 15 and enters the threaded section. The contraction slots 18 reset under elastic action, thereby unlocking the rod. Therefore, the locking component 13 can achieve stepless adjustment of the length of the support component through the threaded engagement of the first locking member 14 and the second locking member 15, ensuring support stability and improving the adaptability of the device.

[0027] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and 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, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0028] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0029] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A sealed negative pressure protective device for intraperitoneal hyperthermic chemotherapy during open surgery, characterized in that, include: The protective cover body (1) has a three-layer structure, consisting of a porous breathable layer (2), an intermediate adsorption layer (3), and a sealing support layer (4) from the inside out. A ring of medical pressure-sensitive adhesive (5) is provided on the inner edge of the protective cover body (1). A negative pressure interface (6) is provided on the top of the protective cover body (1). The negative pressure interface (6) is used to connect to an external negative pressure device. Two hanging rods are vertically fixed on the inner layer of the protective cover body (1). The bottom ends of the two hanging rods are fixed with telescopic support structures. Several liquid inlet holes (7) and liquid outlet holes (8) are also provided on the protective cover body (1).

2. The sealed negative pressure protective device for intraperitoneal hyperthermic chemotherapy in open surgery according to claim 1, characterized in that, The negative pressure interface (6) adopts a standard Luer connector and is integrally formed with the sealing support layer (4). A one-way valve is provided inside the negative pressure interface (6).

3. The sealed negative pressure protective device for intraperitoneal hyperthermic perfusion chemotherapy during open surgery according to claim 1, characterized in that, The porous breathable layer (2) is made of medical grade polyethylene. The middle adsorption layer (3) is wrapped with breathable non-woven fabric on the outside and filled with molecular sieve and cation exchange resin mixed particles, medical grade coconut shell granular activated carbon and activated carbon fiber felt from the outside to the inside. The sealing support layer (4) is made of medical grade high elastic silicone with a Shore hardness of 50-60A.

4. The sealed negative pressure protective device for intraperitoneal hyperthermic perfusion chemotherapy in open surgery according to claim 1, characterized in that, The inner walls of the inlet hole (7) and the outlet hole (8) are provided with sealing sponges. The inlet hole (7) and the outlet hole (8) are used to connect the inlet pipe and the outlet pipe of the external hot water injection equipment.

5. A sealed negative pressure protective device for intraperitoneal hyperthermic perfusion chemotherapy during open surgery according to claim 1, characterized in that, The protective cover body (1) has symmetrical through holes (9) on its edge, and elastic straps are inserted between the through holes (9).

6. The sealed negative pressure protective device for intraperitoneal hyperthermic chemotherapy in open surgery according to claim 1, characterized in that, The telescopic support structure includes a sleeve (10), with telescopic rods (11) slidably arranged at both ends of the sleeve (10). U-shaped brackets (12) are fixed at the ends of both telescopic rods (11). Locking components (13) for limiting the telescopic length of the telescopic rods (11) are also fixed at both ends of the sleeve (10).

7. A sealed negative pressure protective device for intraperitoneal hyperthermic chemotherapy in open surgery according to claim 6, characterized in that, The locking assembly (13) includes a first locking member (14) fixed to the end of the sleeve (10), and a second locking member (15) is externally threaded onto the first locking member (14). A first step (16) is provided on the outer side of the first locking member (14) near the end of the sleeve (10), and a second step (17) is provided on the outer side of the first locking member (14) away from the sleeve (10). An external thread is provided between the first step (16) and the second step (17). The end of the first locking member (14) away from the sleeve (10) also has a circumferential opening. The first locking member (14) is provided with several contraction joints (18), and the end of the first locking member (14) away from the sleeve (10) is truncated cone-shaped. The inner side of the end of the first locking member (14) away from the sleeve (10) is provided with a third step (19). One side of the third step (19) is adapted to the diameter of the sleeve (10), and the other side is adapted to the diameter of the telescopic rod (11). The second locking member (15) is provided with a threaded section and a tapered section inside. The threaded section is engaged with the external thread of the first locking member (14), and the tapered section is engaged with the truncated cone-shaped end of the first locking member (14).

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