Surgical skin negative pressure lifting device

Abstract

The present application relates to the technical field of medical devices, in particular to a surgical skin negative pressure lifting device, comprising a negative pressure cylinder, a piston and a plurality of tensioning mechanisms; the negative pressure cylinder is vertically arranged; the piston is installed in the negative pressure cylinder, and a suction chamber is defined between the lower end of the piston, the inner wall of the negative pressure cylinder and the skin of the patient, and the piston can move up and down relative to the negative pressure cylinder; the tensioning mechanism comprises a telescopic frame and a tensioning roller; the inside of the tensioning roller is communicated with the suction chamber through the telescopic frame, and rotates to promote the skin of the patient to expand away from the negative pressure cylinder when air is introduced. When in use, the negative pressure cylinder is placed on the skin of the patient, and reciprocating movement of the piston can squeeze the gas to drive the tensioning roller to rotate, and the skin of the patient below the negative pressure cylinder is stretched out, and the operation can be completed by one person, which is simple, and the tensioning rollers of the plurality of tensioning mechanisms simultaneously pull the skin of the patient away from the negative pressure cylinder with the negative pressure cylinder as the center, and the relaxation of the skin of the patient is more uniform.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a surgical skin negative pressure lifting device. Background Technology

[0002] Pleural effusion and ascites are common accompanying symptoms in patients with lung cancer, which can easily cause various complications and affect their quality of life. The most common method used in clinical practice is puncture to aspirate the fluid. During the puncture process, ultrasound localization is required to find the best puncture point. However, currently, the surgeon mainly relies on using his hands or surgical towel forceps to lift the patient's abdominal skin to insert the abdominal paracentesis device. This method can cause skin rupture or bruising due to excessive pressure, which is traumatic to the patient. Moreover, the surgical area is not aesthetically pleasing, and the incision heals slowly after surgery.

[0003] Especially for elderly people, whose skin is loose and wrinkled, the marked line is very easy to shift due to skin wrinkles, looseness, and changes in body position after the puncture site is marked. In this case, medical staff need to lift the patient's skin with clamps. Although this method can lift the skin to make it easier for medical staff to observe and locate, the skin will be stretched asymmetrically because it is lifted by only two symmetrical forces. This makes the positioning of the medical staff less accurate and affects the smooth progress of the puncture process.

[0004] In the prior art, invention patent CN117045328B discloses a puncture device with auxiliary positioning function. This device increases the volume of a sealed cavity formed by the cooperation of a negative pressure shell, a first piston plate, an inner shell, a support frame, and the patient's skin. This reduces the pressure within the sealed cavity, creating a negative pressure environment. The negative pressure causes the patient's skin to rise upwards, forming a uniform spherical surface, making the puncture position clear and accurate, facilitating the positioning of the puncture site by medical personnel. However, when the patient's skin is loose and wrinkled, it is difficult for the negative pressure shell to fit tightly against the patient's skin, affecting the efficiency of creating negative pressure in the sealed cavity. Summary of the Invention

[0005] This invention provides a surgical skin negative pressure lifting device to solve the problem that existing puncture devices affect suction efficiency when lifting the skin due to skin folds.

[0006] The surgical skin negative pressure lifting device of the present invention adopts the following technical solution:

[0007] A surgical skin negative pressure lifting device is used to lift the patient's skin to facilitate the insertion of a puncture needle. It includes a negative pressure cylinder, a piston, and a tensioning mechanism. The negative pressure cylinder is vertically positioned, with its lower end forming a flared structure for conforming to the patient's skin. The piston is mounted on the negative pressure cylinder, and a suction chamber is defined between the lower end of the piston, the inner wall of the negative pressure cylinder, and the patient's skin. The piston is capable of moving up and down relative to the negative pressure cylinder. Multiple tensioning mechanisms are evenly and spaced around the circumference of the negative pressure cylinder. Each tensioning mechanism includes a telescopic frame and a tensioning roller. The telescopic frame is hinged to the negative pressure cylinder about a horizontal axis, and a first elastic element is provided between the telescopic frame and the negative pressure cylinder. The hinge axis between the telescopic frame and the negative pressure cylinder is the tangent to the negative pressure cylinder at the hinge position. The telescopic frame has a gas channel communicating with the suction chamber. A first one-way valve is located at the end of the gas channel closest to the suction chamber, allowing gas to enter the gas channel from the suction chamber. A tension roller is rotatably mounted at the end of the telescopic frame furthest from the negative pressure cylinder, with its rotation axis parallel to the hinge axis of the negative pressure cylinder and the telescopic frame. A first elastic element causes the telescopic frame to rotate until the tension roller is in contact with the patient's skin. The tension roller communicates with the gas channel and rotates when air enters the gas channel, causing the patient's skin to unfold away from the negative pressure cylinder. A piston moves upward to reduce the pressure in the suction chamber, and moves downward to compress the gas in the suction chamber through the gas channel, causing the tension roller to rotate.

[0008] Furthermore, the piston is a threaded sleeve, which is located inside the negative pressure cylinder and is sealed to the inner wall of the negative pressure cylinder. The negative pressure cylinder restricts the piston from rotating around the vertical axis. A screwing component is provided between the threaded sleeve and the negative pressure cylinder. The lower end of the screwing component is threaded to the piston, and the upper end passes through the upper end of the negative pressure cylinder and rotates with the negative pressure cylinder. The rotation of the screwing component drives the threaded sleeve to move up and down. The screwing component is a hollow tube with a flexible seal at the upper end. The puncture needle passes through the upper end of the screwing component and extends into the suction chamber.

[0009] Furthermore, an installation ring is fixed to the outside of the negative pressure cylinder; the telescopic frame includes a hinge rod, a transition frame, and an installation frame. One end of the hinge rod is rotatably mounted on the installation ring and connected to the installation ring through the first elastic element; a support platform is provided at the other end of the hinge rod; there are two installation frames, located on both sides of the tension roller along the axial direction, and the two ends of the tension roller are rotatably mounted on the two installation frames respectively; both installation frames are slidably mounted on the support platform along the axial direction of the hinge rod, and a second elastic element is provided between the frame and the support platform, which causes the tension rollers on the two installation frames to abut against the patient's skin; the transition frame is slidably connected to the hinge rod along its axial direction, and both the transition frame and the hinge rod are hollow and connected internally. The interior of the hinge rod is connected to the suction chamber, and the first one-way valve is located inside the hinge rod; impellers are provided at both ends of the tension roller, and a cover sleeved on the transition frame is provided outside the impellers. An air outlet is provided on the cover, and a second one-way valve that only allows gas to flow out is provided at the air outlet; the gas entering the transition frame causes the tension roller to rotate by blowing the impellers.

[0010] Furthermore, the mounting ring is a split structure, including an upper closing ring and a lower closing ring distributed vertically. The upper closing ring and the lower closing ring have multiple connecting grooves distributed around their circumference on their sides that are close to each other. A duct pipe that passes through the negative pressure cylinder is installed in the connecting groove. The duct pipe connects the suction chamber and the interior of the hinge rod.

[0011] Furthermore, the upper and lower closing rings are provided with hinge slots on their sides that are close to each other, corresponding to the connecting slots. The end of the hinge rod is provided with a hinge shaft. After the hinge shaft is engaged with the hinge slot on the upper or lower closing ring, the upper and lower closing rings are engaged and fixedly connected.

[0012] Furthermore, a surgical skin negative pressure lifting device also includes a support mechanism, which comprises a support frame and multiple support units. The support frame is fixed to the negative pressure cylinder, and the multiple support units are distributed circumferentially around the negative pressure cylinder. Each support unit includes a support base, multiple sliding frames, and multiple support rollers. The support base and the support frame are helically engaged in the vertical direction. A third elastic element is provided between the support base and the support frame. The multiple sliding frames are evenly distributed circumferentially around the support base, and each sliding frame is slidably mounted on the support base radially, with a fourth elastic element provided between it and the support base. Each support roller is respectively... The support rollers are rotatably mounted on a sliding frame about a horizontal axis, and the axis of the support rollers is inclined relative to the sliding direction of the sliding frame. The inclination direction of the multiple support rollers relative to their corresponding sliding frames is consistent. When the support base and the support frame approach each other in the vertical direction, the rotation of the support base drives the multiple sliding frames and support rollers to rotate synchronously. While the support rollers revolve around the sliding frame, they also rotate about their own axis. Under the influence of the inclination of their axis relative to the sliding direction of the sliding frame, the support rollers cause the sliding frame to extend relative to the support base, thereby increasing the support area defined by the multiple support rollers.

[0013] Furthermore, a pressure relief port is provided on the side wall of the negative pressure cylinder, which is connected to the suction chamber, and a pressure relief valve is installed on the pressure relief port.

[0014] Furthermore, the puncture needle is marked with graduations along its axial direction to record the displacement of the puncture needle relative to the negative pressure cylinder.

[0015] Optionally, the piston is a suction cylinder, the lower end of which slides and seals against the inner wall of the negative pressure cylinder, and the upper end of which extends out of the negative pressure cylinder. An elastic locking element is provided at the upper end of the negative pressure cylinder, which locks the position of the suction cylinder when it moves upward to a preset position. A guide cylinder is provided inside the negative pressure cylinder, passing through the suction cylinder. The lower end of the guide cylinder is flush with the lower end of the negative pressure cylinder for contact with the patient's skin. The puncture needle passes through the guide cylinder and acts on the patient's skin.

[0016] Furthermore, a limiting groove is provided on the suction cylinder, and the elastic locking component includes a locking block and a fifth elastic component connecting the locking block and the negative pressure cylinder; the locking block abuts against the side wall of the suction cylinder under the action of the fifth elastic component, and cooperates with the limiting groove when the suction cylinder moves upward to the preset position to lock the position of the suction cylinder; an unlocking cylinder is provided outside the negative pressure cylinder, and a wedge surface is provided on the locking block. The unlocking cylinder moves downward to push the wedge surface so that the locking block disengages from the limiting groove.

[0017] The beneficial effects of this invention are as follows: The surgical skin negative pressure lifting device of this invention, by setting a tensioning mechanism, places the negative pressure cylinder on the patient's skin, and the reciprocating piston can drive the tensioning rollers of multiple tensioning mechanisms to rotate, thus stretching the patient's skin under the negative pressure cylinder. Only one person is needed to complete the operation, which is simple. Moreover, the tensioning rollers of multiple tensioning mechanisms pull the patient's skin away from the negative pressure cylinder at the same time, with the negative pressure cylinder as the center. Compared with manually stretching it in advance, the patient's skin stretches more evenly.

[0018] Furthermore, the support rollers of multiple support units of the support mechanism are placed on the operating table or hospital bed to support the negative pressure cylinder, so that the negative pressure cylinder can be kept vertical. After the suction chamber inside the negative pressure cylinder is aspirated to negative pressure, the operator can release the negative pressure cylinder and use the support mechanism to keep the negative pressure cylinder vertical, so that the operator can free their hands to perform the puncture operation.

[0019] Furthermore, when the negative pressure cylinder tilts due to accidental contact, the support frame presses down on the support seat of at least one support unit on one side, causing the support seat to rotate and drive the corresponding multiple sliding frames and multiple support rollers to rotate. The support area defined by the multiple support rollers of the support unit on the compressed side increases, making the support more stable and preventing the negative pressure cylinder from tilting further, thus further ensuring the stability of the puncture process. Attached Figure Description

[0020] 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a surgical skin negative pressure lifting device according to the present invention;

[0022] Figure 2 for Figure 1 Enlarged view of point X in the middle;

[0023] Figure 3 This is a front view of the overall structure of an embodiment of a surgical skin negative pressure lifting device according to the present invention;

[0024] Figure 4 for Figure 3 Schematic diagram of cross section along the AA direction;

[0025] Figure 5 This is a schematic diagram showing the disassembled structure of a surgical skin negative pressure lifting device according to the present invention, excluding the supporting mechanism;

[0026] Figure 6 This is an exploded view of the mounting ring and one of the tensioning mechanisms in one embodiment of a surgical skin negative pressure lifting device of the present invention;

[0027] Figure 7 for Figure 6 Enlarged view of point Y in the middle;

[0028] Figure 8 This is a front view of the tensioning mechanism in one embodiment of a surgical skin negative pressure lifting device according to the present invention;

[0029] Figure 9 for Figure 8 Schematic diagram of cross section along the BB direction;

[0030] Figure 10 This is a schematic diagram showing the support frame and one of the support units of a support mechanism in one embodiment of a surgical skin negative pressure lifting device of the present invention;

[0031] Figure 11 This is a cross-sectional schematic diagram of the overall structure of another embodiment of the surgical skin negative pressure lifting device of the present invention;

[0032] In the diagram: 100, negative pressure cylinder; 110, elastic locking element; 120, guide cylinder; 130, mounting ring; 131, connecting groove; 132, air guide pipe; 133, hinge groove; 140, pressure relief port; 150, pressure relief valve; 160, unlocking cylinder; 200, screwing element; 300, threaded sleeve; 310, suction cylinder; 400, puncture needle; 500, tensioning mechanism; 510, hinge rod; 511, support platform; 51 2. Hinge shaft; 520. Transition frame; 521. Cover; 530. Mounting frame; 531. Second elastic element; 540. Tensioning roller; 541. Impeller; 600. Support mechanism; 610. Support frame; 611. Arc segment; 612. Connecting rod; 613. Mating cylinder; 614. Spiral groove; 620. Support seat; 621. Protrusion; 622. Third elastic element; 630. Sliding frame; 640. Support roller. Detailed Implementation

[0033] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] An embodiment of the surgical skin negative pressure lifting device of the present invention is used to lift the patient's skin to facilitate the insertion of a puncture needle 400, such as... Figures 1 to 10 As shown, it includes a negative pressure cylinder 100, a piston, and a tensioning mechanism 500.

[0035] The negative pressure cylinder 100 is set vertically, and the lower end is an flared structure for adhering to the patient's skin, that is, the lower end of the negative pressure cylinder 100 is tapered with the larger end facing down.

[0036] The piston is installed in the negative pressure cylinder 100, and the lower end of the piston, the inner wall of the negative pressure cylinder 100 and the patient's skin define a suction chamber. The piston can move up and down relative to the negative pressure cylinder 100.

[0037] Multiple tensioning mechanisms 500 are evenly distributed around the negative pressure cylinder 100 and spaced apart. Each tensioning mechanism 500 includes a telescopic frame and a tensioning roller 540. The telescopic frame is hinged to the negative pressure cylinder 100 about a horizontal axis, and a first elastic element (not shown in the figure) is provided between the telescopic frame and the negative pressure cylinder 100. The hinge axis between the telescopic frame and the negative pressure cylinder 100 is the tangent of the negative pressure cylinder 100 at the hinge position. A gas passage communicating with the suction chamber is provided inside the telescopic frame. A first one-way valve (not shown in the figure) is provided at the end of the gas passage near the suction chamber to allow gas to enter the gas passage from the suction chamber. The tension roller 540 is rotatably mounted at the end of the telescopic frame away from the negative pressure cylinder 100, and the rotation axis of the tension roller 540 is parallel to the hinge axis of the negative pressure cylinder 100 and the telescopic frame. The first elastic element causes the telescopic frame to rotate until the tension roller 540 is in contact with the patient's skin. The tension roller 540 is connected to the gas channel and rotates when air is introduced into the gas channel, causing the patient's skin to spread away from the negative pressure cylinder 100. The piston moves upward to reduce the pressure in the suction chamber, and moves downward to squeeze the gas in the suction chamber through the gas channel, causing the tension roller 540 to rotate.

[0038] During use, the patient lies supine on the operating table or hospital bed. The negative pressure cylinder 100 is placed vertically on the patient, with the flared structure at the lower end of the cylinder 100 adhering to the patient's skin. When the patient's skin is loose and wrinkled, the flared structure at the lower end of the negative pressure cylinder 100 may not fully adhere to the skin, resulting in a gap initially. The piston is then moved up and down repeatedly. As the piston moves upward, the volume of the suction chamber increases, reducing the pressure. As the piston moves downward, it compresses the gas in the suction chamber into the gas channel within the telescopic frame, causing the tension roller 540 to rotate and expand the skin below the negative pressure cylinder 100 outward. After several reciprocating movements of the piston, the patient's skin below the negative pressure cylinder 100 is stretched, and the flared structure at the lower end of the cylinder 100 can fully adhere to the patient's skin. The subsequent upward movement of the piston lifts a portion of the skin within the negative pressure cylinder 100, facilitating the puncture needle 400 to operate on that area. During the reciprocating motion of the piston, some gas enters the suction chamber through the gap between the lower end of the negative pressure cylinder 100 and the patient's skin, and some gas leaves the suction chamber through the gap between the lower end of the negative pressure cylinder 100 and the patient's skin. However, since the gap is small, it has little impact on the pressure change in the suction chamber, and the amount of gas flowing out of the gap is less than the amount of gas entering the gas channel, so it will not affect the rotation of the tension roller 540.

[0039] By setting up the tensioning mechanism 500, the negative pressure cylinder 100 is placed on the patient's skin. The reciprocating movement of the piston can drive the tensioning rollers 540 of the multiple tensioning mechanisms 500 to rotate, thus stretching the patient's skin under the negative pressure cylinder 100. Only one person is needed to complete the operation, which is simple. Moreover, the tensioning rollers 540 of the multiple tensioning mechanisms 500 pull the patient's skin away from the negative pressure cylinder 100 at the same time, with the negative pressure cylinder 100 as the center. Compared with manually stretching it in advance, the patient's skin stretches more evenly.

[0040] In this embodiment, the piston component is a threaded sleeve 300, which is disposed inside the negative pressure cylinder 100 and sealed against the inner wall of the negative pressure cylinder 100. The negative pressure cylinder 100 restricts the rotation of the threaded sleeve 300 around the vertical axis. Specifically, both the inner wall of the negative pressure cylinder 100 and the outer wall of the threaded sleeve 300 are polygonal prisms, and the negative pressure cylinder 100 and the threaded sleeve 300 are fitted together by the polygonal prisms to restrict the rotation of the threaded sleeve 300. A screwing component 200 is provided between the threaded sleeve 300 and the negative pressure cylinder 100. The lower end of the screwing component 200 is threaded into the threaded sleeve 300, and the upper end passes through the upper end of the negative pressure cylinder 100 and rotates with the negative pressure cylinder 100. The rotation of the screwing component 200 causes the threaded sleeve 300 to move up and down. The screwing component 200 is a hollow tube with a flexible seal at the upper end. The puncture needle 400 passes through the upper end of the screwing component 200 and extends into the suction chamber. Specifically, a replaceable sealing rubber is attached to the upper end of the screw-on part 200, which keeps the suction chamber sealed.

[0041] In this embodiment, a mounting ring 130 is fixed to the outside of the negative pressure cylinder 100; the telescopic frame includes a hinge rod 510, a transition frame 520, and a mounting frame 530. One end of the hinge rod 510 is rotatably mounted on the mounting ring 130 and connected to the mounting ring 130 through the first elastic element; the other end of the hinge rod 510 is provided with a support platform 511. There are two mounting frames 530, located on both sides of the tension roller 540 along the axial direction. Both ends of the tension roller 540 are rotatably mounted on the two mounting frames 530; both mounting frames 530 are slidably mounted on the support platform 511 along the axial direction of the hinge rod 510, and a second elastic element 531 is provided between the mounting frame 530 and the support platform 511. The second elastic element 531 causes the tension roller 540 on the two mounting frames 530 to abut against the patient's skin. The transition frame 520 and the hinge rod 510 are slidably connected along their axial direction. Both the transition frame 520 and the hinge rod 510 are hollow and interconnected. The interior of the hinge rod 510 is connected to the suction chamber. The first one-way valve is located inside the hinge rod 510. Impellers 541 are provided at both ends of the tension roller 540. A cover 521 is provided on the transition frame 520 and fitted over the impellers 541. An air outlet is provided on the cover 521, and a second one-way valve (not shown in the figure) is provided at the air outlet to allow only gas to flow out. The gas entering the transition frame 520 causes the tension roller 540 to rotate by blowing the impellers 541.

[0042] In this embodiment, the mounting ring 130 is a split structure, including an upper closing ring and a lower closing ring distributed vertically. The upper closing ring and the lower closing ring are provided with multiple circumferentially distributed connecting grooves 131 on their adjacent sides. A duct 132 passing through the negative pressure cylinder 100 is installed in the connecting groove 131. The duct 132 connects the suction chamber and the interior of the hinge rod 510.

[0043] In this embodiment, the upper and lower closing rings are provided with hinge slots 133 corresponding to the connecting slots 131 on their adjacent sides. The end of the hinge rod 510 is provided with a hinge shaft 512. After the hinge shaft 512 cooperates with the hinge slots 133 on the upper or lower closing ring, the upper and lower closing rings are engaged and fixedly connected. A split mounting ring 130 is provided to facilitate the installation of the hinge rod 510 and the air guide tube 132. A flange is provided on the lower part of the negative pressure cylinder 100 to support the mounting ring 130. The mounting ring 130 is sleeved on the outside of the negative pressure cylinder 100 and connected to the flange by bolts.

[0044] In this embodiment, the surgical skin negative pressure lifting device also includes a support mechanism 600, which includes a support frame 610 and multiple support units. The support frame 610 is fixed to the negative pressure cylinder 100, and the multiple support units are distributed circumferentially around the negative pressure cylinder 100. Each support unit includes a support base 620, multiple sliding frames 630, and multiple support rollers 640; the support base 620 and the support frame 610 are helically engaged in the vertical direction; and a third elastic element 622 is provided between the support base 620 and the support frame 610; specifically, the support frame 610 includes multiple frames distributed circumferentially around the negative pressure cylinder 100, each frame including an arc segment 611, a connecting rod 612, and a mating cylinder 613, the connecting rod 612 is horizontal and radially arranged along the negative pressure cylinder 100, and connects the arc segment 611 and the mating cylinder 613, the arc segments 611 of the multiple frames form a ring and are fixedly connected to the outside of the negative pressure cylinder 100; the mating cylinder 613 is vertically arranged and sleeved on the upper end of the support base 620, the inner wall of the mating cylinder 613 is provided with a spiral groove 614, and the upper end of the support base 620 is provided with a protrusion 621 for engaging with the spiral groove 614. Multiple sliding frames 630 are evenly distributed circumferentially around the support base 620. Each sliding frame 630 is radially slidably mounted on the support base 620, and a fourth elastic element (not shown in the figure) is provided between it and the support base 620. Each support roller 640 is rotatably mounted on a sliding frame 630 about a horizontal axis, and the axial direction of the support roller 640 is inclined relative to the sliding direction of the sliding frame 630. The inclination direction of the multiple support rollers 640 relative to their corresponding sliding frames 630 is consistent. Specifically, when the support base 620 and the mating sleeve 613 of the support frame 610 are close to each other, the support base 620 is in contact with the mating sleeve 613. The rotation direction under the helical engagement is the first direction. Along the first direction, the end of the support roller 640 away from the support base 620 is located in front of the end close to the support base 620. When the support base 620 and the support frame 610 approach each other in the vertical direction, the rotation of the support base 620 drives the multiple sliding frames 630 and the support roller 640 to rotate synchronously. The support roller 640 rotates around its own axis while revolving with the sliding frame 630. Under the effect of its axis being tilted relative to the sliding direction of the sliding frame 630, the support roller 640 causes the sliding frame 630 to extend relative to the support base 620, thereby increasing the support area defined by the multiple support rollers 640.

[0045] In use, at least three support units are provided. The support rollers 640 of multiple support units are placed on the operating table or hospital bed to support the negative pressure cylinder 100, keeping it vertical. After negative pressure is drawn into the suction chamber within the negative pressure cylinder 100, the operator can release the negative pressure cylinder 100 and use the support mechanism 600 to keep it vertical, allowing the operator to perform the puncture operation with their hands free. If the negative pressure cylinder 100 tilts due to accidental contact, the support frame 610 presses down on the support seat 620 of at least one support unit on one side, causing the support seat 620 to rotate and drive the corresponding multiple sliding frames 630 and multiple support rollers 640 to rotate. The support area defined by the multiple support rollers 640 of the support unit on the compressed side increases, making the support more stable and preventing further tilting of the negative pressure cylinder 100, thus further ensuring the stability of the puncture process.

[0046] In this embodiment, a pressure relief port 140 is provided on the side wall of the negative pressure cylinder 100. The pressure relief port 140 is connected to the suction chamber, and a pressure relief valve 150 is installed on the pressure relief port 140. After the operation is completed, the suction chamber is connected to the outside by opening the pressure relief valve 150, which makes it easy to remove the negative pressure cylinder 100.

[0047] In this embodiment, the puncture needle 400 is marked with scale lines (not shown in the figure) along its axial direction to record the displacement of the puncture needle 400 relative to the negative pressure cylinder 100.

[0048] In use, the surgical skin negative pressure lifting device of the present invention involves placing multiple support units of the support mechanism 600 on the operating table or bed near the circumference of the patient's operating area. The support mechanism 600 provides stable support for the negative pressure cylinder 100. The operator holds the negative pressure cylinder 100 with one hand to ensure its lower end is in contact with the patient's skin and restricts its rotation. Simultaneously, the tension rollers 540 of the multiple tensioning mechanisms 500 are in contact with the patient's skin under the action of the first elastic element between the hinge rod 510 and the mounting ring 130. The operator's other hand reciprocates by rotating the screw 200, causing the threaded sleeve 300 to move up and down. When the threaded sleeve 300 moves upward, the volume of the suction chamber increases, and the pressure decreases. When the piston moves downward, it compresses the gas in the suction chamber into the gas channel within the telescopic frame, causing the tension rollers 540 to rotate and unfold the skin below the negative pressure cylinder 100 outward. After the threaded sleeve 300 moves up and down repeatedly, the patient's skin below the negative pressure cylinder 100 is stretched out, and the flared structure at the lower end of the negative pressure cylinder 100 can completely fit the patient's skin. Then, the threaded sleeve 300 moves upward, which can lift up part of the skin inside the negative pressure cylinder 100. Stop rotating the screw 200, and use the threaded engagement between the screw 200 and the threaded sleeve 300 to lock the position of the threaded sleeve 300. Then, release the negative pressure cylinder 100, and the operator can use both hands to operate the puncture needle 400 to operate on the protruding skin at the lower part of the negative pressure cylinder 100.

[0049] In some other embodiments, unlike the embodiments described above, the piston component is a suction cylinder 310, such as... Figure 11 As shown, the lower end of the suction cylinder 310 slides and seals against the inner wall of the negative pressure cylinder 100, while the upper end of the suction cylinder 310 extends out of the negative pressure cylinder 100. An elastic locking element 110 is provided at the upper end of the negative pressure cylinder 100, locking the position of the suction cylinder 310 when it moves upward to a preset position. A guide cylinder 120 is provided inside the negative pressure cylinder 100, passing through the suction cylinder 310. The lower end of the guide cylinder 120 is flared and flush with the lower end of the negative pressure cylinder 100, used to conform to the patient's skin. The puncture needle 400 passes through the guide cylinder 120 and acts on the patient's skin. The guide cylinder 120 is positioned so that its lower end conforms to the patient's skin to prevent the puncture needle 400 from affecting the negative pressure environment within the suction chamber during puncture.

[0050] Specifically, the suction cylinder 310 has a limiting groove, and the elastic locking member 110 includes a locking block and a fifth elastic member connecting the locking block and the negative pressure cylinder 100. Under the action of the fifth elastic member, the locking block abuts against the side wall of the suction cylinder 310 and engages with the limiting groove when the suction cylinder 310 moves upward to a preset position, locking the position of the suction cylinder 310. An unlocking cylinder 160 is provided outside the negative pressure cylinder 100, and a wedge surface is provided on the locking block. The unlocking cylinder 160 moves downward to push the wedge surface, causing the locking block to disengage from the limiting groove. During the process of the suction cylinder 310 reciprocating up and down to rotate the tension roller 540 and stretch the patient's skin, the suction cylinder 310 does not move upward to the limiting groove until the negative pressure cylinder 100 is fully in contact with the patient's skin. At this point, the resistance to upward movement of the suction cylinder 310 increases significantly. The suction cylinder 310 can then be moved upward to the limiting groove, and the locking block can be used to lock the position of the suction cylinder 310.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A surgical skin negative pressure lifting device for lifting the patient's skin to facilitate the insertion of a puncture needle, characterized in that: Includes a negative pressure cylinder, piston components, and tensioning mechanism; The negative pressure cylinder is set vertically, and the lower end has an flared structure for adhering to the patient's skin; The piston is installed in the negative pressure cylinder, and the lower end of the piston, the inner wall of the negative pressure cylinder and the patient's skin define a suction chamber. The piston can move up and down relative to the negative pressure cylinder. There are multiple tensioning mechanisms, evenly distributed around the circumference of the negative pressure cylinder and spaced apart. Each tensioning mechanism includes a telescopic frame and a tensioning roller. The telescopic frame is hinged to the negative pressure cylinder around a horizontal axis, and a first elastic element is provided between the telescopic frame and the negative pressure cylinder. The hinge axis between the telescopic frame and the negative pressure cylinder is the tangent of the negative pressure cylinder at the hinge position. A gas channel communicating with the suction chamber is provided inside the telescopic frame. A first one-way valve is provided at the end of the gas channel near the suction chamber to allow gas to enter the gas channel from the suction chamber. The tensioning roller is rotatably mounted at the end of the telescopic frame away from the negative pressure cylinder, and the rotation axis of the tensioning roller is parallel to the hinge axis of the negative pressure cylinder and the telescopic frame. The first elastic element causes the telescopic frame to rotate until the tensioning roller is in contact with the patient's skin. The tensioning roller is connected to the gas channel and rotates when air enters the gas channel, causing the patient's skin to spread away from the negative pressure cylinder. The piston moves upward to reduce the pressure in the suction chamber, and moves downward to squeeze the gas in the suction chamber through the gas channel, causing the tensioning roller to rotate.

2. The surgical skin negative pressure lifting device according to claim 1, characterized in that: The piston is a threaded sleeve, which is installed inside the negative pressure cylinder and sealed to the inner wall of the negative pressure cylinder. The negative pressure cylinder restricts the piston from rotating around the vertical axis. A screwing component is installed between the threaded sleeve and the negative pressure cylinder. The lower end of the screwing component is threaded to the piston, and the upper end passes through the upper end of the negative pressure cylinder and rotates with the negative pressure cylinder. The rotation of the screwing component causes the threaded sleeve to move up and down. The screwing component is a hollow tube with a flexible seal at the upper end. The puncture needle passes through the upper end of the screwing component and extends into the suction chamber.

3. The surgical skin negative pressure lifting device according to claim 1, characterized in that: The piston is a suction cylinder. The lower end of the suction cylinder slides and seals against the inner wall of the negative pressure cylinder. The upper end of the suction cylinder extends out of the negative pressure cylinder. An elastic locking element is provided at the upper end of the negative pressure cylinder. The elastic locking element locks the position of the suction cylinder when the suction cylinder moves upward to a preset position. A guide cylinder is provided inside the negative pressure cylinder, which passes through the suction cylinder. The lower end of the guide cylinder is flush with the lower end of the negative pressure cylinder and is used to fit against the patient's skin. The puncture needle passes through the guide cylinder and acts on the patient's skin.

4. The surgical skin negative pressure lifting device according to claim 3, characterized in that: The suction cylinder has a limiting groove, and the elastic locking component includes a locking block and a fifth elastic component connecting the locking block and the negative pressure cylinder. Under the action of the fifth elastic component, the locking block abuts against the side wall of the suction cylinder and cooperates with the limiting groove when the suction cylinder moves upward to the preset position to lock the position of the suction cylinder. An unlocking cylinder is provided outside the negative pressure cylinder, and a wedge surface is provided on the locking block. The unlocking cylinder moves downward to push the wedge surface so that the locking block disengages from the limiting groove.

5. The surgical skin negative pressure lifting device according to claim 1, characterized in that: A mounting ring is fixed to the outside of the negative pressure cylinder; the telescopic frame includes a hinge rod, a transition frame, and a mounting frame. One end of the hinge rod is rotatably mounted on the mounting ring and connected to the mounting ring through the first elastic element; a support platform is provided at the other end of the hinge rod; there are two mounting frames, located on both sides of the tension roller along the axial direction, and the two ends of the tension roller are rotatably mounted on the two mounting frames respectively; both mounting frames are slidably mounted on the support platform along the axial direction of the hinge rod, and a second elastic element is provided between the mounting frame and the support platform, which causes the tension rollers on the two mounting frames to abut against the patient's skin; the transition frame is slidably connected to the hinge rod along its axial direction, and both the transition frame and the hinge rod are hollow and connected internally. The interior of the hinge rod is connected to the suction chamber, and the first one-way valve is provided inside the hinge rod; impellers are provided at both ends of the tension roller, and a cover sleeved on the transition frame is provided outside the impellers. An air outlet is provided on the cover, and a second one-way valve that only allows gas to flow out is provided at the air outlet; the gas entering the transition frame causes the tension roller to rotate by blowing the impellers.

6. The surgical skin negative pressure lifting device according to claim 5, characterized in that: The mounting ring is a split structure, consisting of an upper and a lower connecting ring. The upper and lower connecting rings have multiple circumferentially distributed connecting slots on their adjacent sides. A duct pipe that passes through the negative pressure cylinder is installed in the connecting slot, and the duct pipe connects the suction chamber to the inside of the hinge rod.

7. A surgical skin negative pressure lifting device according to claim 6, characterized in that: The upper and lower closing rings are also provided with hinge slots that correspond one-to-one with the connecting slots on their close sides. The end of the hinge rod is provided with a hinge shaft. After the hinge shaft is engaged with the hinge slot on the upper or lower closing ring, the upper and lower closing rings are engaged and fixedly connected.

8. The surgical skin negative pressure lifting device according to claim 1, characterized in that: It also includes a support mechanism, which comprises a support frame and multiple support units. The support frame is fixed to the negative pressure cylinder, and the multiple support units are distributed circumferentially around the negative pressure cylinder. Each support unit includes a support base, multiple sliding frames, and multiple support rollers. The support base and the support frame are helically fitted in the vertical direction. A third elastic element is provided between the support base and the support frame. The multiple sliding frames are evenly distributed circumferentially around the support base, and each sliding frame is radially slidably mounted on the support base, with a fourth elastic element provided between it and the support base. Each support roller is rotatably mounted on a sliding frame about a horizontal axis, and the axis of the support roller is inclined relative to the sliding direction of the sliding frame. The inclination direction of the multiple support rollers relative to their corresponding sliding frames is consistent. When the support base and the support frame approach each other in the vertical direction, the rotation of the support base drives the multiple sliding frames and support rollers to rotate synchronously. While revolving with the sliding frame, the support rollers rotate about their own axes. Under the action of their axes being inclined relative to the sliding direction of the sliding frame, the support rollers cause the sliding frames to extend relative to the support base, thereby increasing the support area defined by the multiple support rollers.

9. A surgical skin negative pressure lifting device according to claim 1, characterized in that: The negative pressure cylinder has a pressure relief port on its side wall, which is connected to the suction chamber, and a pressure relief valve is installed on the pressure relief port.

10. A surgical skin negative pressure lifting device according to claim 1, characterized in that: The puncture needle is marked with graduations along its axis to record the displacement of the puncture needle relative to the negative pressure cylinder.

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