Negative pressure drainage structure and system based on dome support

Abstract

The utility model discloses a negative pressure drainage structure and system based on dome support, the negative pressure drainage structure is used for negative pressure drainage operation, the negative pressure drainage structure comprises a structure body and a through hole arranged on the structure body and used for drainage, the lower surface of the structure body is provided with a plurality of support bodies, and gaps between adjacent support bodies form drainage channels below the structure body; the upper surface of the structure body is provided with a plurality of hemispherical semi-cavity blind holes in one-to-one correspondence with the supporting bodies, and the semi-cavity blind holes and the supporting bodies form a dome support below the structure body. According to the dome supporting structure designed by the utility model, the problems of how to effectively maintain a drainage cavity and reduce indentations on a wound surface are simultaneously solved, and an effective conduction channel is formed on the surface of the porous foam layer through the supporting body structure at the bottom; and an upward movement space is provided for the supporting body under the negative pressure condition through the semi-cavity blind hole in the top.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of negative pressure closed drainage, specifically points to a negative pressure drainage structure and system based on dome support. BACKGROUND

[0002] The negative pressure closed drainage technology is a complete treatment system completed by three parallel continuous actions of "sealing wound surface", "providing negative pressure" and "connecting drainage", and the specific process includes:

[0003] The sealing of wound surface is completed by a foam material, and the sealing of wound surface is the most basic and necessary medical process for changing the open wound surface into the closed wound surface in clinical surgery; at the same time, the wound surface is artificially changed into a cavity capsule after being sealed, and the cavity capsule provides a working space for the next step of negative pressure.

[0004] The vacuum is provided by the external drainage pipeline and the negative pressure source; the negative pressure at this time and this place refers to the pressure in the cavity capsule space on the wound surface compared with the blood pressure in the capillary in the wound tissue; the pressure in the wound cavity capsule is much smaller than the pressure in the blood vessel, so it is called negative pressure; because the pressure in the capillary is much greater than the pressure outside the capillary, the negative pressure on the wound surface will directly affect the expansion and protrusion of the capillary wall; and the expansion and protrusion of the capillary wall will cause the space volume of the capillary cavity to increase; the increase of space and volume has two effects: one is that the blood flow and blood flow velocity are increased by 5-12 times or more, which provides the necessary amount of tissue mother cells, red blood cells rich in oxygen and platelet groups (PRP) rich in repair growth factors and various tissue protein amino acid components for wound repair; two, the continuous increase of the space and volume of the local wound surface will cause the network-like capillary to swell, twist and form a group on the vessel wall, thus forming a fresh and neat granular granulation tissue bed like a ruby.

[0005] The drainage is connected by connecting the negative pressure source and the cavity capsule on the wound surface by the drainage pipeline; the drainage provides a negative pressure source for the cavity capsule on the wound surface, so that the blood pressure in the capillary in the wound tissue is much greater than the pressure in the cavity capsule, so that the blood flow and blood flow velocity in the capillary are increased by 5-12 times or more than other tissues outside the wound; two, the contaminants, necrotic tissue and necrotic tissue debris, pus, tissue exudate and the like on the wound surface are continuously and quickly cleaned.

[0006] Thus, vacuum, sealing and drainage form a complementary and efficient treatment system, and vacuum, sealing and drainage are VSD.

[0007] However, there are still some defects in the clinical application, at least the following problems exist:

[0008] (1) The hydrophilic porous foam material is prone to dry and harden after 2-4 days of clinical application, resulting in a decrease in material resilience, a significant reduction in effective drainage space, a decrease in permeability, and gradual blockage. In addition, under the action of organic colloid such as pus, tissue fluid, exudate and blood, the foam material pores often adhere, the foam elasticity decreases, the foam material covered on the whole wound surface is dry and hard, and the drainage effect is greatly reduced.

[0009] (2) The drainage device with a partition or support structure can form a drainage cavity on the surface of the porous foam material, which can alleviate the decrease in the elasticity of the porous foam material. However, the partition or support structure will exert pressure on the surface of the porous foam material in the direction of the wound under the action of negative pressure, thereby forming obvious pressure marks on the surface of the patient's wound, which can easily affect the accurate judgment of the doctor during diagnosis.

[0010] (3) The existing drainage device is suitable for planar wounds, but for wounds with a cavity structure, even if it is cut to the appropriate size, it cannot fit snugly on the surface of the porous foam material and is prone to displacement and deformation. Practical new type content

[0011] In view of the deficiencies of the prior art, the utility model provides a negative pressure drainage structure and system based on dome support, which can reduce the pressure marks caused by the support on the wound under negative pressure conditions, while maintaining good drainage effect.

[0012] To achieve the above purpose, the utility model discloses a negative pressure drainage structure based on dome support for negative pressure drainage operation, including structure body and set up on structure body for drainage through -hole, its special place lies in, the surface of structure body close to wound is lower surface, the surface away from wound is upper surface, the lower surface of structure body is provided with a plurality of support, the gap between adjacent support forms drainage channel below structure body.

[0013] Further, the support is a columnar structure.

[0014] Further, the axial section of the support is a reverse triangle or a reverse trapezoid.

[0015] Further, the support body is a circular truncated cone structure tapered downward.

[0016] Further, the through hole is arranged apart from the half-cavity blind hole.

[0017] Further, the half-cavity blind hole protrudes from the lower surface of the structural body and has a bottom in the support body.

[0018] Further, the lower surface of the support body is a circular arc, and the curvature of the circular arc is consistent with the curvature of the half-cavity blind hole.

[0019] Further, the structural body is made of a thermosetting elastomer, rubber or thermoplastic elastomer material.

[0020] Further, the structural body is formed by a complex mold process, an injection molding process or a mold pressing process.

[0021] Further, the diameter of the support body is not greater than 10 mm, the height is not greater than 6 mm, and the depth of the half-cavity blind hole is greater than the thickness of the structural body.

[0022] Further, the hardness of the structural body ranges from 5 to 35 degrees, and the hardness of the support body ranges from 5 to 40 degrees.

[0023] The utility model also proposes a kind of inner cavity negative pressure drainage structure based on dome support, including structural body and the through hole for drainage being arranged on structural body, the side surface of structural body is evenly provided with several support bodies, and the other side surface is provided with several half-cavity blind holes of hemispherical shape corresponding to support body one by one, and the half-cavity blind hole and support body form dome support on the side of structural body;

[0024] The dome support of the structural body is folded along the center line outward, forming two pieces of structural body with connected bottoms and aligned tops, the half-cavity blind holes of the two pieces of structural body are opposite to each other, and after the air in all two aligned half-cavity blind holes is extruded and discharged, the pressure between the two half-cavity blind holes makes the two pieces of structural body tightly fit.

[0025] Further, the structural body is used in cooperation with a porous foam layer, and the porous foam layer is wrapped outside the structural body and contacts the dome support.

[0026] Further, the support body is a circular truncated cone structure tapered downward.

[0027] Further, the structural body is made of a thermosetting elastomer, rubber or thermoplastic elastomer material.

[0028] Further, the drainage tube is arranged between the two folded structures.

[0029] The utility model discloses a kind of negative pressure drainage systems based on dome support, including above-mentioned one based on dome support negative pressure drainage structure and sucking disc, the bottom of the sucking disc is communicated with through-hole, top is communicated with negative pressure source by drainage tube.

[0030] Further, the structure body is used with porous foam layer, one side of the porous foam layer is contacted with dome support, and the other side is contacted with wound.

[0031] Further, the side of the structure body close to wound surface is flocked on the surface of porous foam layer after hot baking by coating process.

[0032] Further, the structure body and porous foam layer are fixedly connected by suturing or gluing, and the structure body and porous foam layer can be cut and spliced according to the size of wound surface.

[0033] The negative pressure drainage structure and system based on dome support are used with porous foam layer in negative pressure drainage treatment, the support body arranged on the lower surface of the structure body forms a cavity between the structure body and the porous foam layer below, so as to form an effective conduction channel on the surface of the porous foam layer. Under negative pressure, the half-cavity blind hole above the support body provides a space for the upward movement of the support body, so that the pressure on the lower surface of the support body is gradually reduced through the porous foam layer, and the pressure marks on the surface of the wound are also reduced. After the negative pressure device stops suction, the pressure in the half-cavity blind hole above the support body returns to one atmosphere, and the air in the half-cavity blind hole makes the support body move downward to keep elastic. All these are due to the change of the suction force of the negative pressure source, which causes the curvature of the contact surface between the dome and the endothelial cells to gradually increase or decrease.

[0034] Compared with the prior art, the utility model has the following beneficial technical effects:

[0035] 1. The dome support solves the problems of how to effectively maintain the drainage cavity and reduce the pressure marks on the wound surface. The support body structure at the bottom forms an effective conduction channel on the surface of the porous foam layer, and the half-cavity blind hole at the top provides a space for the upward movement of the support body under negative pressure.

[0036] 2. The top of the dome support is designed as a semi-cavity blind hole with a hemispherical arc groove, and the bottom of the semi-cavity blind hole is opposite to the support body. Before the negative pressure drainage operation, the porous foam layer and negative pressure drainage structure covering the wound are covered with a medical sealing film. The air in the semi-cavity blind hole on the upper surface of the structure body is sealed in the hole by the medical sealing film. Under negative pressure conditions, an elastic cavity is formed above the support body. Repeated expansion in this way forms a plane filled with countless micro balloons.

[0037] 3. The support body is designed as a downwardly tapering frustum structure. The gradual and gentle deformation of the curvature of the support body's arc surface provides a space for negative pressure drainage treatment of the wound that can adapt to drastic pressure changes, while ensuring continuous and effective drainage and continuous rebound.

[0038] 4. The dome-supported internal cavity negative pressure drainage structure is suitable for body cavities and can provide an elastic conduction structure for deep cavities;

[0039] 5. When the drainage structure designed in this utility model is used clinically on uneven wound surfaces and cavity gaps, it will not cause displacement or shearing of upper and lower layers under negative pressure conditions. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the main structure of Embodiment 1 of this utility model;

[0041] Figure 2 This is a bottom view of the structure of Embodiment 1 of this utility model;

[0042] Figure 3 This is a top view of Embodiment 1 of the present invention.

[0043] Figure 4 This is a schematic diagram of the dome support structure with a circular axial cross-section in Embodiment 1 of this utility model;

[0044] Figure 5 This is a schematic diagram of the dome support structure with a trapezoidal axial cross-section in Embodiment 1 of this utility model;

[0045] Figure 6 This is a schematic diagram of the dome support structure with a triangular axial cross-section in Embodiment 1 of this utility model;

[0046] Figure 7 This is a schematic diagram of the dome support structure with an axial cross-section in Embodiment 1 of this utility model;

[0047] Figure 8 This is a schematic diagram of the combination of the structural body and the porous foam layer in Embodiment 1 of this utility model;

[0048] Figure 9It is a structure schematic view of the embodiment 2 of the utility model;

[0049] Figure 10 It is a structure schematic view of the embodiment 3 of the utility model;

[0050] Figure 11 It is a structure schematic view of the embodiment 4 of the utility model;

[0051] Figure 12 It is a structure schematic view of the embodiment 5 of the utility model;

[0052] Figure 13 It is a structure schematic view of the embodiment 6 of the utility model;

[0053] Figure 14 It is a contrast schematic view of prior device and the embodiment of the utility model for negative pressure drainage;

[0054] Figure 15 It is a result contrast schematic view of prior device and the embodiment of the utility model for negative pressure drainage.

[0055] In the drawing: structure body 1, through hole 2, drainage channel 3, support body 4, half cavity blind hole 5, dome support 6, suction disc 7, porous foam layer 8, drainage tube 9, sealing film 10. Specific implementation

[0056] The utility model will be further described in detail in combination with the drawings and specific embodiments.

[0057] Embodiment 1

[0058] As Figures 1-3 Shown, the embodiment of the utility model proposes a kind of negative pressure drainage structure based on dome support, for negative pressure drainage operation, including structure body 1 and the through hole 2 for drainage arranged on structure body 1, the lower surface of structure body 1 is uniformly provided with a plurality of support bodies 4, the gap between adjacent support bodies 4 forms drainage channel 3 below structure body 1;The upper surface of structure body 1 is uniformly provided with a plurality of hemispherical half cavity blind holes 5 corresponding to support body 4 one by one, and half cavity blind hole 5 and support body 4 form dome support 6 below structure body 1.

[0059] The through hole 2 on structure body 1 can be multiple, and is spaced apart from half cavity blind hole 5.

[0060] The shape, structure, arrangement mode of support body 4 has multiple design forms, can be adaptively adjusted according to actual demand.

[0061] In one embodiment of this utility model, the support body 4 is a columnar structure, and its axial cross-section is one or a combination of two of the following: triangular, trapezoidal, circular, semi-circular, frustum, elliptical, rectangular, and parallelogram. The structure of the support body 4 with a circular axial cross-section is as follows: Figure 4 As shown, the structure of the support body with a trapezoidal axial cross-section is as follows. Figure 5 As shown, the structure with a triangular axial cross-section is as follows: Figure 6 As shown, the structure with an axial cross-section in the shape of a frustum is as follows: Figure 7 As shown.

[0062] In one embodiment, the support body 4 is a frustum-shaped structure that tapers downwards. The volume of the support body 4 tapers downwards from the structure body 1, while the volume of the drainage channel 3 gradually expands downwards along the surface of the support body 4.

[0063] The structural body 1 and the support body 4 are made of thermosetting elastomer, rubber, or thermoplastic elastomer. This structure can be formed by molding, injection molding, or compression molding. The effective porosity of the structural body 1 is preferably 20%–50%; the bottom diameter of the support body 4 is no greater than 8 mm, and the height is no greater than 5 mm. The hardness range of the structural body 1 is 20–35 degrees, and the hardness range of the support body 4 is 20–40 degrees.

[0064] When using, such as Figure 8 As shown, the structural body 1 is placed on the porous foam layer 8, or the two are fixedly connected by suturing or adhesive bonding. The shape of the structural body 1 can be cut and spliced ​​according to the shape and size of the wound or cavity. The fixing points between the structural body 1 and the porous foam layer 8 are evenly distributed to ensure effective fixation within the cut area during use. The bottom of the support 4 contacts the porous foam layer 8, so that the gaps between adjacent support bodies 4 form drainage channels 3 below the structural body 1.

[0065] Both the structural body 1 and the porous foam layer 8 are flexible structures. The structural body 1 can be a sheet structure, or a roughly sheet structure with irregular shapes such as depressions, protrusions, twists, and folds.

[0066] Under negative pressure, the drainage fluid is conducted from the porous foam layer 8 to the drainage channel 3 and drained out through the through hole 2. As the volume of the support 4 gradually decreases from the main body 1 downwards, under negative pressure, the lower porous foam layer 8, after being squeezed and deformed, will contact the side of the support 4. The arc-shaped side increases the contact area between the porous foam layer 8 and the support 4, thereby reducing the pressure on the support 4 and thus reducing the pressure on the wound. The structure of the dome support 6 realizes the gradual enhancement of negative pressure therapy and provides local negative pressure to the wound. It transforms the seemingly contradictory relationship between negative pressure rebound and protecting the integrity of granulation endothelial cells into a perfect, complementary, and mutually reinforcing process.

[0067] When the negative pressure drainage is performed, the porous foam layer 8 is first laid on the wound surface, the structural body 1 is placed above the porous foam layer 8, the support body 4 below the structural body 1 is in contact with the porous foam layer 8, the sealing film 10 is used to cover the structural body 1 and the porous foam layer 8 below, the sealing is completed, the sealing film 10 seals part of the air above the structural body 1 in the semi-cavity blind hole 5; then, the external negative pressure source gives the cavity capsule a negative pressure (Vacuum), under the action of the negative pressure, the pressure in the capillary vessels of the wound is much greater than the pressure outside the capillary vessels, thus the negative pressure on the wound surface will directly affect the expansion and protrusion of the capillary vessel wall in the wound; next, the suction disc on the structural body 1 is connected with the negative pressure source through the drainage tube, the drainage (Drainage) is connected, the porous foam layer 8 is deformed and extruded in the direction of the negative pressure source under the action of the negative pressure, the pressure of the dome support 6 below the structural body 1 is conducted to the wound surface through the deformed porous foam layer 8, and the compression of the capillary endothelial cells on the granulation tissue bed is started; the drainage liquid is conducted to the drainage channel 3 between the support body 4 below the structural body 1 through the porous foam layer 8, and is drained out through the through hole 2 and the suction disc 7, as the negative pressure increases, the porous foam layer 8 continues to deform and compress, the contact between the porous foam layer 8 and the outer surface of the support body 4 increases, the drainage channel 3 gradually decreases, while the air in the semi-cavity blind hole 5 at the top of the dome support 6 reserves space for the upward movement of the support body 4, and a buffer capsule after another is formed above the dome support 6, like a plane body formed by countless tiny balloons, the buffer capsule greatly reduces the pressure marks caused by the support body 4 to the wound surface under the strong negative pressure. After the drainage is completed, the pressure in the sealing film 10 decreases, the porous foam layer 8 is no longer subjected to the negative pressure, starts to rebound, the air in the semi-cavity blind hole 5 above the structural body 1 also gradually recovers to an atmospheric pressure, gives the dome support 6 a downward restoring force, the contact area between the support body 4 and the porous foam layer 8 decreases, thus the volume of the drainage channel 3 is gradually recovered, the support body 4 maintains the relative space of the structural body 1 and the porous foam layer 8, and thus the effective drainage gap is recovered.

[0068] Embodiment 2

[0069] The embodiment provides a negative pressure drainage system based on a dome support, which comprises the negative pressure drainage structure based on the dome support and the suction disc 7, the bottom of the suction disc 7 is in communication with the through hole 3, and the top of the suction disc 7 is in communication with the negative pressure source through the drainage tube. In use, the porous foam layer 8 is placed below the structural body 1, one side of the porous foam layer 8 is in contact with the dome support 6, and the other side of the porous foam layer 8 is in contact with the wound, and the negative pressure drainage structure based on the dome support forms an elastic conducting layer above the porous foam layer 8.

[0070] The surface of the structure body 1 close to the wound side is connected with the porous foam layer 8, and the surface of the structure body 1 far from the wound side is communicated with one or more suction cups 7, which is convenient for sealing with a sealing film 10, as shown in Figure 9 The sealing film 10 is provided with a drainage hole, the skirt of the suction cup 7 is attached to the sealing film 10, and the middle cavity of the suction cup 7 is opposite to the position of the drainage hole on the sealing film 10.

[0071] After sealing, the suction cup 7 is detachably connected with an external negative pressure device and a drainage bag, after being connected, the external negative pressure device is started, and the whole system starts negative pressure suction.

[0072] When the negative pressure drainage structure is combined with the negative pressure source of the supporting treatment system, an ecological process of removing harmful substances and providing repair materials is formed. With the change of the suction force of the negative pressure source, the curvature of the contact surface between the dome support and the endothelial cells is gradually changed in a wave shape by using the structural characteristics of the dome support, and the treatment effect of the repeated gradual change is that the process of local granulation growth and inflammatory factor removal exhibits a clear ecological pattern with rolling and undulating changes.

[0073] Example 3

[0074] The embodiment provides a negative pressure drainage system based on a dome support, and the difference from the embodiment 2 is that the structure body 1 close to the wound side is hot-dried by coating process and then is planted on the surface of the porous foam layer 8.

[0075] When the utility model is used for a body surface wound, the body surface is easy to lose water and dry, the lower surface of the structure body 1 is designed as a PVA flocked structure or the structure body 1 is embedded with a PVA wound material, which makes the material and the wound tissue more affinity, and provides the best moist healing environment for the healthy growth of granulation endothelial cells; when used for an internal wound cavity, the inner wall of the deep cavity is always wet, and the utility model is soft and easy to bend, so the dome support structure avoids pressing the granulation tissue to the maximum extent, so compared with simply using PVA material, PU material and gauze material, the utility model directly used will significantly improve the wound treatment effect.

[0076] Example 4

[0077] The embodiment proposes a negative pressure drainage system based on dome support, which is different from the embodiment 2 in that the structural body 1 and the porous foam layer 8 are fixedly connected through sewing or gluing. The shape of the structural body 1 can be cut and spliced according to the shape and size of the wound surface or wound cavity. The fixing points between the structural body 1 and the porous foam layer 8 are uniformly distributed, which ensures effective fixation within the cutting area when cutting and using. The dome support contacts the porous foam layer 8, so that the downward convex arc surface of the lower surface of the support body 4 forms an upward tapered drainage channel 3 on the upper surface of the porous foam layer 8.

[0078] Embodiment 5

[0079] The embodiment is different from the embodiment 1 in that the half-cavity blind hole 5 of the dome support 6 protrudes from the lower surface of the structural body 1 and is located in the support body 4. The depth of the half-cavity blind hole 5 is greater than the thickness of the structural body 1, which ensures that the inner cavity volume of the half-cavity blind hole 5 can meet the requirement of forming an elastic conductive layer.

[0080] As shown in Figure 10 , the lower surface of the support body 4 is a circular arc, and the curvature of the circular arc is consistent with the curvature of the half-cavity blind hole 5, so as to enhance the elastic effect.

[0081] Embodiment 6

[0082] As shown in Figure 11 , the embodiment proposes an inner-cavity negative pressure drainage structure based on dome support, which includes a structural body 1 and a through hole 3 arranged on the structural body 1 for drainage. A plurality of support bodies 4 are uniformly arranged on one side surface of the structural body 1, and a plurality of half-cavity blind holes 5 corresponding to the support bodies 4 are arranged on the other side surface of the structural body 1. The half-cavity blind holes 5 and the support bodies 4 form a dome support 6 on one side of the structural body 1.

[0083] Fold the dome support 6 of the structural body 1 outward along the center line, forming two pieces of structural body 1 with the bottom connected and the top aligned. The half-cavity blind holes 5 of the two pieces of structural body 1 are opposite to each other. After the air in all the two aligned half-cavity blind holes 5 is extruded and discharged, the pressure between the two half-cavity blind holes 5 makes the two pieces of structural body 1 tightly fit.

[0084] Embodiment 7

[0085] The embodiment is different from the embodiment 6 in that the half-cavity blind hole 5 of the dome support 6 protrudes from the lower surface of the structural body 1 and is located in the support body 4, as shown in Figure 12 . The depth of the half-cavity blind hole 5 is greater than the thickness of the structural body 1, which ensures that the inner cavity volume of the half-cavity blind hole 5 can meet the requirement of forming an elastic conductive layer.

[0086] The lower surface of the support body 4 is a circular arc, and the curvature of the circular arc is consistent with the curvature of the half-cavity blind hole 5, so as to enhance the elastic effect.

[0087] Embodiment 8

[0088] This embodiment proposes a negative pressure drainage system based on dome support, including the inner cavity negative pressure drainage structure based on dome support in embodiment 4 and drainage tube 9, folding the dome support 6 of the structure body 1 outward along the center line, forming two pieces of structure body 1 with the bottom connected and the top aligned, and inserting the drainage tube 9 between the two pieces of structure body 1 after folding, as shown in Figure 13 The drainage tube 9 communicates with the negative pressure source through the sealing film 10.

[0089] The steps of using the utility model to operate negative pressure drainage are as follows:

[0090] 1. According to the conventional method, debridement and hemostasis are performed, on the basis of complete debridement and hemostasis, according to the size and depth of the wound surface and according to the clinical needs, the structure body 1 of appropriate size is trimmed or spliced;

[0091] 2. Fold the structure body 1, insert the drainage tube 9 into the structure body 1, contact the drainage tube 9 on one side of the half-cavity blind hole 5, and then extrude and discharge the air in the aligned half-cavity blind hole 5, the drainage tube 9 is clamped in the middle of the structure body 1, and the aligned and compressed half-cavity blind hole 5 makes the structure body 1 tightly fit; the drainage tube 9 needs to be completely inserted into the structure body 1, otherwise the overall hardness is insufficient to be inserted into the sinus;

[0092] 3. In the clean condition (according to the aseptic standard operation), the hemostatic forceps is used to clamp and insert the negative pressure drainage device into the sinus, and one side of the dome support 6 contacts the porous foam layer 8, and is appropriately sutured and fixed if necessary; the half-cavity blind hole

[0093] 4. The sinus opening is completely sealed by pasting and covering the medical sealing film 10;

[0094] 5. Connect the outlet of the drainage tube 9 to the negative pressure source, adjust the negative pressure range between 85mmHg~450mmHg (16.67KPa~60KPa) according to the wound condition, and take out after continuous suction for 5~7 days.

[0095] Embodiment 9

[0096] This embodiment proposes a negative pressure drainage system based on dome support, which is different from embodiment 8 in that the side of the structure body 1 close to the wound surface is hot-dried by coating process and flocked on the surface of the porous foam layer 8.

[0097] Embodiment 10

[0098] The embodiment proposes a negative pressure drainage system based on dome support, which is different from the embodiment 8 in that the structural body 1 is fixedly connected with the porous foam layer 8 through sewing or gluing. The shape of the structural body 1 can be cut and spliced according to the shape and size of the wound surface or wound cavity.

[0099] The utility model can be used for body surface wound and internal wound cavity, when used for body surface wound, the utility model can rebound under negative pressure and continuously moisturize, especially when the utility model is used with hydrophilic PVA foam, the material can be kept moist for more than two weeks; when used for internal wound cavity, the inner wall of deep cavity is always moist, and the utility model is soft and easy to bend, so the support structure avoids pressing tissue to the maximum extent, so compared with using PVA material, PU material and gauze material, the utility model can significantly improve the treatment effect of body surface wound and internal wound cavity. The utility model has excellent treatment effect on complex terrain body surface wound and internal wound cavity, and is suitable for perineum, anus, axillary part, submaxillary burn, explosion injury such as abdominal penetrating injury or abdominal explosion injury, laceration and limb crushing explosion injury. Because the gradually gentle reduction of the arc curvature of the support body, the absolute support height reaches the relatively optimal value required by wound healing physiology.

[0100] In order to show the use effect of the utility model, the negative pressure drainage device with ordinary support structure (specifically adopting the drainage structure (PCT patent application number: PCT / CN2024 / 072168) of full wound surface continuous and uniform negative pressure conduction) and the negative pressure drainage device based on dome support proposed by the utility model are used to implement negative pressure drainage operation on the arm skin of a healthy person as shown in the picture Figure 14 The left arm in the picture uses the negative pressure drainage structure with flat top and protrusions at the bottom, and the right arm in the picture uses the negative pressure drainage structure based on dome support with half-cavity blind hole at the top; the negative pressure is set to 200mmHg, and the time is 3 hours, and the use effect is as shown in the picture Figure 15As shown in the picture, the common support negative pressure drainage structure on the left of the picture leaves obvious, uneven pressure mark on the skin, the dome support negative pressure drainage structure on the right of the picture leaves almost invisible red mark on the skin, and the skin surface is smooth. From the results of the above picture, it can be seen that the negative pressure drainage device based on dome support is obviously superior to the use effect of the conventional structure when the short time negative pressure drainage is implemented on the skin of a healthy person, if it is applied to the wound of a patient, it can reduce the pain of the patient, bring good news to the patient, and enable the doctor to clearly see the wound granulation growth state, help the doctor to make correct diagnosis. The negative pressure drainage device based on dome support has the advantages that due to the multi-support design, the drainage is smooth and does not appear to be blocked; when the PVA material is combined for use, the device provides a path that does not dry hard and collapse, and has a certain moisturizing effect, so that the hydrophilic PVA material almost does not dry and harden, and the resilience and permeability are also greatly improved; easy to seal, easy to flush, and easy to drain, so the treatment effect and efficiency are significantly improved.

[0101] The specific embodiments of the utility model are described in detail above, but it is only as an example, the utility model is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modification and replacement to the utility model are also within the scope of the utility model. Therefore, equivalent transformation and modification made without departing from the spirit and scope of the utility model should be covered within the scope of the utility model.

Claims

1. A dome support based negative pressure drainage structure for negative pressure drainage operation, comprising a structure body (1) and a through hole (2) arranged on the structure body (1) for drainage, characterized in that: The lower surface of the structure body (1) is provided with a plurality of support bodies (4), and the gap between adjacent support bodies (4) forms a drainage channel (3) on the lower surface of the structure body (1); the upper surface of the structure body (1) is provided with a plurality of hemispherical half-cavity blind holes (5) corresponding to the support bodies (4) one by one, and the half-cavity blind holes (5) and the support bodies (4) form a dome support (6) on the lower surface of the structure body (1).

2. The vacuum-assisted drainage structure based on a dome support according to claim 1, characterized in that: The support body (4) is a columnar structure.

3. The vacuum-assisted drainage structure based on a dome support according to claim 1, characterized in that: The axial section of the support body (4) is a reverse triangle or a reverse trapezoid.

4. The vacuum-assisted drainage structure based on a dome support according to claim 1, characterized in that: The support body (4) is a circular truncated cone structure that gradually shrinks downward.

5. The vacuum-assisted drainage structure based on a dome support according to claim 1, characterized in that: The through hole (2) is arranged in a spaced manner with the half-cavity blind hole (5).

6. The vacuum-assisted drainage structure based on a dome support according to claim 1, characterized in that: The half-cavity blind hole (5) protrudes from the lower surface of the structure body (1) and has a bottom in the support body (4).

7. The vacuum-assisted drainage structure based on a dome support according to claim 1, characterized in that: The lower surface of the support body (4) is a circular arc, and the curvature of the circular arc is consistent with the curvature of the half-cavity blind hole (5).

8. The vacuum-assisted drainage structure based on a dome support according to claim 1, characterized in that: The structure body (1) is made of a thermosetting elastomer, rubber or thermoplastic elastomer material.

9. The vacuum-assisted drainage structure based on a dome support according to claim 1, characterized in that: The structure body (1) is formed by a complex mold process, an injection molding process or a mold pressing process.

10. The vacuum-assisted drainage structure based on a dome support according to claim 1, characterized in that: The diameter of the support body (4) is not greater than 10 mm, and the height is not greater than 6 mm, and the depth of the half-cavity blind hole (5) is greater than the thickness of the structure body (1).

11. The vacuum-assisted drainage structure based on a dome support according to claim 1, characterized in that: The hardness of the structure body (1) ranges from 5 to 35 degrees, and the hardness of the support body (4) ranges from 5 to 40 degrees.

12. A negative pressure drainage structure based on a dome support, comprising a structure body (1) and a through hole (2) arranged on the structure body (1) for drainage, characterized in that: The structure body (1) is uniformly provided with a plurality of support bodies (4) on one side surface, and the other side surface is provided with a plurality of hemispherical half-cavity blind holes (5) corresponding to the support bodies (4) one by one, and the half-cavity blind holes (5) and the support bodies (4) form a dome support (6) on one side of the structure body (1); The dome support (6) of the structure body (1) is folded outward along the center line to form two pieces of structure body (1) with the bottom connected and the top aligned, the half-cavity blind holes (5) of the two pieces of structure body (1) are opposite to each other, and after the air in all two aligned half-cavity blind holes (5) is extruded and discharged, the pressure between the two half-cavity blind holes (5) makes the two pieces of structure body (1) tightly fit.

13. The vacuum-assisted drainage structure based on a dome support according to claim 12, characterized in that: The structure body (1) is used in cooperation with a porous foam layer (8), and the porous foam layer (8) is wrapped on the outer side of the structure body (1) and contacts the dome support (6).

14. The vacuum-assisted drainage structure based on a dome support according to claim 12, characterized in that: The support body (4) is a circular truncated cone structure that gradually shrinks downward.

15. The vacuum-assisted drainage structure based on a dome support according to claim 12, characterized in that: The structure body (1) is made of a thermosetting elastomer, rubber or thermoplastic elastomer material.

16. The vacuum-assisted drainage structure based on a dome support according to claim 12, characterized in that: A drainage tube (9) is inserted between the two folded structure bodies (1).

17. A dome supported negative pressure wound therapy system, characterized by: A suction disc (7) based on the negative pressure drainage structure of the dome support according to any one of claims 1-11, the bottom of the suction disc (7) is communicated with the through hole (2), and the top is communicated with a negative pressure source through a drainage tube.

18. The dome supported negative pressure wound therapy system of claim 17, wherein: The structure body (1) is used in cooperation with a porous foam layer (8), and one side of the porous foam layer (8) contacts the dome support (6), and the other side contacts the wound.

19. The dome supported negative pressure wound therapy system of claim 17, wherein: The structure body (1) is planted on the surface of the porous foam layer (8) by flocking after being heated by a coating process.

20. The dome supported negative pressure drainage system of claim 17, wherein: The structure body (1) and the porous foam layer (8) are fixedly connected by sewing or gluing.

21. A dome supported negative pressure wound therapy system, characterized by: The negative pressure drainage structure based on the dome support comprises the dome support and the suction disc (7) in communication with the through hole (2) and connected with the negative pressure source through the drainage pipe.

22. The dome supported negative pressure drainage system of claim 21, wherein: The structure body (1) is planted on the surface of the porous foam layer (8) by flocking after being heated by a coating process.

23. The dome supported negative pressure drainage system of claim 21, wherein: The structure body (1) and the porous foam layer (8) are fixedly connected by sewing or gluing.

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