CN113082309A - A tubulose negative pressure drainage ware for orthopedics - Google Patents
A tubulose negative pressure drainage ware for orthopedicsDownload PDFInfo
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- CN113082309A CN113082309ACN202110363067.1ACN202110363067ACN113082309ACN 113082309 ACN113082309 ACN 113082309ACN 202110363067 ACN202110363067 ACN 202110363067ACN 113082309 ACN113082309 ACN 113082309A
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- inner tube
- tube
- negative pressure
- outer tube
- sponge
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0021—Catheters; Hollow probes characterised by the form of the tubing
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0043—Catheters; Hollow probes characterised by structural features
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
- A61M25/0068—Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
- A61M25/007—Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biophysics (AREA)
- Pulmonology (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Media Introduction/Drainage Providing Device (AREA)
- External Artificial Organs (AREA)
Abstract
Translated fromChinese
Description
Technical Field
The invention belongs to the technical field of medical instruments, and particularly relates to a tubular negative pressure drainage device for orthopedics.
Background
The negative pressure drainage device is a medical appliance for clinical orthopaedics drainage, which guides body fluid such as pus, blood, liquid and the like exuded or accumulated on the wound surface of human tissue with surface defect or sleeve removal to the outside of a body, prevents the accumulation and infection of the wound surface liquid and promotes the healing of the wound. The orthopaedics negative pressure drainage device applied clinically has various types and is generally made of materials such as sponge, sterile sealing membrane, silicon rubber drainage tube and the like. When the device is used, the sponge part is placed at the drainage position of the wound surface with skin defect or sleeve removal, a sealing protective film is covered, the sealing film is punctured and then is connected with the drainage connecting pipe and further is connected with other external devices, such as a drainage bottle, the terminal is connected with a ward device with a negative pressure suction port, and drainage is carried out to the outside of the body under the action of the negative pressure suction port.
The prior drainage tube has the following defects and shortcomings: (1) the existing drainage tube has insufficient drainage and is easy to be infected by hematocele inside a wound; (2) because the drainage tube is not externally connected with a pressure gauge and is operated by using the suction bulb, the pressure of each operation is unknown, the pressure is uncontrollable, and even if the suction control is the same, the pressure of each side hole can not reach the same, so that the drainage tube can not be applied to special positions such as thighbones, brain tissues, intestinal canals and the like; (3) the existing drainage tube is easy to block in the using process.
Traditional vacuum aspiration ware is to the surface of a wound of sinus type, and the difficulty is placed to the sponge part, need place sinus bottom to the sponge part is complete completely to guarantee that no dead space remains, reach the effect of abundant drainage, but be very troublesome thing when changing the sponge, need open sinus wound and just can take out the sponge, and the sponge leads to tiny granule to drop because of the adhesion when taking out, appears the sponge sometimes even and drops the difficulty that can't take out. Therefore, there is an urgent need for a drainage device that addresses the difficulties and related problems associated with sponge replacement.
Disclosure of Invention
The invention aims to provide a tubular negative pressure drainage device for orthopedics, which solves the problems that the sponge is troublesome to replace and cannot be taken out due to falling off of the existing drainage device.
The technical scheme adopted by the invention is as follows: the utility model provides a tubulose negative pressure drainage ware for orthopedics, is including being located the inside inner tube of wound and being located the outside outer tube of wound, and the top and inner tube and the outer tube that the outer tube is located the inner tube are linked together, and it has the even side opening of a plurality of distribution to open on the lateral wall of inner tube, and the distance between the top of inner tube to the adjacent side opening in bottom is the same, and the aperture of side opening is not of uniform size, and the inside VSD sponge of filling of inner tube.
The technical solution adopted by the invention is also characterized in that,
the pore size distribution of the side holes meets the following requirements:
in the formula: the section of the pipe from the hole k to the hole k +1 is a kth section of pipe, k is more than or equal to 1, sdkIs the cross-sectional area of the hole k, ρ is the density of the pipe, g is the acceleration of gravity, hfFor on-way head loss, p0Is the suction at the outlet of the inner tube, pkIs the suction of the kth section of pipe, sdkThe cross-sectional area of the hole k.
The bottom of the inner pipe is of a closed structure.
The outer pipe is of a double-layer sleeve structure, and the inner diameter of the outer pipe is smaller than that of the inner pipe.
One end of the outer tube far away from the inner tube is connected with a negative pressure suction port.
The outer tube is equipped with the baffle with the linking department level of inner tube, and the baffle is the loop configuration, and the outward flange round of baffle is integrated structure with inner tube and outer tube respectively.
The end of the outer pipe far away from the inner pipe is a hose.
The invention has the beneficial effects that: in the device, the surface of a sponge placed at the bottom of a wound or sinus at the far end is provided with a layer of inner tube, the side wall of the inner tube is provided with a side hole, so that the uniform stress of the side wall of the wound or sinus during the negative pressure suction process can be ensured, the outer tube is designed into a double-layer sleeve, the inner diameter of the outer tube is smaller than that of the inner tube, the sponge of the tubular negative pressure drainage device is ensured not to fall off, and the sponge can be completely taken out in a very aspect when needing to be taken out, so that the generation of dead space is avoided, and the healing of the wound is accelerated.
Drawings
FIG. 1 is a schematic structural diagram I of a tubular negative pressure drainage device for orthopedics according to the invention;
FIG. 2 is a schematic diagram of the design of aperture size according to the present invention;
FIG. 3 is a schematic structural diagram II of a tubular negative pressure drainage device for orthopedics according to the invention;
FIG. 4 is a schematic structural diagram III of a tubular negative pressure drainage device for orthopedics department.
In the figure: 1. the device comprises an inner pipe, 2 an outer pipe, 3 side holes, 4 baffles and 5 VSD sponge.
Detailed Description
The invention is further illustrated with reference to the accompanying drawings and the detailed description.
As shown in fig. 1, the structural schematic diagram of the tubular negative pressure drainage device for orthopedics of the present invention includes aninner tube 1 located inside a wound and anouter tube 2 located outside the wound, theouter tube 2 is located at the top of theinner tube 1, theinner tube 1 is communicated with theouter tube 2, theinner tube 1 is used for liquid inlet, theouter tube 2 is used for liquid outlet, the bottom end of theinner tube 1 is a closed structure, the side wall of theinner tube 1 is provided with a plurality ofside holes 3 uniformly distributed, theside holes 3 through theinner tube 1 are used for liquid inlet, andVSD sponge 5 is filled in theinner tube 1.
One end of theouter tube 2 far away from theinner tube 1 is connected with a negative pressure suction port.
The aperture size of side opening 3 differs, and is the same from the top ofinner tube 1 to the distance between the adjacent side opening 3 in bottom, and the aperture size distribution of side opening 3 satisfies following requirement:
in the formula: k holes are arranged from the top to the bottom of the inner pipe, k is 1,2 and …, the section of the pipe from the hole k to the hole k +1 is the kth section of the pipe, and s is the section of the pipedkIs the cross-sectional area of the hole k, ρ is the density of the pipe, g is the acceleration of gravity, hfFor on-way head loss, p0Is the suction at the outlet of the inner tube, pkIs the suction of the kth section of pipe, sdkThe cross-sectional area of the hole k.
As shown in fig. 2, one end of the hole k is externally connected with a negative pressure suction port, and k holes are formed from the top to the bottom of the inner tube, where k is the same as that of the hole k1,2, …, the section of the pipe from the hole k to the hole k +1 is a k-th section of the pipe, and the section of the inlet of the k-th section of the pipe is A in cross sectionkAnd the outlet cross-sectional area is A'k. For the kth tube, it can be obtained according to Bernoulli's equation
Wherein p iskIs suction of the inlet of the k-th segment pipe, p'kIs the suction at the outlet of the kth section of pipe, rho is the density, vkIs the flow velocity of the kth segment of the tube, v'kIs the flow velocity of the kth section of pipe, g is the acceleration of gravity, hfIs the loss of head along the way.
According to the law of conservation of mass, the following can be obtained:
Qk＝Akvk＝Q′k＝A′kv′k (0.2)
wherein the cross-sectional area of the hole k is sdkAt a flow velocity vdk，QKIs the volume flow through the orifice k inlet, Q'kFor volumetric flow out through hole k, the flow into the tube through hole k is:
ΔQk＝sdkvdk (0.3)
assuming that the hole k is small, the suction force of the left and right cross-sections of the hole k is approximately equal, i.e.:
pk＝p′k-1 (0.4)
flow velocity v according to Bernoulli's equationdkCan be expressed as:
because hole k is assumed to be small, the cross-sectional area of hole k on the left side is approximately equal to the cross-sectional area on the right side, i.e.:
A′k-1＝Ak (0.6)
therefore, from equations (0.2) and (0.6) we can obtain:
Akvk＝Ak+1v′k (0.7)
and (3) analysis:
for constant pipe diameter and same bore diameter, i.e.
Ak＝Ak+1 (0.8)
sdk＝sdk+1 (0.9)
From equations (0.2) and (0.8), it can be seen that
vk＝v′k (0.10)
From equations (0.1) and (0.10), it can be seen that
pk＝p′k+ρghfk (0.11)
The flow rate of hole k is
The flow rate of hole k +1 is
By comparing the equations (0.12) and (0.13), it can be found that the flow velocity v of the hole k +1dk+1Flow velocity v greater than hole kdk. And because of the cross-sectional area s of the hole k +1dk+1And cross-sectional area s of hole kdkEqual, according to equation (0.3), flow Δ Q of hole k +1k+1Flow Δ Q greater than hole kk. The closer to the negative pressure suction port, the greater the suction force of the hole.
To keep the suction force for each hole the same, the following two schemes can be adopted.
Scheme 1: the pipe diameter is kept unchanged, and the hole diameter is changed.
With constant pipe diameter, i.e.
Ak＝Ak+1 (0.14)
From equations (0.2) and (0.14), it can be seen that
vk＝v′k (0.15)
From equations (0.1) and (0.15), it can be obtained
pk＝p′k+ρghfk (0.16)
The flow rates of the hole k and the hole k +1 are respectively
The suction forces of the holes k and k +1 are the same, i.e.
ΔQk＝ΔQk+1 (0.19)
Then it is required to satisfy
Namely, the hole close to the top of the inner pipe is smaller, and the hole far away from the top of the inner pipe is larger, and the scheme of the invention is implemented by adoptingscheme 1.
Scheme 2: the aperture is kept unchanged, and the pipe diameter is changed.
In the case of a constant pore diameter, i.e.
sdk＝sdk+1 (0.21)
To keep the suction force of each hole the same, i.e.
ΔQk＝ΔQk+1 (0.22)
From equations (0.3) and (0.21), it can be found
vdk＝vdk+1 (0.23)
The flow rates for well k and well k +1 can be expressed as
Thus, it is possible to provide
pk＝p′k (0.26)
From equations (0.1) and (0.26), it can be found
Namely, it is
From equation (0.7), it can be found
The pipe diameter close to the top of the inner pipe is larger, and the pipe diameter far away from the top of the inner pipe is smaller.
Thedevice sponge 5 adopts the VSD sponge, the aperture of the VSD sponge is large, the attraction force of the near end and the far end of the VSD sponge is basically the same, the using effect of the VSD sponge cannot be influenced due to different positions, thesponge 5 is placed in theinner tube 1, due to the porous material of the VSD sponge, the VSD sponge not only has good water absorption, but also can play a role in filtration, blood cell masses and blood clots can be adsorbed in the sponge in the outward drainage process, do not enter the tube, cannot cause the blockage of the tube, and also avoids the formation of foreign matters, the filtration and blocking effects of the sponge can also block and retain red blood cells, fibrin and the like in the wound, and further organize the formation of scar tissues, thereby promoting the healing of the wound.
As shown in fig. 3, the bottom end of theinner tube 1 may be a straight tube vertically arranged inside the wound; still can be for the level setting in the inside return bend of wound, as shown in figure 1,outer tube 2 is double-deck sleeve structure, and the internal diameter ofouter tube 2 is less than the internal diameter ofinner tube 1 to can guarantee at the in-process of drainage ware work,sponge 5 is fixed ininner tube 1, can not run out.
As shown in fig. 4, theouter tube 2 can also be designed to have a structure with the same inner diameter as theinner tube 1, abaffle 4 is horizontally arranged at the joint of theouter tube 2 and theinner tube 1, thebaffle 4 is of an annular structure, the outer edge of thebaffle 4 is of a circle structure integrated with theinner tube 1 and theouter tube 2, and thesponge 5 cannot pass through thebaffle 4 under the action of pressure.
The end of theouter pipe 2, which is far away from theinner pipe 1, is a hose, and a switch clamping device is arranged on the hose, so that the suck-back phenomenon generated when the hose is not used is avoided.
The working process of the invention is as follows: the drainage tube comprises a liquid inlet woundinner tube 1 and a liquid outlet woundouter tube 2, one end of theouter tube 2 is connected with a negative pressure suction port, a negative pressure suction device is started, body fluid such as pus, blood, liquid and the like which are leaked or accumulated on the surface of a wound surface of a human body tissue with a wound or sinus external part being damaged or removed is sucked into theinner tube 1 through aside hole 3, the body fluid is led out through theouter tube 2, the wound or sinus external part does not need to be sealed by a film in a general condition, and a sterile sealing film can be used for sealing a gap between the drainage tube and the wound surface in a special. The external drainage tube is finally connected with the negative pressure suction port of the ward equipment.
The invention improves the existing aspirator, sponge is plugged into the inner tube structure, the inner tube is provided with the side holes, the apertures of the side holes are arranged according to a certain rule, so that the pressure of the aperture of each side hole is kept consistent, thereby being beneficial to drainage, avoiding the problem that the drainage degree of each part in a wound is different due to different attraction in the drainage process and influencing the whole drainage efficiency, the arrangement of the side holes 3 can not cause the problems that the sponge falls off and is difficult to replace, and the tubular negative pressure drainage device has the advantages that the deeper sinus or wound surface of the wound can be safely used, the sponge can not fall off and other risks, and the negative pressure attraction in the wound is more uniform. The invention has simple structure, and when the sponge needs to be taken out, the sponge can be completely taken out in a very aspect, thereby avoiding the generation of dead space and accelerating the healing of the wound.
Claims (7)
1. The utility model provides a tubulose negative pressure drainage ware for orthopedics, its characterized in that, including inner tube (1) that is located wound inside and outer tube (2) that is located the wound outside, outer tube (2) are located the top of inner tube (1) and outer tube (2) are linked together, it has even side opening (3) of a plurality of distribution to open on the lateral wall of inner tube (1), follows the distance between the top of inner tube (1) to the adjacent side opening (3) in bottom is the same, and the aperture of side opening (3) is not of uniform size, VSD sponge (5) is filled to the inside of inner tube (1).
2. The tubular negative-pressure flow diverter for orthopedics according to claim 1, characterized in that the pore size distribution of the side holes (3) meets the following requirements:
in the formula: k holes are arranged from the top to the bottom of the inner tube, k is 1,2, …, the section of the tube from the hole k to the hole k +1 is the kth section of the tube, sdkIs the cross-sectional area of the hole k, ρ is the density of the pipe, g is the acceleration of gravity, hfFor on-way head loss, p0Is the suction at the outlet of the inner tube, pkIs the suction of the kth section of pipe, sdkThe cross-sectional area of the hole k.
3. The tubular negative pressure drainage device for orthopedics department according to claim 1, characterized in that the bottom of the inner tube (1) is a closed structure.
4. The tubular negative pressure flow diverter for orthopedics department according to claim 1, characterized in that the outer tube (2) is a double-layer sleeve structure, and the inner diameter of the outer tube (2) is smaller than that of the inner tube (1).
5. The tubular negative pressure drainage device for orthopedics department according to claim 1, characterized in that a negative pressure suction port is connected to one end of the outer tube (2) far away from the inner tube (1).
6. The tubular negative pressure flow diverter for orthopedics department according to claim 1, characterized in that the joint of outer tube (2) and inner tube (1) is horizontally provided with a baffle (4), the baffle (4) is of a ring structure, and the outer edge of the baffle (4) is of a circle structure integrated with the inner tube (1) and the outer tube (2) respectively.
7. The tubular negative pressure drainage device for orthopedics department according to claim 1, characterized in that the end of the outer tube (2) far away from the inner tube (1) is a hose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110363067.1ACN113082309B (en) | 2021-04-02 | 2021-04-02 | A tubulose negative pressure drainage ware for orthopedics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110363067.1ACN113082309B (en) | 2021-04-02 | 2021-04-02 | A tubulose negative pressure drainage ware for orthopedics |
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| Publication Number | Publication Date |
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| CN113082309Atrue CN113082309A (en) | 2021-07-09 |
| CN113082309B CN113082309B (en) | 2025-08-01 |
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| CN202110363067.1AActiveCN113082309B (en) | 2021-04-02 | 2021-04-02 | A tubulose negative pressure drainage ware for orthopedics |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119327011A (en)* | 2023-07-21 | 2025-01-21 | 江苏暖阳医疗器械有限公司 | Drug delivery device |
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| JP2010005282A (en)* | 2008-06-30 | 2010-01-14 | Sumitomo Bakelite Co Ltd | Medical drain tube |
| CN203235129U (en)* | 2013-05-21 | 2013-10-16 | 中国人民解放军第三军医大学第二附属医院 | Negative pressure suction bar for deep drainage |
| CN215134250U (en)* | 2021-04-02 | 2021-12-14 | 西安市中心医院 | Orthopedics negative pressure drainage ware |
- 2021
- 2021-04-02CNCN202110363067.1Apatent/CN113082309B/enactiveActive
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1373679A (en)* | 1999-07-19 | 2002-10-09 | I-弗琉公司 | Catheters that deliver drugs evenly |
| US20030009132A1 (en)* | 2001-04-13 | 2003-01-09 | Tricardia Llc | Syringe system |
| US20030216710A1 (en)* | 2002-03-26 | 2003-11-20 | Hurt Robert F. | Catheter |
| WO2005095875A1 (en)* | 2004-03-30 | 2005-10-13 | Mitsubishi Denki Kabushiki Kaisha | Flow path device, freezing cycle device, pressure pulsation reducing device, and pressure pulsation reducing method |
| US20060074388A1 (en)* | 2004-09-30 | 2006-04-06 | Alan Dextradeur | Fluid management flow implants of improved occlusion resistance |
| US20070255230A1 (en)* | 2006-04-27 | 2007-11-01 | Sdgi Holdings, Inc. | Vented directional delivery cannula with openings of different size for use with flowable materials and method for use thereof |
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| JP2010005282A (en)* | 2008-06-30 | 2010-01-14 | Sumitomo Bakelite Co Ltd | Medical drain tube |
| CN203235129U (en)* | 2013-05-21 | 2013-10-16 | 中国人民解放军第三军医大学第二附属医院 | Negative pressure suction bar for deep drainage |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN119327011A (en)* | 2023-07-21 | 2025-01-21 | 江苏暖阳医疗器械有限公司 | Drug delivery device |
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| CN113082309B (en) | 2025-08-01 |
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