CN201744062U - Sealing rubber ring for sealed connecting negative-pressure closed drainage device and orthopaedic needle and drainage system - Google Patents

Abstract

The utility model provides a sealing ring for sealed connecting a negative-pressure closed drainage device and an orthopaedic needle and a drainage system. The sealing rubber ring comprises elastic sealing casings communicated one another and a sealing base of which the lower part extending outwards, and the elastic sealing casing and the sealing base are in an integrated structure. The drainage system comprises a negative-pressure closed drainage device, and the sealing rubber ring for connecting and sealing an orthopaedic external fixing device puncturing needle and the negative-pressure closed drainage device; the sealing rubber ring comprises the elastic sealing casings communicated one another and the sealing base of which the lower part extending outwards. When in use, the lower part of the orthopaedic external fixing device puncturing needle is sleeved with the sealing rubber ring; after the orthopaedic needle positioning is completed, a sealing film of the negative-pressure closed drainage device and a porous foam soft pad are completely covered around the orthopaedic external fixing device puncturing needle to be assembled; the sealing rubber ring is moved downwards, the sealing rubber ring base closely clings to the sealing film of the negative-pressure closed drainage device, so as to completely cover the gap of the sealing film located at the needle and seal the gap.

Description

O-ring seal and drainage system that negative pressure closed drainage device and orthopaedics are threaded a needle and is tightly connected

Technical field

This utility model relates to the medical machinery field, O-ring seal and drainage system that specifically a kind of negative pressure closed drainage device and orthopaedics are threaded a needle and is tightly connected.

Background technology

Negative-pressure sealed drainage technology (vacuum sealing drainage is called for short VSD) is that German ULM Wim doctor Fleischman of university initiated in 1992, and forms theoretical blank, is used for the drain of extremity wound surface; Chinese professor Qiu Huade was applied to department of general surgery with the negative-pressure sealed drainage technology first in 1994, had started the beginning that the negative-pressure sealed drainage technology is used in department of general surgery.Wang Yanfeng, Qiu Huade professor in authorized patent CN 2276350 on March 18th, 1998, is first patent of negative-pressure sealed drainage technology in China.From then on, the negative-pressure sealed drainage technology has obtained bigger development in China.

The negative-pressure sealed drainage technology realizes by negative-pressure sealed drainage system, and it comprises that porous foam cushion, an end are arranged on drainage tube in the porous foam cushion, are used for the sealing film of sealing porous airfoam cushion.The porous foam cushion of assembling drainage tube is laid on the wound surface, seals, and drainage tube is connected negative pressure, thereby set up the drain district of a sealing at the wound surface place, carry out negative-pressure sealed drainage constantly with sealing film.Compare with existing common changing dressings, the negative-pressure sealed drainage technology can will be removed by porous foam cushion and drainage tube at the right time by exudate in the drain district and slough, can reach " nil product is poly-" state thereby make by the drain district, wound surface can be under the lasting cleaning ambient, greatly reduces the heavily absorption of body contratoxin; Even there is bigger lacuna to exist, lacuna also quickens to dwindle because of the existence of negative pressure.For shallow table wound surface, sealing film and porous foam cushion also make the more approaching physiological moisture state of local environment; Simultaneously, the negative pressure that acts on the wound surface soft tissue stimulates, and helps the improvement of local microenvironment and disappearing of tissue edema, has quickened the new life of granulation tissue in the wound surface, shortens wound healing time.Under negative-pressure sealed drainage technology treatment, need not to change dressings in wound surface 3-7 days, reduced medical worker's workload, reduced the patient suffering, reduced the general practice expense.

The negative-pressure sealed drainage technology is widely used in China: fields such as traumatology department, orthopaedics, department of general surgery, Department of B urn.

Yet, be subject to the standard flow process and the Therapeutic Principle of existing orthopaedics external fixation technical operation, still there is extremely inconvenience of sealing in the operation of existing negative-pressure sealed drainage technology wound surface under orthopaedics external fixation technology, and the poorly sealed close problem that causes the negative-pressure sealed drainage technical failure.And good sealing is the key that guarantees drainage effect, also is where the shoe pinches in the whole negative-pressure sealed drainage operation.Mostly be attended by fracture when often limbs have wound surface, and the Therapeutic Principle of open fracture must adopt external fixation.The standard flow process of the operation of existing orthopaedics external fixation technology is: at first fracture site position near-end and far-end are resetted, use the percutaneous of threading a needle that fracture site is carried out half puncture or full puncture; The puncture finish after with fixed connecting piece be installed in thread a needle on, connecting rod is installed in adjusts fixed angle on the fixed connecting piece then, be assembled into a complete bone external fixer with the fracture fixation; Use the airfoam cushion after the cutting to be coated with the skin and the soft tissue defects position of threading a needle and passing the place at last, and seal with the sealing film after the cutting.The Therapeutic Principle fixes the fracture affected part with bone external fixer earlier, carries out wound surface then and handles and seal operation; Do not fix not allow to carry out any other operation before intact in the fracture affected part, in order to avoid the bone that resets is disconnected once more at the affected part.Under this operating process and the Therapeutic Principle, to having the extremely careful and loaded down with trivial details operation of wound surface sealing needs under the bone external fixer, the porous foam cushion is very easily poorly sealed close with the junction of threading a needle, and is the place that leaks gas extremely easily.Encapsulating method commonly used comprises: (" negative-pressure sealed drainage technology " the 2nd edition P20-P24 such as puncture method, " mesentery " method, sewing and " making dumplings " method, Qiu Huade Song Jiuhong chief editor, the People's Health Publisher publishes), usually use sealing film to the subsides method for the sealing of bone external fixer, promptly use two sealing films to thread a needle pasting to seal.Sometimes even for reaching the effect of sealing, do not stint and expend a large amount of time and efforts, whole bone external fixer is wrapped up with sealing film.Above-mentioned encapsulating method is all very loaded down with trivial details in the operation of reality, and operation and exercise that operative doctor all needs to carry out repeatedly could be grasped, and the operating time is long, and patient is very painful.Simultaneously, owing to need long-time operation, patient understands a large amount of inhalation anesthetics, brings very serious adverse to patient, even can too much cause patient's brain death because anesthetics sucks.And said method sealing is still insecure, only depend on pad pasting extremely difficulty finish sealing, leak rate reaches more than 90%, very easily causes because of gas leakage causes the therapeutic effect of negative-pressure sealed drainage system to weaken even failure.Even seal completely, threading a needle still can make the pad pasting viscosity diminishes is caused seal failure because of the accumulation of the tissue fluid of constantly oozing out to subsides place.And after weakening of the therapeutic effect of negative-pressure sealed drainage system even the failure, infecting very easily appears in the place of threading a needle, and can extend in the bone cavity along threading a needle always; Behind the infection suppurates, because blood supplies not enough and is positioned at bone, pus is extremely difficult discharges, and causes traumatic bone marrow inflammation in the bone cavity, and patient tends to pain unbearably, and is very painful.And the scorching treatment of traumatic bone marrow cost is very high, and treatment is difficulty very also, even prolonged protracted course of disease, and the repetitious stimulation wound surface also may cause the generation of squamous cell cancer in therapeutic process.

Therefore, existing negative-pressure sealed drainage technology sealing after installing bone external fixer additional is improved, the tightness of raising sealing has significance to the development of whole negative-pressure sealed drainage technology.

Summary of the invention

The purpose of this utility model is to overcome the sealing of above-mentioned existing negative pressure closed drainage device after installing bone external fixer additional and fixing unreasonable, and the O-ring seal that provides a kind of negative pressure closed drainage device and orthopaedics to thread a needle to be tightly connected and this system structure of drainage system is simple, easy to use, the sealing tight, this method simple operation, sealing effectiveness excellence.

For achieving the above object, the technical solution of the utility model:

O-ring seal of the present utility model comprises the elastic packing sleeve pipe that is interconnected and the outward extending sealed base of its underpart, and described elastic packing sleeve pipe and sealed base are structure as a whole; The pipe thickness a of described elastic packing sleeve pipe is 0.5mm～1.5mm, and the thickness b of described sealed base is 0.5mm～1.5mm.

Further, the sealed base of described O-ring seal bottom toughness layer.

Further, the height of the elastic packing sleeve pipe of described O-ring seal is 15～25mm; The monolateral minimum widith of sealed base is 10mm.

Preferably, described elastic packing sleeve pipe top inner diameter d₂The diameter d of threading a needle than bone external fixer₁Little 0.3mm～1.5mm; The inner diameter d of described elastic packing sleeve pipe bottom₃Than (1a) diameter d of threading a needle₁Big 0.8～2mm.

The negative-pressure sealed drainage system of band O-ring seal of the present utility model comprises negative pressure closed drainage device, described negative pressure closed drainage device comprises the porous foam cushion, one end is arranged on the drainage tube in the porous foam cushion and is used for the sealing film of sealing porous airfoam cushion, described negative-pressure sealed drainage system also comprises the O-ring seal with negative pressure closed drainage device of threading a needle that is used to connect the sealing bone external fixer, described O-ring seal comprises the elastic packing sleeve pipe that is interconnected and the outward extending sealed base of its underpart, and described elastic packing sleeve pipe and sealed base are structure as a whole.

Further, toughness layer bottom the described sealed base.

Further, described elastic packing casing inner diameter d₂The diameter d of threading a needle than bone external fixer₁Little 0.3mm～1.5mm.

Preferably, described elastic seal cartridge tube wall thickness a is 0.5～1.5mm, described sealed base) thickness b is 0.5～1.5mm.

Preferably, described elastic packing sleeve pipe top inner diameter d₂The diameter d of threading a needle than bone external fixer₁Little 0.3mm～1.5mm; The inner diameter d of described spring-backed quill bottom₃Than the diameter d of threading a needle₁Big 0.8～2mm.

Further, described negative pressure closed drainage device with thread a needle around the junction, the pad pasting that covers the bonding crack between O-ring seal and the sealing film is fully arranged.

1., changed the rule of operation and the principle of traditional orthopaedics external fixation technology the utlity model has following advantage:, to seal with fixing operation and combine, sealing for bone external fixer is very tight, stop to reduce, more stopped the infection of threading a needle and locating because of gas leakage causes the failure of negative-pressure sealed drainage treatment or effect; 2., simple to operate, need not to adopt pad pasting to seal bone external fixer; 3., the thread a needle use amount of thin film of sealing almost do not have, and reduced the sealing cost, reduced patient's financial burden; 4., the scope of application is extensive, is not subjected to the restriction of bone external fixer installation position and the restriction of model specification; 5., shortened the time of operation technique, and alleviated patient's misery; 6., because the shortening of operation time, reduce the intake of patient's anaesthetic.

This utility model utilizes O-ring seal to finish sealing to bone external fixer and negative pressure closed drainage device, not only simple in structure, the operation more convenient, and sealing effectiveness has had very big raising than traditional mode that covers pad pasting repeatedly, can accomplish to stop fully gas leakage, leak rate can be controlled in below 1%, can accomplish positive confinement behind the use pad pasting.Meanwhile, use O-ring seal to substitute traditional mode that covers pad pasting repeatedly, cost also significantly reduces.

This utility model has been overturned traditional orthopaedics external fixation technical operation standard, to before fracture affected part fixing O-ring seal is installed just finishing, carry out seal operation, efficiently solve the sealing problem between bone external fixer and negative pressure closed drainage device, seal very tightly, stop to reduce because of gas leakage causes the failure of negative-pressure sealed drainage treatment or effect.

This utility model has solved the key technology that negative pressure closed drainage device is applied to orthopedic injury, substantially stopped the infection that orthopedic injury is threaded a needle and located, recurrent infection is stopped fully along the situation about extending in the bone cavity of threading a needle always, greatly reduced patient the treatment risk, alleviated patient's misery, ensure therapeutic effect very effectively, greatly reduced patient's disability rate.

Description of drawings

Fig. 1 is the negative-pressure sealed drainage system user mode sketch map of band O-ring seal of the present utility model;

Fig. 2 is the structural representation of the negative-pressure sealed drainage system of band O-ring seal of the present utility model;

Fig. 3 is the structure cutaway view of O-ring seal.

The specific embodiment

Describe performance of the present utility model in detail below in conjunction with accompanying drawing, but they do not constitute to qualification of the present utility model, only do for example.By explanation, advantage of the present utility model will become clear more and understand easily simultaneously.

As shown in Figure 1 and Figure 2, the negative-pressure sealed drainage system of this utility model band O-ring seal, comprise negative pressure closeddrainage device 2, described negative pressure closed drainage device comprises thatporous foam cushion 2b, an end are arranged on thedrainage tube 2c in theporous foam cushion 2b and are used for the sealing film 2a of sealingporous airfoam cushion 2b, and described negative-pressure sealed drainage system also comprises and is used to connect the thread a needle O-ring seal 3 of 1a and negative pressure closeddrainage device 2 of sealing bone external fixer 1.1c is the connecting device of boneexternal fixer 1, and 1b is the connecting rod of boneexternal fixer 1.

Fig. 3 is the structure cutaway view of O-ring seal: described O-ring seal 3 comprises the elasticpacking sleeve pipe 3a that is interconnected and the outward extending sealedbase 3b of its underpart, and described elasticpacking sleeve pipe 3a and sealedbase 3b are structure as a whole.

Further, described sealedbase 3b bottom toughness layer is convenient to the sealing of O-ring seal and negative pressure closed drainage device, can avoid gas leakage fully, and is simultaneously, more laborsaving, convenient in order to operate.

Further, described elasticpacking sleeve pipe 3a inner diameter d₂Diameter d than the 1a that threads a needle of bone external fixer₁Little 0.3mm～1.5mm helps elasticpacking sleeve pipe 3a and the sealing of the 1a that threads a needle, realizes positive confinement.

Preferably, described elasticpacking sleeve pipe 3a is made by latex material, and pipe thickness a is 0.5～1.5mm, and described sealedbase 3b thickness b is 0.5～1.5mm.The thickness of O-ring seal is relevant with its size.The 1a that threads a needle of bone external fixer comprises that the various models that are applicable to different parts thread a needle, and as Shan Shi pin, Kirschner wire, steinman pin etc., is applicable to that simultaneously adult and child's genuine model is also had any different.When the diameter of the 1a that threads a needle during at 0.5～3mm, the thickness of O-ring seal 3 is 0.5～0.8 more suitable; When the diameter of the 1a that threads a needle during at 2.5～4mm, the thickness of O-ring seal 3 is 0.8～1.2 more suitable; When the diameter of the 1a that threads a needle during at 3.5～6mm, the thickness of O-ring seal 3 is 1.0～1.5 more suitable.

Preferably, the inner diameter d bottom the described spring-backedquill 3a₃Than the 1a diameter d of threading a needle₁Big 0.8～2mm when easy to use, is easy to downward modulation.

Preferably, the height H of elasticpacking sleeve pipe 3a is 15～25mm; The monolateral minimum widith L of sealedbase 3b is 10mm.The shape of sealedbase 3b is not limit, and can be rectangle.When sealing film 2a is microscler when seam of cutting, sealedbase 3b is a rectangle, and its length and sealing film 2a are isometric, can be with the covering of whole piece seam.

Further, the pad pasting 4 that covers the bonding crack between O-ring seal 3 and the sealing film 2a is fully arranged, guarantee sealingeffectiveness.Pad pasting 4 is laid on the bonding crack that covers fully between sealedbase 1b and the sealing film 6, can accomplish positive confinement.Describedpad pasting 4 can use same material with sealing film 2a.

Using method of the present utility model is described in detail in detail below:

Method one:

(1) at the bottom suit O-ring seal 3 of the threading a needle of bone external fixer 1 (as the Shan Shi nail) 1a;

(2) finish the thread a needle location of 1a of boneexternal fixer 1;

(3) according to threading a needle sealing film 2a and theporous foam cushion 2b clip of position with negative pressure closeddrainage device 2, then on wound surface, promptly thread a needle and layporous foam cushion 2b after the cutting on every side, make the 1a that threads a needle be arranged in the cutting slit, and with sealing film 2a fixing seal; Cover fully boneexternal fixer 1 thread a needle 1a around;

(4) downward modulation O-ring seal 3 makes O-ring seal base 3b fit tightly sealing film 2a, makes it cover fully that sealing film 2a is positioned at the breach at the 1a place of threading a needle and with its sealing; Reuse pad pasting 4 sticks O-ring seal base 3b with the mouth that combines of sealing film 2a.

Method two:

(1) at the bottom suit O-ring seal 3 of the threading a needle of bone external fixer 1 (as the Shan Shi nail) 1a;

(2) finish the thread a needle location of 1a of boneexternal fixer 1;

(3) according to the position of threading a needle with the sealing film 2a and theporous foam cushion 2b clip of negative pressure closeddrainage device 2, then on wound surface, promptly thread a needle and layporous foam cushion 2b after the cutting on every side, make the 1a that threads a needle be arranged in the cutting slit;

(4) downward modulation O-ring seal 3, make O-ring seal base 3b fit tightlyporous foam cushion 2b, sealing film 2a is covered onporous foam cushion 2b and the O-ring seal base 3b then, make the interface of O-ring seal base 3b andporous foam cushion 2b be capped sealing simultaneously; Reuse pad pasting 4 sticks O-ring seal base 3b with the mouth that combines of sealing film 2a.

Thereby finish being tightly connected between bone external fixer and negative pressure closed drainage device.

During the specialty of bone-knitting external fixer installation outside of this utility model method, use the operating process of negative-pressure sealed drainage technical finesse wound surface as follows: earlier fracture site position near-end and far-end to be resetted, use is threaded a needle the 1a percutaneous to capable half puncture of fracture site or full puncture, after puncture is finished, suit O-ring seal 3 on the 1a that threads a needle at skin tissue defects position is being arranged, carrying out seal operation; Then, again fixed connectingpiece 1c is installed on the 1a that threads a needle, then connectingrod 1b is installed in fixed connectingpiece 1c and goes up the adjustment fixed angle, finish the assembling of boneexternal fixer 1, fracture is fixed; Then, theporous foam cushion 2b after the use cutting is coated with the skin tissue defects position that the 1a that threads a needle passes the place, makes the 1a that threads a needle be arranged in the cutting slit, seals whole wound surface with the sealing film 2a after the cutting; At last, the sealedbase 3b of O-ring seal 3 is adjusted downward to sealing film 2a fits tightly, and make base cover the breach of sealing film 2a and the 1a junction of threading a needle fully, finish the sealing with the junction of the 1a that threads a needle porous foam cushion 2b.This shows, this utility model has been overturned traditional orthopaedics external fixation technical operation standard, to before fracture affected part fixing O-ring seal 3 is installed just finishing, carry out seal operation, efficiently solve the sealing problem between boneexternal fixer 1 and negative pressure closed drainage device, seal very tightly, stop to reduce because of gas leakage causes the failure of negative-pressure sealed drainage treatment or effect.

Be conventional seals mode and embodiment comparative test result of the present utility model below, adopt each 92 example of clinical case to experimentize, obtain experimental data and tabulation relatively, the gained tables of data sees Table one:

Table one conventional seals is in this utility model seal parameters synopsis

Average operating time

Average leak rate

The sealing film usable floor area

The anaesthetic respiratory time

The place's infection rate of threading a needle

The specification limits of threading a needle

Comparative example

＞30min

＞90％

＞400cm2

?＞30min

45％

Highly be higher than more than the wound surface 3cm

Embodiment

＜5min

＜1％

＜100cm2

?＜5min

1％

Unrestricted

Can draw to draw a conclusion by table one:

At first, this utility model leak rate can be controlled at below 1%, after 4 sealings of utilization pad pasting, almost can realize not having gas leakage, compare with the leak rate of conventional seals mode more than 90%, can almost stop the poorly sealed close and phenomenon of gas leakage, guarantee the effect of negative-pressure sealed drainage treatment very effectively.The effect that the negative-pressure sealed drainage treatment has been arranged is as assurance, the infection rate at 1a place of threading a needle is reduced to below 1% by original 45%, almost stopped the to thread a needle infection at 1a place, stop fully and infect situation about extending in the bone cavity always along the 1a that threads a needle, greatly reduced patient the treatment risk, alleviated patient's misery, ensure therapeutic effect very effectively, greatly reduced patient's disability rate.

Secondly, this utility model need not to adopt sealing film to seal and threads a needle, and the use amount of sealing film has reduced more than four times (by traditional 400cm²More than reduce to 100cm²Below), can greatly reduce the sealing cost, reduce patient's financial burden.

This utility model scope of application is extensive, is not subjected to the restriction of type, specification and the installation position of bone external fixer.

At last, this utility model can greatly shorten operation time, operating time is by being reduced to more than original half an hour below five minutes, can greatly alleviate patient's the misery and the respiratory time of anaesthetic, effectively improve therapeutic effect, and effectively alleviate the side effect that anesthetics brings to patient, reduce patient's operation risk, anesthetics sucks excessive and situations such as patient's brain death that cause when having stopped the operation of orthopaedics external fixation fully.

Comprehensive above-mentioned conclusion, this utility model have solved and played revolutionary ground impetus when orthopaedics external fixation technology and negative-pressure sealed drainage technology are used simultaneously.

In sum: core of the present utility model is to utilize threading a needle and negative pressure closed drainage device of O-ring seal connection and sealing bone external fixer; therefore; on the basis of this utility model principle; realize any change or distortion that bone external fixer is threaded a needle and is connected and seals with negative pressure closed drainage device, all belong to protection domain of the present utility model.

Claims (12)

1. negative pressure closed drainage device and the orthopaedics O-ring seal of threading a needle and being tightly connected, comprise Sealed casing pipe, it is characterized in that: described O-ring seal (3) comprises the elastic packing sleeve pipe (3a) that is interconnected and the outward extending sealed base (3b) of its underpart, and described elastic packing sleeve pipe (3a) is structure as a whole with sealed base (3b); The pipe thickness a of described elastic packing sleeve pipe (3a) is 0.5mm～1.5mm, and the thickness b of described sealed base (3b) is 0.5mm～1.5mm.

2. O-ring seal according to claim 1 is characterized in that: described sealed base (3b) bottom toughness layer.

3. O-ring seal according to claim 1 and 2 is characterized in that: the height of elastic packing sleeve pipe (3a) is 15～25mm; The monolateral minimum widith of sealed base (3b) is 10mm.

4. O-ring seal according to claim 1 and 2 is characterized in that: described elastic packing sleeve pipe (3a) top inner diameter d₂Diameter d than thread a needle (1a) of bone external fixer₁Little 0.3mm～1.5mm; The inner diameter d of described elastic packing sleeve pipe (3a) bottom₃Than (1a) diameter d of threading a needle₁Big 0.8～2mm.

5. O-ring seal according to claim 3 is characterized in that: described elastic packing sleeve pipe (3a) top inner diameter d₂Diameter d than thread a needle (1a) of bone external fixer₁Little 0.3mm～1.5mm; The inner diameter d of described elastic packing sleeve pipe (3a) bottom₃Than (1a) diameter d of threading a needle₁Big 0.8～2mm.

6. negative-pressure sealed drainage system with O-ring seal, comprise negative pressure closed drainage device (2), described negative pressure closed drainage device comprises porous foam cushion (2b), one end is arranged on the drainage tube (2c) in the porous foam cushion (2b) and is used for the sealing film (2a) of sealing porous airfoam cushion (2b), it is characterized in that: described negative-pressure sealed drainage system also comprises and is used for connecting the thread a needle O-ring seal (3) of (1a) and negative pressure closed drainage device (2) of sealing bone external fixer (1), described O-ring seal (3) comprises the elastic packing sleeve pipe (3a) that is interconnected and the outward extending sealed base (3b) of its underpart, and described elastic packing sleeve pipe (3a) is structure as a whole with sealed base (3b).

7. the negative-pressure sealed drainage system of band O-ring seal according to claim 6 is characterized in that: described sealed base (3b) bottom toughness layer.

8. according to the negative-pressure sealed drainage system of claim 6 or 7 described band O-ring seals, it is characterized in that: described elastic packing sleeve pipe (3a) inner diameter d₂Diameter d than thread a needle (1a) of bone external fixer₁Little 0.3mm～1.5mm.

9. according to the negative-pressure sealed drainage system of claim 6 or 7 described band O-ring seals, it is characterized in that: described elastic packing sleeve pipe (3a) pipe thickness a is 0.5～1.5mm, and described sealed base (3b) thickness b is 0.5～1.5mm.

10. according to the negative-pressure sealed drainage system of claim 6 or 7 described band O-ring seals, it is characterized in that: described elastic packing sleeve pipe (3a) top inner diameter d₂Diameter d than thread a needle (1a) of bone external fixer₁Little 0.3mm～1.5mm; The inner diameter d of described spring-backed quill (3a) bottom₃Than (1a) diameter d of threading a needle₁Big 0.8～2mm.

11. negative-pressure sealed drainage system according to claim 6 or 7 described band O-ring seals, it is characterized in that: described negative pressure closed drainage device (2) with thread a needle (1a) on every side the junction, the pad pasting (4) that covers the bonding crack between O-ring seal (3) and the sealing film (2a) is fully arranged.

12. the negative-pressure sealed drainage system of band O-ring seal according to claim 8 is characterized in that: described elastic packing sleeve pipe (3a) top inner diameter d₂Diameter d than thread a needle (1a) of bone external fixer₁Little 0.3mm～1.5mm; The inner diameter d of described spring-backed quill (3a) bottom₃Than (1a) diameter d of threading a needle₁Big 0.8～2mm.

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