阅读说明：本技术 一种骨髓炎治疗方法及其冲洗引流装置 (Osteomyelitis treatment method and flushing drainage device thereof ) 是由 张�杰 邵明 卫萍 肖轶 任飞 谷风康 王静成 于 2021-07-14 设计创作，主要内容包括：本发明实施例公开了一种骨髓炎治疗方法及其冲洗引流装置,包括引流内筒和套在引流内筒外的冲洗外筒,引流内筒与冲洗外筒之间形成有密闭的冲洗腔,冲洗外筒的筒壁上设有与冲洗腔连通的冲洗口以及进液口,引流内筒的前端延伸至冲洗外筒外且设有回流口；其中,进液口用于向冲洗腔中通入冲洗液,引流内筒的尾端用于与负压设备连接,从冲洗口喷出的冲洗液在负压设备提供的负压作用下依次经回流口以及引流内筒,从引流内筒的尾端排出。该冲洗引流装置巧妙的将冲洗和引流结构结合为一体,避免了传统冲洗引流分开作用所带来的术区创伤大,引流不畅等弊端,为临床骨髓炎术中术后冲洗治疗提供新的治疗手段。(The embodiment of the invention discloses a osteomyelitis treatment method and a flushing drainage device thereof, and the method comprises a drainage inner cylinder and a flushing outer cylinder sleeved outside the drainage inner cylinder, wherein a closed flushing cavity is formed between the drainage inner cylinder and the flushing outer cylinder; wherein, the inlet is arranged in letting in the flush fluid to washing the chamber, and the tail end of drainage inner tube is used for being connected with negative pressure equipment, from washing mouthful spun flush fluid under the negative pressure effect that negative pressure equipment provided through backward flow mouth and drainage inner tube in proper order, from the tail end discharge of drainage inner tube. This wash drainage device ingenious will wash and the drainage structure combines as an organic whole, has avoided the tradition to wash that the drainage part effect brings art district's wound big, drawback such as drainage is not smooth, washes the treatment and provides new treatment means for postoperative in the clinical osteomyelitis art.)

1. The utility model provides a drainage device is washed to osteomyelitis which characterized in that: the washing device comprises a drainage inner cylinder (1) and a washing outer cylinder (2) sleeved outside the drainage inner cylinder (1), wherein a closed washing cavity (3) is formed between the drainage inner cylinder (1) and the washing outer cylinder (2), a washing port (4) and a liquid inlet (5) which are communicated with the washing cavity (3) are arranged on the wall of the washing outer cylinder (2), and the front end of the drainage inner cylinder (1) extends to the outside of the washing outer cylinder (2) and is provided with a backflow port (6);

wherein, inlet (5) be used for to wash let in the flush fluid in chamber (3), the tail end of drainage inner tube (1) is used for being connected with negative pressure equipment, follows wash mouthful (4) spun flush fluid and be in under the negative pressure effect that negative pressure equipment provided in proper order through backward flow mouth (6) and drainage inner tube (1), follow the tail end of drainage inner tube (1) is discharged.

2. The osteomyelitis irrigation drainage device of claim 1, wherein: a plurality of baffle rings (7) are fixedly arranged on the outer cylinder wall at the front end of the inner drainage cylinder (1), and the backflow port (6) is arranged between every two adjacent baffle rings (7).

3. The osteomyelitis irrigation drainage device of claim 2, wherein: the flushing ports (4) are arranged in rows along the circumferential direction of the flushing outer barrel (2), and each row comprises a plurality of flushing ports (4) which are arranged along the axial direction of the flushing outer barrel (2) at intervals.

4. The osteomyelitis irrigation drainage device of claim 3, wherein: one row of the spraying directions of any two adjacent rows of the flushing ports (4) are inclined downwards, and the other row of the flushing ports are inclined upwards.

5. The osteomyelitis irrigation drainage device of claim 4, wherein: the backflow port (6) is arranged in a row along the axial direction of the drainage inner barrel (1), and each row comprises a plurality of backflow ports (6) which are uniformly distributed in the circumferential direction of the drainage inner barrel (1).

6. The osteomyelitis irrigation drainage device of claim 5, wherein: the front end face of the drainage inner cylinder (1) is also provided with the backflow port (6), and the liquid inlet (5) is provided with a liquid inlet control valve (15) and a pressure gauge (16).

7. The osteomyelitis irrigation drainage device of any one of claims 1 to 6, wherein: still fixedly on the urceolus wall of drainage inner tube (1) set up fixation nut (8), drainage inner tube (1) inserts wash urceolus (2) back, fixation nut (8) connect soon to be fixed wash on the tail end of urceolus (2), be located the tail end keep off ring (7) will wash the front end of urceolus (2) and seal, thereby drainage inner tube (1), wash urceolus (2) fixation nut (8) and keep off and enclose between ring (7) wash chamber (3).

8. The osteomyelitis irrigation drainage device of claim 7, wherein: still include drilling rod (9), the pine of unscrewing fixation nut (8), will drainage inner tube (1) is followed the tail end of washing urceolus (2) withdraws from the back, drilling rod (9) can be followed the tail end of washing urceolus (2) is inserted and can be followed the front end of washing urceolus (2) is worn out in order to treat the bone surface of windowing and is carried out drilling treatment.

9. The osteomyelitis irrigation drainage device of claim 8, wherein: a guide cylinder (10) for guiding the insertion of the drill rod (9) is further arranged between the washing outer cylinder (2) and the drill rod (9), the guide cylinder (10) can be withdrawn from the tail end of the washing outer cylinder (2), the front end of the guide cylinder (10) is flush with the front end of the washing outer cylinder (2), the tail end of the guide cylinder extends out of the washing outer cylinder (2) and is in threaded connection with a threaded sleeve (11), and a limiting block (12) is fixedly arranged on the drill rod (9) behind the threaded sleeve (11);

the threaded sleeve (11) is provided with a first position and a second position on the guide cylinder (10), and when the threaded sleeve (11) is located at the first position and abutted against the limiting block (12), the front end of the drill rod (9) is flush with the front end of the washing outer cylinder (2); when the threaded sleeve (11) is located at the second position and is abutted to the limiting block (12), the drill rod (9) penetrates through the washing outer cylinder (2) and extends out for a set distance.

10. A method for treating osteomyelitis by using the irrigation drainage device of claim 9, wherein: firstly, incising the skin of a focus bone part, separating subcutaneous fascia in a temporary way, and inserting the washing outer cylinder (2) through a muscle gap until the front end of the washing outer cylinder (2) is abutted against the bone surface to be operated; then the guide cylinder (10) is inserted into the washing outer cylinder (2), and the front end of the guide cylinder (10) is abutted against the bone surface to be operated; inserting the drill rod (9) into the guide cylinder (10), enabling the front end of the drill rod (9) to be abutted against a bone surface to be operated, and enabling the rear end of the threaded sleeve (11) to be abutted against the front end of the limiting block (12);

then, according to the requirement of the driving depth of a drill bit at the front end of the drill rod (9) in the operation, screwing the threaded sleeve (11) to enable the threaded sleeve (11) to move forwards for a set distance along the flushing outer cylinder (2); then, starting the drilling machine, starting drilling, and finishing drilling when the block to be positioned abuts against the threaded sleeve (11) again;

then the drill rod (9) and the guide cylinder (10) are pulled out, the drainage inner cylinder (1) is inserted into the flushing outer cylinder (2), and the two ends of the flushing outer cylinder (2) are sealed, so that a flushing cavity (3) is formed between the drainage inner cylinder (1) and the flushing outer cylinder, after the surgical focus is cleared, the connected flushing reflux device penetrates into a focus area through normal skin and is placed in an inner cavity of an infected bone or between the infected bone and soft tissue, and then the soft tissue and the skin of the surgical area are sutured layer by layer;

at the moment, sterile flushing fluid flows into the flushing cavity (3) from the fluid inlet (5) and is sprayed out from the flushing port (4) to flush pyogenic substances in an infected bone inner cavity, after the pyogenic substances in the infected bone inner cavity are flushed completely, a flushing reflux device can be placed in a closed cavity formed by bones and surrounding soft tissues to carry out postoperative continuous flushing, and the flushed flushing fluid is adsorbed into the drainage inner cylinder (1) by the reflux port (6) under the action of negative pressure and is discharged out of a human body from the tail end of the drainage inner cylinder (1).

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a osteomyelitis treatment method and a flushing drainage device thereof.

Background

At present, the clinical treatment process of osteomyelitis generally comprises three processes of windowing and pressure reduction of pathological bone segments, focus clearing, catheter irrigation and drainage in an operation and the like; the traditional windowing method for windowing and pressure reduction comprises the following steps: drilling two rows of bone holes on the pathological change section by using a bone drill according to a preset scheme, then using a bone knife to chisel bone between the adjacent bone holes, and taking out bone bodies between the two rows of bone holes to form a bone window; the focus can be directly debrided through the bone window, and the common debridement treatment mode is to scrape the focus; and then the flushing and drainage device is flushed between the infected bone and the soft tissue, the flushing is carried out continuously in vitro, and the flushed residual liquid is discharged to the outside of the body in a negative pressure drainage mode, so that the bone and the surrounding soft tissue of the infected part are flushed continuously, the bacterial residue of the infected part is removed, and the recurrence probability of the focus is reduced to the maximum extent or the recurrence period is prolonged.

But the drainage device that washes that uses at present uses biological semi-permeable film to carry out the surface of a wound when sealed, causes easily disappointing in the drainage tube position, and troublesome poeration and gas tightness are prolonged along with postoperative drainage time, and the suction negative pressure often is difficult to guarantee because of the adventitia is damaged, and the later stage is drawn forth because of operation district soft tissue mucosa growth and necrotic thing and is blockked up the drainage tube simultaneously, and it is unsatisfactory often to make the drainage effect of washing, has also increased medical personnel's work load simultaneously. In addition, the existing single-tube flushing mode or negative pressure suction mode has the advantages that the flushing position of the flushing tube is fixed, a single point is formed, the flushing surface is insufficient, the purpose of continuous flushing is achieved mainly through filling, soaking and drainage of flushing liquid, the flushing position is fixed, flushing and drainage are separated, insufficient drainage flushing is often the main reason for short-term re-operation after the operation of a patient, and infection relapse occurs.

In addition, the existing bone windowing technology is mainly a common bone drill clinically, the depth and the position of a drilled hole basically depend on the experience of an operator, when the drilled hole depth is shallow, windowing is difficult, when the drilled hole is too deep, a drill bit easily reaches the normal bone on the opposite side, and infected pus is planted in the normal bone.

Disclosure of Invention

The invention mainly aims to provide a osteomyelitis treatment method and a flushing drainage device thereof, wherein the flushing drainage device skillfully combines a flushing structure and a drainage structure into a whole, avoids the defects of large wound of an operation area, unsmooth drainage and the like caused by the separation effect of the traditional flushing drainage, and provides a new treatment means for postoperative flushing treatment in clinical osteomyelitis operation.

Therefore, on one hand, the osteomyelitis irrigation drainage device provided by the embodiment of the invention comprises a drainage inner cylinder and an irrigation outer cylinder sleeved outside the drainage inner cylinder, wherein a closed irrigation cavity is formed between the drainage inner cylinder and the irrigation outer cylinder, an irrigation port and a liquid inlet which are communicated with the irrigation cavity are arranged on the cylinder wall of the irrigation outer cylinder, and the front end of the drainage inner cylinder extends to the outside of the irrigation outer cylinder and is provided with a backflow port; wherein the content of the first and second substances,

the inlet is used for to wash and let in the flush fluid in the chamber, the tail end of drainage inner tube is used for being connected with negative pressure equipment, follows wash mouthful spun flush fluid and be in negative pressure effect that negative pressure equipment provided is in proper order down through backward flow mouth and drainage inner tube, follow the tail end of drainage inner tube is discharged.

Specifically, a plurality of baffle rings are fixedly arranged on the front end outer cylinder wall of the drainage inner cylinder, and the backflow port is arranged between every two adjacent baffle rings.

Specifically, the flushing ports are arranged in rows along the circumferential direction of the flushing outer cylinder, and each row comprises a plurality of flushing ports which are arranged along the axial direction of the flushing outer cylinder at intervals.

Specifically, one of the two adjacent rows of the flushing ports has a downward inclined spraying direction, and the other row has an upward inclined spraying direction.

Specifically, the backward flow mouth is followed the axial of drainage inner tube is arranged in rows, and every row includes along a plurality of that the circumference equipartition of drainage inner tube was arranged the backward flow mouth.

Specifically, the front end face of the drainage inner cylinder is also provided with the backflow port, and the liquid inlet is provided with a liquid inlet control valve and a pressure gauge.

The drainage outer barrel is characterized by further comprising a drill rod, the fixing nut is unscrewed, the drainage inner barrel is withdrawn from the tail end of the flushing outer barrel, and the drill rod is inserted from the tail end of the flushing outer barrel and can penetrate out from the front end of the flushing outer barrel to perform drilling treatment on the bone surface to be windowed.

Specifically, a guide cylinder for guiding the insertion of the drill rod is further arranged between the flushing outer cylinder and the drill rod, the guide cylinder can withdraw from the tail end of the flushing outer cylinder, the front end of the guide cylinder is flush with the front end of the flushing outer cylinder, the tail end of the guide cylinder extends out of the flushing outer cylinder and is in threaded connection with a threaded sleeve, and a limiting block is fixedly arranged on the drill rod behind the threaded sleeve;

the threaded sleeve is provided with a first position and a second position on the guide cylinder, and when the threaded sleeve is located at the first position and is abutted against the limiting block, the front end of the drill rod is flush with the front end of the flushing outer cylinder; when the threaded sleeve is located at the second position and abutted to the limiting block, the drill rod penetrates through the washing outer cylinder and extends out of the washing outer cylinder for a set distance.

Specifically, a fixing nut is further fixedly arranged on the outer cylinder wall of the drainage inner cylinder, after the drainage inner cylinder is inserted into the washing outer cylinder, the fixing nut is screwed and fixed on the tail end of the washing outer cylinder, and the baffle ring at the tail end seals the front end of the washing outer cylinder, so that the washing cavity is defined among the drainage inner cylinder, the washing outer cylinder fixing nut and the baffle ring.

The other aspect of the embodiment of the invention provides a method for treating osteomyelitis, which comprises the steps of firstly incising the skin of a focus bone part, performing intermittent separation of subcutaneous fascia, and inserting the washing outer cylinder through a muscle gap until the front end of the washing outer cylinder is abutted against a bone surface to be operated; then inserting the guide cylinder into the washing outer cylinder, and enabling the front end of the guide cylinder to be abutted against the bone surface to be operated; inserting the drill rod into the guide cylinder, and enabling the front end of the drill rod to be abutted against the bone surface to be operated, wherein at the moment, the rear end of the threaded sleeve is abutted against the front end of the limiting block;

then, according to the requirement of the driving depth of a drill bit at the front end of the drill rod in the operation, screwing the threaded sleeve to enable the threaded sleeve to move forwards for a set distance along the flushing outer cylinder; then, starting the drilling machine, starting drilling, and finishing drilling when the block to be positioned is abutted against the threaded sleeve again;

then the drill rod and the guide cylinder are pulled out, the drainage inner cylinder is inserted into the washing outer cylinder, and the two ends of the washing outer cylinder are sealed, so that a washing cavity is formed between the drainage inner cylinder and the washing outer cylinder, after the surgical focus is cleared, the connected washing reflux device penetrates into a focus area through normal skin and is placed in an inner cavity of an infected bone or between the infected bone and soft tissue, and then the soft tissue and the skin of a surgical area are sutured layer by layer;

at the moment, sterile flushing fluid flows into the flushing cavity from the fluid inlet and is sprayed out from the flushing port to flush purulent substances in an infected bone inner cavity, after the purulent substances in the infected bone inner cavity are flushed completely, a flushing reflux device can be placed in a closed cavity formed by bones and surrounding soft tissues to carry out postoperative continuous flushing, and the flushed fluid is adsorbed into the drainage inner cylinder by the reflux port under the action of negative pressure and is discharged out of a human body from the tail end of the drainage inner cylinder.

Compared with the prior art, at least one embodiment of the invention has the following beneficial effects:

1. this wash drainage device ingenious will wash and the drainage structure combines as an organic whole, has avoided the tradition to wash that the drainage part effect brings art district's wound big, drawback such as drainage is not smooth, washes the treatment and provides new treatment means for postoperative in the clinical osteomyelitis art.

2. After the pus in the bone cavity is flushed completely, when a cavity formed by the bone and the surrounding soft tissues is inserted, the flushing drainage device can be inserted from a high position to a low position, and the drainage part can be always in the low position.

3. The design of the baffle ring at the front end of the drainage inner cylinder can support soft tissues around the backflow port at the front end of the drainage inner cylinder, so that the soft tissues or mucosa around the backflow port are difficult to be close to the backflow port, and the blockage probability of the backflow port is greatly reduced. In addition, if the drainage time is longer, when soft tissue grows into or the necrotic tissue is detained and causes the backward flow not smooth, can fix on the one hand and wash the urceolus, unscrew the fixation nut outside the drainage inner tube on the other hand, manual front and back push-and-pull drainage inner tube makes the space around the backward flow mouth increase once more, realizes normal drainage.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a perspective view of a flushing drainage device according to embodiment 1;

FIG. 2 is a schematic sectional view of the irrigation drainage system according to example 1;

FIG. 3 is a perspective view of the assembly of a drill rod and a guide cylinder according to embodiment 2;

fig. 4 is a sectional view of the assembly of the drill rod and the guide cylinder according to example 2.

Wherein, 1, an inner drainage cylinder; 2. washing the outer cylinder; 3. flushing the cavity; 4. flushing the opening; 5. a liquid inlet; 6. a return port; 7. a baffle ring; 8. fixing a nut; 9. a drill stem; 10. a guide cylinder; 11. a threaded sleeve; 12. a limiting block; 13. a locking sleeve; 14. locking the nut; 15. a liquid inlet control valve; 16. and a pressure gauge.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Example 1

Referring to fig. 1 and 2, the osteomyelitis irrigation drainage device comprises a drainage inner cylinder 1 and an irrigation outer cylinder 2 sleeved outside the drainage inner cylinder 1, wherein a relatively closed irrigation cavity 3 is formed between the drainage inner cylinder 1 and the irrigation outer cylinder 2, an irrigation port 4 and a liquid inlet 5 which are communicated with the irrigation cavity 3 are arranged on the cylinder wall of the irrigation outer cylinder 2, and the front end of the drainage inner cylinder 1 extends to the outside of the irrigation outer cylinder 2 and is provided with a backflow port 6; wherein, the liquid inlet 5 is used for introducing flushing liquid into the flushing cavity 3, and the tail end of the drainage inner cylinder 1 is used for being connected with negative pressure equipment (not shown in the figure) such as a negative pressure pump.

The working process of the flushing drainage device with the structure is as follows: after the focus of the operation is cleared, the flushing drainage device penetrates into the focus area through the normal skin, is placed in the inner cavity of the infected bone or between the infected bone and the soft tissue, and then the soft tissue and the skin of the operation area are sutured layer by layer, at the moment, the sterile flushing liquid is pumped into the flushing cavity 3 through the liquid inlet 5, a certain water pressure is formed in the flushing cavity 3 along with the continuous inflow of the sterile flushing liquid, then the washing liquid is sprayed out from the washing port 4 to wash the pyogenic substance in the infected bone cavity, and after the pyogenic substance in the infected bone cavity is washed clean, the device is placed in a closed cavity formed by bones and surrounding soft tissues, can be continuously washed after operation, and after washing is finished, a negative pressure device connected with the tail end of the drainage inner cylinder 1 is opened, so that the flushing liquid is drained to the liquid storage cylinder outside the human body through the backflow port 6 and the drainage inner cylinder 1 in sequence under the action of negative pressure, and backflow leading-out of the flushing liquid is realized.

The ingenious washing and drainage device that will wash that this embodiment provided combines as an organic whole with the drainage structure, has avoided the tradition to wash that the drainage part effect brought the art district wound big, drawback such as the drainage is not smooth, washes the treatment and provides new treatment means for postoperative in the clinical osteomyelitis art. In addition, the backflow port 6 is arranged at the front end of the drainage inner barrel 1 and is exposed out of the washing outer barrel 2, after pus in a bone cavity is washed clean and is inserted into a cavity formed by bones and surrounding soft tissues, the drainage part (the backflow port 6) is always at a low position, so that the washing and drainage device can still normally work even if the airtight negative pressure formed outside the washing and drainage device disappears after the soft tissues such as muscles are sutured, because the backflow port 6 at the inner side is always at a low position, the power of external suction can continuously act.

In some embodiments, a plurality of baffle rings 7 are fixedly arranged on the outer cylinder wall at the front end of the drainage inner cylinder 1, and a backflow port 6 is arranged between every two adjacent baffle rings 7. In this embodiment, the front end of the drainage inner cylinder 1 is provided with the baffle ring 7, which can support soft tissues around the backflow port 6 at the front end of the drainage inner cylinder 1, so that the soft tissues or mucous membranes around the backflow port 6 are difficult to be close to the backflow port 6, thereby greatly reducing the blockage probability of the backflow port 6 and solving the problem of operation failure caused by flushing and blockage of the backflow port 6 in the current clinical common drainage technology. The baffle ring 7 can be made of medical rubber, medical plastic or medical metal and the like.

In other embodiments, the flushing ports 4 are arranged in rows along the circumference of the flushing outer cylinder 2, each row comprising a plurality of flushing ports 4 arranged at intervals along the axial direction of the flushing outer cylinder 2. The design can effectively improve the flushing effect on the soft tissues and the infected bones of the infected parts.

It can be understood that, when the jet direction design of two adjacent rows of washing mouths 4 is opposite, also the adjacent two vertical rows of washing mouths 4 present the crossing layout, one row of jet direction is upwards to one side, another row of jet direction is downwards to one side, such design can carry out all-round washing to the soft tissue and the infected bone of infected part, effectively improve the effect of washing, the probability of infection recurrence has been reduced to a certain extent, the misery and the economic burden of secondary operation for the patient have been avoided, the effectiveness of postoperative washing has been improved, the actual treatment effect of operation has been improved greatly.

Specifically, for the promotion that realizes the drainage effect, backward flow mouth 6 is arranged in a row along drainage inner tube 1's axial, and every row includes a plurality of backward flow mouths 6 that arrange along drainage inner tube 1's circumference equipartition, in addition, also can set up backward flow mouth 6 on drainage inner tube 1's preceding terminal surface.

In other embodiments, still fix on the urceolus wall of drainage inner tube 1 and set up fixation nut 8, wash and be equipped with on the tail end outer wall of urceolus 2 with fixation nut 8 complex external screw thread, drainage inner tube 1 inserts from washing 2 tail ends of urceolus and washes urceolus 2 after, connect fixation nut 8 soon on washing the external screw thread of urceolus 2 tail ends, can firmly fix drainage inner tube 1 on washing urceolus 2, meanwhile, the fender ring 7 that is located the rearmost end then will wash the front end closure of urceolus 2, thereby at drainage inner tube 1, wash urceolus 2 fixation nut 8 and keep off and enclose between the ring 7 and enclose and wash chamber 3. When the drainage inner cylinder 1 is required to be detached from the washing outer cylinder 2, the drainage inner cylinder 1 can be detached from the tail end of the washing outer cylinder 2 only by loosening the fixing nut 8 and pulling out the drainage inner cylinder 1 from the tail end of the washing outer cylinder 2, and the drainage inner cylinder 1 and the washing outer cylinder 2 are convenient to assemble.

In this embodiment, drainage inner tube 1 can be dismantled with washing urceolus 2 and be connected, if the drainage time is longer, the soft tissue is grown into or the necrotic tissue is detained and is aroused the backward flow when not smooth, can fix on the other hand wash urceolus 2, on the other hand loosen external fixation nut 8 of drainage inner tube 1 soon, manual front and back push-and-pull drainage inner tube 1, make the space increase once more around the backward flow mouth 6, realize normal drainage, the service life that drainage device was washed in this effect extension greatly, satisfy clinical treatment cycle, the effect of operation has been guaranteed, improve doctor and patient satisfaction, reduce patient's economic burden.

Example 2

Referring to fig. 3 and 4, different from embodiment 1, the flushing drainage device provided by this embodiment further includes a drill rod 9, a drill bit is provided at the front end of the drill rod 9, the drill rod 9 can pass through the flushing outer cylinder 2 to perform drilling treatment on the bone surface to be windowed, when the bone surface needs to be drilled, the fixing nut 8 is only required to be unscrewed, the drainage inner cylinder 1 is withdrawn from the tail end of the flushing outer cylinder 2, the drill rod 9 is inserted from the tail end of the flushing outer cylinder 2, and drilling treatment can be performed on the bone surface to be windowed.

It should be explained that, in practical application, a guide cylinder 10 for guiding the insertion of the drill rod 9 is further arranged between the flushing outer cylinder 2 and the drill rod 9, the guide cylinder 10 can be withdrawn from the tail end of the flushing outer cylinder 2, the front end of the guide cylinder 10 is flush with the front end of the flushing outer cylinder 2, the tail end extends out of the flushing outer cylinder 2 and is in threaded connection with a threaded sleeve 11, a limit block 12 is fixedly arranged on the drill rod 9 behind the threaded sleeve 11, the threaded sleeve 11 has a first position and a second position on the guide cylinder 10, and when the threaded sleeve 11 is located at the first position and is abutted against the limit block 12, the front end of the drill rod 9 is flush with the front end of the flushing outer cylinder 2; when the threaded sleeve 11 is in the second position and abuts against the stop block 12, the drill rod 9 passes through the flushing outer cylinder 2 and extends out by a set distance.

In this embodiment, the drill bit drilling process, the limit structure that thread bush 11 and stopper 12 are constituteed can carry out accurate control to the degree of depth that the drill bit bored into, can effectively avoid driving into too deeply because of the drill bit, destroys normal other positions sclerotin, causes the production of complication problems such as new hair fracture or infectious liquid diffusion, has reduced the operation degree of difficulty moreover, utilizes the standardization of intraoperative bone windowing operation technique.

Specifically, the limiting block 12 comprises a locking sleeve 13 and a locking nut 14 screwed on the locking sleeve 13 to control the locking sleeve 13 to open and close, after the drill rod 9 passes through the elastic locking sleeve 13, the elastic gripping sheet on the locking sleeve 13 is controlled to contract and hold the drill rod 9 tightly by screwing the locking nut 14, so that the locking sleeve 13 can be firmly fixed on the drill rod 9, when the locking sleeve 13 needs to be detached from the drill rod 9, the locking nut 14 only needs to be unscrewed to control the elastic gripping sheet on the locking sleeve 13 to expand, and the locking sleeve 13 can be withdrawn from the drill rod 9.

The embodiment of the invention also provides a method for treating osteomyelitis, which comprises the steps of firstly incising the skin of a focus bone part, performing intermittent separation of subcutaneous fascia, and inserting the washing outer cylinder 2 through a muscle gap until the front end of the washing outer cylinder 2 is abutted against the bone surface to be operated; then the guide cylinder 10 is inserted into the washing outer cylinder 2, and the front end of the guide cylinder 10 is abutted against the bone surface to be operated; inserting the drill rod 9 into the guide cylinder 10, and enabling the front end of the drill rod 9 to be abutted against the bone surface to be operated, wherein at the moment, the rear end of the threaded sleeve 11 is abutted against the front end of the limiting block 12; then, according to the requirement of the driving depth of a drill bit at the front end of the drill rod 9 in the operation, screwing the threaded sleeve 11 to enable the threaded sleeve 11 to move forwards for a set distance along the flushing outer cylinder 2; then, starting the drilling machine, starting drilling, and finishing drilling when the block to be positioned abuts against the threaded sleeve 11 again; then the drill rod 9 and the guide cylinder 10 are pulled out, the drainage inner cylinder 1 is inserted into the washing outer cylinder 2, and the two ends of the washing outer cylinder 2 are sealed, so that a washing cavity 3 is formed between the drainage inner cylinder 1 and the new outer cylinder, after the surgical focus is cleared, a connected washing reflux device penetrates into a focus area through normal skin and is placed in an inner cavity of an infected bone or between the infected bone and soft tissue, and then the soft tissue and the skin of a surgical area are sutured layer by layer; at the moment, sterile flushing fluid flows into the flushing cavity 3 from the fluid inlet 5 and is sprayed out from the flushing port 4 to flush purulent substances in an infected bone inner cavity, after the purulent substances in the infected bone inner cavity are flushed completely, a flushing reflux device can be placed in a closed cavity formed by bones and surrounding soft tissues to carry out postoperative continuous flushing, and the flushed flushing fluid after flushing is adsorbed into the drainage inner cylinder 1 by the reflux port 6 under the action of negative pressure and is discharged out of a human body from the tail end of the drainage inner cylinder 1.

Any embodiment disclosed herein above is meant to disclose, unless otherwise indicated, all numerical ranges disclosed as being preferred, and any person skilled in the art would understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Since the numerical values are too numerous to be exhaustive, some of the numerical values are disclosed in the present invention to illustrate the technical solutions of the present invention, and the above-mentioned numerical values should not be construed as limiting the scope of the present invention.

Meanwhile, if the invention as described above discloses or relates to parts or structural members fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).

In addition, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated. Any part provided by the invention can be assembled by a plurality of independent components or can be manufactured by an integral forming process.

The above examples are merely illustrative for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Nor is it intended to be exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.