CN204684301U - A kind of osteomyelitis closes irrigation and drainage device - Google Patents

Abstract

The utility model discloses a closed flushing and drainage device for osteomyelitis, which comprises a strip-shaped porous foam, a drainage tube and a flushing tube embedded in the porous foam; the drainage tube includes two A segment of inner tube and a segment of outer tube, and the two inner tubes are connected to two opposite ports of the tee joint, the outer end of the inner tube extends to the end of the porous foam; the inner tube has multiple groups of drainage holes along the circumference . The outer end of the outer tube is connected with a joint, and the other end of the joint is connected with a connecting pipe for connecting to a negative pressure source; the flushing pipe includes two, and the flushing pipe penetrates from the side wall of the joint and passes through the outer pipe in turn. pipe and three-way joint, the other ends of the two flushing pipes pass through the drainage holes in the middle side walls of the two inner pipes respectively, and extend to the two ends of the porous foam. The utility model can be more conveniently loaded into the bone marrow cavity, so that the lesion can be fully and completely drained.

Description

A closed flushing and drainage device for osteomyelitis

technical field

The utility model belongs to the field of medical equipment, in particular to a structure of a closed flushing and drainage device for osteomyelitis surgery.

Background technique

Chronic osteomyelitis has a long treatment cycle and is prone to recurrence. It has always been one of the most difficult diseases for clinical orthopedic surgeons. How to shorten the treatment cycle, reduce the limb disability rate and improve its cure rate has always been the direction of clinical orthopedic surgeons' efforts. It has been reported in the literature that VSD negative pressure drainage in the treatment of complex traumatic osteomyelitis has a good effect on controlling infection and a high cure rate, but there are still some problems such as limited drainage range, insufficient and thorough drainage of the lesion, retention of part of the flushing fluid and secretions, and drainage The tube is easy to clog and other problems. From March 2011 to December 2013, we performed two-stage bone grafting combined with tissue flap transplantation after modified VSD intramedullary drainage on 40 patients with chronic osteomyelitis, and the results were satisfactory.

Surgical method: After the lesion is removed, 2 small pieces of VSD foam (manufactured by Wuhan VSD Medical Technology Co., Ltd.) are spliced together. The width of the foam is slightly larger than the width of the groove, and the length exceeds the length of the groove by 2cm. Each piece of foam has a drainage tube and a flushing tube , the foam was stuffed into the bone marrow cavity, the wound without defect was directly sutured, and the surface of the wound with soft tissue defect was covered with another piece of VSD to temporarily close the wound, and the biological semipermeable film sealed the entire wound. After the patient returns to the ward, connect the upper drip tube with the isotonic saline bottle and the VSD negative pressure suction device as soon as possible, and perform continuous flushing and suction. Add sensitive antibiotics, such as gentamicin, to the flushing solution. Generally, 80,000 u of gentamicin is added to every 500 ml of isotonic saline, 3 times a day, 500ml each time. The upper drainage tube should be clamped during flushing. Aspirated from the lower drainage tube. After 3-5 days, the VSD device was removed, and the granulation in the medullary cavity was taken again for bacterial culture + drug sensitivity, and the wound was thoroughly debrided and rinsed. The patient was implanted with antibiotic calcium sulfate and autologous bone in the bone cavity, and the first-stage wound repair was performed at the same time.

After the first debridement, the medullary cavity was slotted and filled with VSD for continuous negative pressure drainage, and intermittently rinsed with sensitive antibiotics. On the one hand, the accumulated blood in the medullary cavity was fully drained and the culture medium for bacterial growth was removed. On the other hand, The continuous negative pressure drainage of the bone surface through the VSD can effectively reduce the number of bacteria multiplied by residual bacteria. Furthermore, the intermittent irrigation of sensitive antibiotics can inhibit or kill the residual bacteria, and the positive rate of bacterial culture on the bone graft bed has increased from 40 % to 5%, creating a cleaner bone graft bed for the repair of bone defects, thereby further improving the infection control rate of osteomyelitis and shortening the wound healing time.

However, the currently used VSD foam is used after cutting and splicing to make it more compatible with the bone marrow cavity; there are also defects in the design of the irrigation tube and drainage tube, which cannot fully and completely drain the lesion, and there is blockage of the drainage tube question.

Contents of the invention

The technical problem to be solved by this utility model is to provide a closed irrigation and drainage device with a reasonable structure and specially used for the treatment of osteomyelitis in view of the deficiencies of the existing technology.

In order to realize the purpose of this utility model, the following technical schemes are adopted to realize it: a closed flushing and drainage device for osteomyelitis, including a strip-shaped porous foam, and a drainage tube and a flushing tube embedded in the porous foam; The pipe includes two sections of inner pipe and one section of outer pipe connected by a three-way joint, and the two inner pipes are connected to two opposite ports of the three-way joint, and the outer end of the inner pipe extends to the end position of the porous foam; The inner tube is provided with multiple groups of drainage holes along the circumferential direction, and each group of drainage holes is arranged equidistantly along the length direction of the inner tube, and the positions of the adjacent two groups of drainage holes of the inner tube along the circumferential direction are staggered from each other. The outer end of the outer tube is connected to a joint, and the other end of the joint is connected to a connecting pipe for connecting to a negative pressure source; the flushing pipe includes two, and the flushing pipe penetrates from the side wall of the joint and passes through the outer pipe in turn. pipe and three-way joint, and two flushing pipes pass through the drainage holes in the middle side walls of the two inner pipes respectively, and extend to the two ends of the porous foam.

As a preferred solution: the flushing pipe is interference-fitted with the joint and connected in a sealed manner, the end of the flushing pipe is connected with a sealing head, and the side wall of the sealing head is connected with a sealing plug that cooperates and is sealingly connected with the sealing head through a soft connecting rod.

As a preferred solution: the inner diameter of the connecting pipe is smaller than the inner diameter of the outer pipe; the inner diameter of the outer pipe is greater than twice the outer diameter of the flushing pipe.

Compared with the prior art, the beneficial effect of the utility model is that the closed flushing and drainage device of the utility model is designed as a T-shaped structure, which can be easily loaded into the bone marrow cavity, reduces the workload of doctors, and shortens the operation time .

Description of drawings

Fig. 1 is a structural representation of the utility model.

1. Porous foam; 2. Drainage tube; 21. Inner tube; 22. Outer tube; 3. Flushing tube; 4. Joint; 5. Connecting tube; 6. Sealing head; 7. Sealing plug.

Detailed ways

The specific embodiment of the utility model is described in detail below according to the accompanying drawings.

As shown in Figure 1, the present embodiment is a closed irrigation and drainage device for osteomyelitis, including a strip-shaped porous foam 1, and a drainage tube 2 and a flushing tube 3 embedded in the porous foam; the drainage tube includes There are two sections of inner pipe 21 and one section of outer pipe 22 connected by a three-way joint, and the two inner pipes are connected to two opposite ports of the three-way joint, and the outer end of the inner pipe extends to the end position of the porous foam; The inner tube is provided with multiple groups of drainage holes along the circumference, and each group of drainage holes is arranged equidistantly along the length direction of the inner tube, and the positions of the adjacent two groups of drainage holes of the inner tube along the circumferential direction are staggered from each other. The outer end of the outer tube is connected to a joint 4, and the other end of the joint is connected to a connecting pipe 5 for connecting to a negative pressure source; the flushing pipe includes two, and the flushing pipe penetrates from the side wall of the joint and passes through in turn. Pass through the outer pipe and the tee joint, and the two flushing pipes pass through the drainage holes in the middle side walls of the two inner pipes respectively, and extend to the two ends of the porous foam.

Since the two flushing pipes pass through the drainage holes on the side walls of the middle part of the two inner pipes respectively, the positions of the inner pipe at the bend of the tee joint and the bend at the outlet of the drainage hole are staggered, avoiding two bends of the inner pipe. The folding point is too close to cause the connection between the inner tube of the drainage tube and the tee joint to be unobstructed.

The flushing pipe is interference-fitted with the joint and connected in a sealed manner. The end of the flushing pipe is connected with a sealing head 6, and the side wall of the sealing head is connected with a sealing plug 7 that is matched and sealingly connected with the sealing head through a soft connecting rod.

The inner diameter of the connecting pipe is smaller than the inner diameter of the outer pipe; the inner diameter of the outer pipe is twice the outer diameter of the flushing pipe. The outer tube needs to accommodate two flushing tubes, so the inner diameter is designed to be larger to ensure smooth drainage. The connecting tube is smaller than the outer tube, that is, the connecting tube has the same caliber as the ordinary drainage device, which is convenient for use with the existing negative pressure. source connection.

When in use, the two ends of the porous foam are trimmed to make the length fit to the length of the bone marrow cavity, and then the porous foam is filled into the bone marrow cavity. After the wound is sutured, the entire wound is sealed with a biological semipermeable film. After the patient returns to the ward, connect the upper drip tube to the isotonic saline bottle and negative pressure source as soon as possible, and perform continuous flushing and suction.

The closed flushing and drainage device of the utility model is designed in a T-shaped structure, without splicing the VSD foam, and can be conveniently loaded into the bone marrow cavity, so that the lesion can be fully and thoroughly drained. Secondly, the design of the irrigation tube makes the irrigation more sufficient, and greatly reduces the problem of drainage tube blockage caused by the long stroke of the drainage tube.

Claims (3)

1. A closed flushing and drainage device for osteomyelitis, characterized in that: it includes strip-shaped porous foam, and a drainage tube and a flushing tube embedded in the porous foam; The drainage tube includes two sections of inner tube and one section of outer tube connected by a three-way joint, and the two inner tubes are connected to two opposite ports of the three-way joint, and the outer end of the inner tube extends to the end of the porous foam head position; The inner tube is provided with multiple groups of drainage holes along the circumference, each group of drainage holes is arranged equidistantly along the length direction of the inner tube, and the positions of the adjacent two groups of drainage holes along the circumference of the inner tube are staggered from each other; The outer end of the outer tube is connected to a joint, and the other end of the joint is connected to a connecting pipe for connecting to a negative pressure source; The flushing pipes include two. The flushing pipes penetrate from the side wall of the joint and pass through the outer pipe and the three-way joint in turn. to both ends of the porous foam. 2. A closed flushing and drainage device for osteomyelitis according to claim 1, characterized in that: the flushing tube and the joint are in an interference fit and sealed connection, the end of the flushing tube is connected with a sealing head, and the side wall of the sealing head passes through A soft connecting rod is connected with a sealing plug which cooperates with the sealing head and is sealingly connected. 3. A closed flushing and drainage device for osteomyelitis according to claim 1, characterized in that: the inner diameter of the connecting tube is smaller than the inner diameter of the outer tube; the inner diameter of the outer tube is greater than 2 times the outer diameter of the flushing tube times.