Minimally invasive medullary space focus cleaner for osteomyelitis

Abstract

The utility model discloses an osteomyelitis minimally invasive medullary cavity focus cleaner which comprises a group of screws which are symmetrically arranged, a channel is arranged in the screws in a penetrating mode, a penetrating-in hole and a penetrating-out hole are formed in the two ends of the channel respectively, the penetrating-in hole is formed in the ends, away from the pointed ends, of the screws, the penetrating-out hole is formed in the side walls of the screws, a guide pipe is arranged in the channel in a penetrating mode, and an inner guide pipe is arranged in the guide pipe in a penetrating mode. The channels communicated with the medullary cavity are arranged on the bones on the two sides of the focus respectively, flushing fluid is flushed into one side of the focus along the channels to flush and dilute diseased tissue, and the diseased tissue which falls off due to flushing or is improved in liquidity due to dilution is extracted from the other side of the focus along the channels. Therefore, the aim of cleaning the focus in the medullary cavity is fulfilled. The screw is used for perforating a bone with a medullary cavity focus needing to be removed, the hollow hose type catheter penetrates into the medullary cavity along a channel, the inner catheter made of the flexible material penetrates into the catheter, direct contact and friction between the catheter and medullary are reduced, and reverse transfer and infection expansion of the osteomyelitis focus are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of osteomyelitis surgical auxiliary devices, and in particular relates to a minimally invasive medullary cavity lesion cleaner for osteomyelitis. Background Art

[0002] Osteomyelitis is an inflammatory disease caused by bacterial infection of the bone marrow, cortical periosteum. Acute osteomyelitis presents with redness, swelling, heat and pain at onset. If not diagnosed in time, it turns into chronic osteomyelitis, with sinus pus, dead bone and cavitation. In severe cases, it often endangers the patient's life, and sometimes amputation is the only emergency measure to save life, leaving the patient with lifelong disability. Clinical treatment consumes a lot of manpower, material and financial resources but the effect is poor. Repeated attacks and years of non-healing seriously affect the patient's physical and mental health and ability to work.

[0003] At present, the treatment of osteomyelitis is often based on surgery. Thorough surgical removal of lesions is the basis for the radical cure of osteomyelitis. In the acute stage, the inflammatory tissue in the bone marrow is scraped out after drilling and grooving the bone marrow. In the chronic stage, a large segment of osteotomy is performed and the medullary cavity is opened to scrape out the inflammatory tissue. Then a high-pressure pulse flushing gun is used to repeatedly high-pressure flush with a large amount of saline (9-12L) to remove the contaminated tissue, debris and surgical residues after debridement, prevent recurrence after bone marrow transplantation, reduce adhesion and the use of postoperative antibiotics, reduce the risk of fat embolism, and reduce the infection rate and surgical complications. The current surgery is traumatic and complicated, and the pressure is high during the flushing process. The existing splash shield often cannot prevent the splashing of the flushing fluid of the osteomyelitis infected tissue, and the amount of flushing waste fluid is large and needs to be handled in time to avoid contaminating the operating table and contaminating medical staff. The self-charging and self-priming design of the flushing gun often cannot meet the wastewater treatment needs of large amounts of saline flushing for osteomyelitis. Utility Model Content

[0004] The utility model aims to provide a minimally invasive medullary cavity lesion cleaner for osteomyelitis to solve the above problems.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A minimally invasive medullary cavity lesion cleaner for osteomyelitis comprises a group of symmetrically arranged screws, wherein channels are provided in the screws, and entry holes and exit holes are provided at both ends of the channels respectively. The entry hole is provided at the end of the screw away from the tip, and the exit hole is provided on the side wall of the screw. A catheter is provided in the channel, and an inner catheter is provided in the catheter.

[0007] In order to further realize the utility model, the channel is "L"-shaped, including a longitudinal channel and a transverse channel, and the angle between the longitudinal channel and the transverse channel is 90°, which is an arc chamfer.

[0008] In order to further realize the utility model, the shape of the conduit matches the channel, and the outlet ends of the conduits of the two screws are arranged to face each other and are located on the same straight line.

[0009] In order to further realize the utility model, the through hole is arranged on the side wall of the screw at a position 0.8-2.2 cm away from the screw tip.

[0010] In order to further realize the utility model, the outer diameter of the screw is 0.6-1.0 cm, and the length of the threaded portion of the screw is at least 3.2 cm.

[0011] In order to further realize the utility model, the inner diameter of the channel is 0.3-0.7 cm.

[0012] In order to further realize the utility model, a water supply mechanism or a water pumping mechanism is provided at the penetration end of the inner conduit.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model arranges channels communicating with the medullary cavity on the bones at both sides of the lesion respectively, flushes the flushing liquid into one side of the lesion along the channels to flush and dilute the diseased tissue, and draws out the diseased tissue that has fallen off due to flushing or has increased fluidity due to dilution from the other side of the lesion along the channels, thereby achieving the purpose of cleaning the lesion in the medullary cavity.

[0015] The utility model is provided with a screw with a pointed head, which can directly perforate bones such as femur, tibia, humerus, etc., where medullary lesions need to be removed. The catheter penetrates into the medullary cavity along the channel set in the screw. The catheter is a hollow hose that can be shaped, that is, it can smoothly play a guiding role at the bend. The inner catheter is made of flexible material, such as plastic or resin material, and penetrates from the hollow cavity of the catheter, which can reduce direct contact and friction between the catheter and the medulla during flushing, and avoid reverse metastasis of osteomyelitis lesions and expansion of infection.

[0016] The utility model has the advantages of simple structure, small wound surface and strong flexibility and operability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 for Figure 1 A cross-sectional view of

[0019] Figure 3 It is a cross-sectional view of the screw in the utility model;

[0020] The meanings of the accompanying drawings are as follows: 1. screw; 2. channel; 3. entry hole; 4. exit hole; 5. catheter; 6. inner catheter; 7. longitudinal channel; 8. transverse channel; 9. arc chamfer; 10. water supply mechanism; 11. pumping mechanism; 12. bone. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0022] like Figure 1-3 As shown, a minimally invasive medullary cavity lesion cleaner for osteomyelitis, a minimally invasive medullary cavity lesion cleaner for osteomyelitis, comprising a group of symmetrically arranged screws 1, the outer diameter of the screw 1 is 0.6-1.0 cm, the length of the threaded portion of the screw 1 is at least 3.2 cm, a channel 2 is passed through the screw 1, the channel 2 is "L" shaped, the inner diameter of the channel 2 is 0.3-0.7 cm, and the longitudinal channel 7 and the transverse channel 8 are included. The angle between the longitudinal channel 7 and the transverse channel 8 is 90°, and the angle is an arc chamfer 9, and the channel 2 An entry hole 3 and an exit hole 4 are respectively provided at both ends of the screw 1, the entry hole 3 is provided at the end of the screw 1 away from the tip, the exit hole 4 is provided on the side wall of the screw 1, and the exit hole 4 is provided on the side wall of the screw 1 at a position 0.8-2.2 cm away from the tip of the screw 1. A conduit 5 is provided in the channel 2, and the shape of the conduit 5 matches the channel 2. The exit ends of the conduits 5 of the two screws 1 are arranged facing each other and located on the same straight line, an inner conduit 6 is provided in the conduit 5, and a water supply mechanism 10 or a pumping mechanism 11 is provided at the entry end of the inner conduit 6.

[0023] Before surgery, the lesion location is determined based on the bone MRI of the diseased segment. The distance (a) from the center of the hole 4 to the tip of the screw 1 is divided into three situations:

[0024] When the lesion is located in the upper 1 / 3 of the tubular bone, a is 1.8-2.2 cm;

[0025] When the lesion is located in the middle of the tubular bone, a is 1.4-1.6 cm;

[0026] When the lesion is located in the lower 1 / 3 of the tubular bone, a is 0.8-1.0 cm.

[0027] During the operation, two screws 1 are first symmetrically driven into the bone 12 on both sides of the lesion, the femur is drilled on the outer side, the tibia is drilled on the anterior medial side, and the humerus is drilled on the outer side. The screw 1 is placed 3-4 cm away from the lesion, and the penetration holes 3 of the two screws 1 are arranged opposite to each other. Then, the catheter 5 is drilled into the channel 2 through the penetration hole 3, and the penetration end of the catheter 5 is penetrated into the medullary cavity through the exit hole 4. Then, the inner catheter 6 is respectively inserted along the catheter 5, one inner catheter 6 is connected to the water supply mechanism 10, and the other inner catheter 6 is connected to the pumping mechanism 11. The pump body of the water supply mechanism 10 is started to fill the medullary cavity with water, or a high-pressure pulse flushing gun is used to flush the medullary cavity at a certain pressure. Flushing the lesion with physiological saline at a certain pressure can promote the dissolution or peeling of the osteomyelitis lesion. The pumping mechanism 11 is started while flushing, and the free tissue, mucus, etc. infected in the medullary cavity are sucked out by a negative pressure or vacuum pump. The lesion is cleaned when the flushing fluid becomes clear. If the osteomyelitis infection is serious and long-term flushing is required, the negative pressure or vacuum pump suction device can be removed, and the components of the device of the utility model except the water supply mechanism 10 or the pumping mechanism 11 are left in the bone tissue, and normal pressure is used for continuous flushing during daily care.

[0028] The operation needs to be performed in the operating room, and the anesthesiologist needs to perform nerve block anesthesia or spinal anesthesia. After the operation, screw 1 is left in the bone, catheter 5 is fixed to the skin, and inner catheter 6 can be connected to a large bag of saline for continuous flushing 6×3000ml per day. After 21 days of routine flushing, the screw 1, catheter 5, inner catheter 6 and other flushing devices are removed. The nail channel skin is routinely cleaned, disinfected and cared for at the junction of screw 1 and the skin.

Claims

1. A minimally invasive medullary cavity lesion cleaner for osteomyelitis, characterized in that: The invention comprises a group of screws (1) arranged symmetrically, a channel (2) being provided in the screw (1), an entry hole (3) and an exit hole (4) being provided at both ends of the channel (2), the entry hole (3) being provided at the end of the screw (1) away from the tip, the exit hole (4) being provided on the side wall of the screw (1), a conduit (5) being provided in the channel (2), and an inner conduit (6) being provided in the conduit (5).

2. The minimally invasive medullary cavity lesion cleaner for osteomyelitis according to claim 1, characterized in that: The channel (2) is L-shaped and comprises a longitudinal channel (7) and a transverse channel (8). The angle between the longitudinal channel (7) and the transverse channel (8) is 90°, and the angle is an arc chamfer (9).

3. The minimally invasive medullary cavity lesion cleaner for osteomyelitis as claimed in claim 2, characterized in that: The shape of the conduit (5) matches the channel (2), and the outlet ends of the conduits (5) of the two screws (1) are arranged facing each other and located on the same straight line.

4. The minimally invasive medullary cavity lesion cleaner for osteomyelitis as claimed in claim 3, characterized in that: The through hole (4) is arranged on the side wall of the screw (1) at a position 0.8-2.2 cm away from the tip of the screw (1).

5. The minimally invasive medullary cavity lesion cleaner for osteomyelitis as claimed in claim 4, characterized in that: The outer diameter of the screw (1) is 0.6-1.0 cm, and the length of the threaded portion of the screw (1) is at least 3.2 cm.

6. The minimally invasive medullary cavity lesion cleaner for osteomyelitis as claimed in claim 5, characterized in that: The inner diameter of the channel (2) is 0.3-0.7 cm.

7. The minimally invasive medullary cavity lesion cleaner for osteomyelitis according to claim 6, characterized in that: A water supply mechanism (10) or a water pumping mechanism (11) is provided at the penetration end of the inner conduit (6).

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