Water sac dilator for periosteal distraction

Abstract

The utility model discloses a water sac dilator for periosteal distraction, which comprises a dilation mechanism, and a liquid inlet of the dilation mechanism is communicated with a liquid outlet of an injection mechanism through a connecting mechanism. The expansion mechanism comprises a water bag, and developing lines are arranged on the two sides of the water bag; the connecting mechanism comprises a water injection pipe communicated with a liquid inlet of the water bag, and a closable connector is arranged at the end, away from the water bag, of the water injection pipe. A distraction plate is not needed, continuous traction of the periosteum can be achieved only through expansion of the water bag, and the periosteum distraction device has the advantages of being reasonable in structure, convenient to operate, practical and efficient.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and particularly relates to a water bag expander used for periosteal stretching. Background Art

[0002] In recent years, periosteal stretching has been widely used for vascular repair and reconstruction. This surgery mainly uses a periosteal stretching plate to continuously stretch the periosteum to stimulate angiogenesis.

[0003] Currently, periosteal distraction plates have the following defects: (1) The screws and distraction plates are not firmly fixed in the early stage and are prone to fall off. Once they fall off, they should be reinstalled under local anesthesia; (2) The screws need to be rotated regularly to apply pressure to the distraction plate, which can irritate the skin wound and pose a risk of infection; (3) The surgical method for removing the distraction plate is relatively complicated; (4) The distraction plate cannot be too long, otherwise it will be difficult to perform effective traction.

[0004] A Chinese utility model patent with announcement number CN213606783U discloses a water-injected periosteal stretcher, which includes two stretching plates and a water-injection bag in the middle. The two stretching plates are arranged in parallel and opposite to each other, and the water bag is arranged between the two stretching plates. The water bag is provided with a water injection tube for injecting liquid. The two stretching plates are placed between the periosteum and the bone, and the water injection port of the water injection tube is exposed outside the skin. After the physiological saline is injected, the water bag expands the stretching plates, thereby achieving continuous traction on the periosteum. However, the periosteal stretcher has a complex structure and is very difficult to implant and remove surgically. Summary of the invention

[0005] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the utility model is to provide a water bag expander for periosteal distraction surgery, which does not require a distraction plate and only achieves continuous traction of the periosteum through the expansion of the water bag. It has the advantages of reasonable structure, easy operation, practicality and high efficiency.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A water bag dilator for periosteal distraction surgery comprises an expansion mechanism 1, wherein a liquid inlet of the expansion mechanism 1 is connected to a liquid outlet of an injection mechanism 3 via a connecting mechanism 2; the expansion mechanism 1 comprises a water bag 11, and both sides of the water bag 11 are provided with developing lines 12; the connecting mechanism 2 comprises a water injection pipe 21 connected to the liquid inlet of the water bag 11, and a closable joint 22 is provided at one end of the water injection pipe 21 away from the water bag 11; a pressure monitoring device 4 is provided on the water injection pipe 21.

[0008] The length of the developing line 12 is smaller than the longitudinal length of the water bag 11 .

[0009] The joint 22 is a column with an external thread structure, and a self-closing valve 23 is provided at the connection point between the joint 22 and the water injection pipe 21 .

[0010] The self-closing valve 23 is a composite column structure consisting of a large column 24 with a large front diameter and a small column 25 with a small rear diameter. The large column 24 is located inside the water injection pipe 21, and the small column 25 is located at the connection between the joint 22 and the water injection pipe 21.

[0011] The injection mechanism 3 includes a barrel 31, the interior of the barrel 31 includes a threaded portion 32 threadedly connected to the joint 22, a baffle 33 is provided at the end of the threaded portion away from the joint 22, and a head channel 34 extending into the threaded portion 32 is provided in the middle of the baffle 33; a smooth portion 35 is formed inside the barrel 31 away from the threaded portion 32, and a push rod 36 is provided on the smooth portion 35, and push disks 37 matching the inner diameter of the barrel 31 are provided at both ends of the push rod 36.

[0012] The water bag 11 and the water injection pipe 21 are integrally formed and connected.

[0013] The water bag 11, the water injection pipe 21 and the self-closing valve 23 are all made of medical silicone rubber.

[0014] The water bag 11 is in any shape of rectangle, square, circle, oval or irregular.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] 1. The water bag expander of the utility model only needs a 2 cm surgical incision when implanted. Compared with the periosteal distraction plate, it does not need to add a surgical incision in the middle, nor does it need to implant fixing screws, which has little trauma and is easy to implant.

[0017] 2. The utility model can monitor the pressure in the water bag in real time by setting a pressure monitoring device, thereby achieving continuous and constant stretching of the periosteum; compared with the traditional stretching plate, it can not only quantify the stretching force, but also avoid complications such as screw falling off and screw tract infection.

[0018] 3. The utility model sets a self-closing valve at the water injection port of the water bag, and uses a matching injection mechanism to quickly inject normal saline. After the injection, no additional device is needed to close the water injection port, and the operation is very convenient. After the stretching is completed, only the normal saline needs to be extracted, and the water bag can be extracted under local anesthesia. The secondary operation has little trauma, is simple to operate, and is convenient for clinical operation.

[0019] In summary, the water bag expander of the utility model does not need to set a stretching plate, and only realizes the continuous stretching of the periosteum by the expansion of the water bag, and has the characteristics of simple structure, convenient production, low cost and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of the water bag dilator provided by the utility model.

[0021] Figure 2 This is a structural schematic diagram of the expansion mechanism and the connection mechanism provided by the utility model.

[0022] Figure 3 This is a cross-sectional schematic diagram of the expansion mechanism and the connection mechanism provided by the utility model.

[0023] Figure 4 This is a cross-sectional schematic diagram of the joint provided by the utility model.

[0024] Figure 5 This is a cross-sectional schematic diagram of the injection mechanism provided by the utility model.

[0025] In the figure: expansion mechanism 1, water bag 11, developing line 12, connecting mechanism 2, water injection pipe 21, joint 22, self-closing valve 23, large cylinder 24, small cylinder 25, injection mechanism 3, barrel 31, threaded part 32, baffle 33, head channel 34, smooth part 35, push rod 36, push plate 37, pressure monitoring device 4, water injection branch 5. DETAILED DESCRIPTION

[0026] The technical solution of the utility model is further introduced below in conjunction with the accompanying drawings.

[0027] See also Figure 1 , Figure 2 A water bag dilator for periosteal distraction surgery includes an expansion mechanism 1, a liquid inlet of the expansion mechanism 1 is connected to a liquid outlet of an injection mechanism 3 through a connecting mechanism 2; the expansion mechanism 1 includes a water bag 11, and both sides of the water bag 11 are provided with a developing line 12, the length of the developing line 12 is less than the longitudinal axis length of the water bag 11, and is used for fluoroscopic positioning of the position of the water bag 11 during surgery.

[0028] See also Figure 3 The connecting mechanism 2 includes a water injection pipe 21 connected to the liquid inlet of the water bag 11. The water bag 11 and the water injection pipe 21 are integrally formed and connected. A closable joint 22 is provided at one end of the water injection pipe 21 away from the water bag 11; the joint 22 is a column with an external thread structure, and a self-closing valve 23 is provided at the connection between the joint 22 and the water injection pipe 21. The self-closing valve 23 is a composite column structure composed of a large column 24 with a large diameter at the front end and a small column 25 with a small diameter at the rear end. The large column 24 is located inside the water injection pipe 21, and the small column 25 is located at the connection between the joint 22 and the water injection pipe 21. Figure 4 shown.

[0029] See also Figure 5The injection mechanism 3 includes a barrel 31, the interior of the barrel 31 includes a threaded portion 32 threadedly connected to the joint 22, a baffle 33 is provided at the end of the threaded portion away from the joint 22, and a head channel 34 extending into the threaded portion 32 is provided in the middle of the baffle 33; a smooth portion 35 is formed inside the barrel 31 away from the threaded portion 32, and a push rod 36 is provided on the smooth portion 35, and push disks 37 matching the inner diameter of the barrel 31 are provided at both ends of the push rod 36.

[0030] See also Figure 3 The liquid outlet of the water injection pipe 21 is connected to the liquid inlet of the water injection branch 5. The water injection branch 5 is provided with a pressure monitoring device 4. The pressure monitoring device 4 can display the pressure in the water bag 11 in real time, guide the water injection amount, and ensure that the periosteum is subjected to a constant tensile force.

[0031] The water bag 11, the water injection pipe 21 and the self-closing valve 23 are all made of medical silicone rubber; the water bag 11 is any one of rectangular, square, circular, oval or irregular shapes, and its longitudinal axis, horizontal axis and expansion height can be set to different models according to the needs of human surgery.

[0032] The water injection pipe 21 is located outside the body and mainly serves to transport saline solution. The diameter and length of the water injection pipe 21 are set to different specifications according to the needs of the human body.

[0033] When the injection mechanism 3 is threadedly connected to the connector 22, the head channel 34 squeezes the self-closing valve 23 to slide into the water injection pipe 21, so that the self-closing valve 23 opens, allowing saline to flow into the water injection pipe 21. When the injection mechanism 3 is removed, the saline in the water injection pipe 21 squeezes the self-closing valve 23 to slide outward, and the self-closing valve 23 blocks the water injection port to prevent the saline from flowing out.

[0034] The working principle of the utility model is:

[0035] During the operation, a 2 cm surgical incision is made, and the periosteum and bone are separated to an appropriate length and width with a periosteal stripper, and an expansion mechanism of a suitable type is selected. The water bag 11 is clamped with long flat forceps or straight forceps and implanted between the periosteum and the bone. The C-arm fluoroscopic development line 12 is used to observe the position of the water bag 11. When it is implanted in a suitable position, the wound is sutured immediately; after the injection mechanism sucks in normal saline, it is threadedly connected with the joint 22, and the push plate 37 is manually pushed. When normal saline begins to be injected into the water bag 11, the pressure monitoring device 4 is observed in real time. When the pressure meets the periosteum stretching requirement, the injection is stopped; the pressure monitoring device 4 is observed every day thereafter, and normal saline is injected into the water bag 11 in time according to the pressure change to keep the stretching force at a constant value; after the stretching is completed, the normal saline in the water bag 11 is extracted with the injection mechanism 3, and then the water bag 11 is pulled out along the original surgical incision. The entire operation has small trauma, simple operation, and good patient compliance.

Claims

1. A water bag expander for periosteal distraction, characterized in that: The invention comprises an expansion mechanism (1), wherein a liquid inlet of the expansion mechanism (1) is connected to a liquid outlet of an injection mechanism (3) via a connecting mechanism (2); the expansion mechanism (1) comprises a water bag (11), and both sides of the water bag (11) are provided with developing lines (12); the connecting mechanism (2) comprises a water injection pipe (21) connected to the liquid inlet of the water bag (11), and a closable joint (22) is provided at one end of the water injection pipe (21) away from the water bag (11); and a pressure monitoring device (4) is provided on the water injection pipe (21).

2. The water-bag dilator for periosteal distraction according to claim 1, characterized in that: The length of the developing line (12) is smaller than the longitudinal axis length of the water bag (11).

3. The water-bag dilator for periosteal distraction according to claim 1, characterized in that: The joint (22) is a column with an external thread structure, and a self-closing valve (23) is provided at the connection point between the joint (22) and the water injection pipe (21).

4. The water-bag dilator for periosteal distraction according to claim 3, characterized in that: The self-closing valve (23) is a composite column structure consisting of a large column (24) with a large front diameter and a small column (25) with a small rear diameter. The large column (24) is located inside the water injection pipe (21), and the small column (25) is located at the connection between the joint (22) and the water injection pipe (21).

5. The water-bag dilator for periosteal distraction according to claim 1, characterized in that: The injection mechanism (3) comprises a barrel (31), the interior of the barrel (31) comprises a threaded portion (32) threadedly connected to a joint (22), a baffle (33) is arranged at the end of the threaded portion away from the joint (22), and a head channel (34) is arranged in the middle of the baffle (33) and extends into the threaded portion (32); a smooth portion (35) is formed inside the barrel (31) away from the threaded portion (32), a push rod (36) is arranged on the smooth portion (35), and push discs (37) matching the inner diameter of the barrel (31) are provided at both ends of the push rod (36).

6. The water-bag expander for periosteal distraction according to claim 1, characterized in that: The water bag (11) and the water injection pipe (21) are integrally formed and connected.

7. The water-bag expander for periosteal distraction according to claim 3, characterized in that: The water bag (11), the water injection pipe (21) and the self-closing valve (23) are all made of medical silicone rubber.

8. The water-bag expander for periosteal distraction according to claim 1, characterized in that: The water bag (11) is any one of a rectangular, square, circular, oval or irregular shape.

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