[0039] Example 1
[0040] This embodiment provides a drainage device for clinical use, such as Figure 1-6 As shown, it includes an adsorption and drainage unit 2, an adsorption control unit 3 and a drainage pipe 1. The adsorption and drainage unit 2 includes an anti-seepage cover 21, a positive pressure pipe 22 and a negative pressure pipe 23. The middle of the anti-seepage cover 21 is provided with a bottom The open positive pressure cavity 24, the anti-seepage cover member outside the positive pressure cavity 24 is provided with an annular negative pressure cavity 25 with an open bottom, and the negative pressure cavity 25 and the positive pressure cavity 24 are arranged coaxially, specifically :
[0041] like figure 2 and Figure 5 As shown, the anti-seepage cover member 21 includes a top cover 211, an outer spacer ring 212 and an inner spacer ring 213. The outer shelf ring 212 is coaxially fixed on the bottom surface of the top cover 211. The annular surface is flush, and the connection between the outer shelf ring and the top cover is provided with an arc-shaped chamfer; the inner spacer ring 213 is coaxially fixed at the bottom of the top cover in the outer spacer ring, and the space between the outer shelf ring and the inner spacer ring is The space is a negative pressure cavity, and the space in the inner spacer ring is a positive pressure cavity.
[0042] Further, the anti-seepage cover can be made in various ways. For example, the anti-seepage cover is an injection molded part, and the top cover, the outer spacer ring and the inner spacer ring are integral structures.
[0043] The positive pressure chamber 24 is provided with a guide column 4 along the vertical direction, and the middle part of the guide column 4 is vertically provided with a drainage pipe hole 41 penetrating the anti-seepage cover member. The puncture end of the piercing end extends downward out of the guide post, and is sealed with an annular pressure plate 5, which can slide axially along the drainage tube and be locked, specifically:
[0044] like Figure 5 As shown, the top of the guide column 4 is fixedly connected to the bottom surface of the top cover 211, the drainage pipe hole of the guide column 4 penetrates the top cover 211 upward, and the inner hole wall of the drainage pipe hole of the guide column is axially spaced with a plurality of annular Sealing groove, a sealing ring is installed in the annular sealing groove, and the sealing ring protrudes from the annular sealing groove outward. The sealing strength between the drainage tube and the guide column is improved.
[0045] Further, there are various ways of connecting the guide column and the top cover, for example, the guide column and the top cover have an integrated structure; the length dimension of the guide column is a, the thickness dimension of the annular pressure plate is b, and the inner spacer ring The height dimension of is c, where a+b
[0046] The annular pressure plate 5 includes an annular pressure plate body 51 and a limit sleeve 52. The pressure plate body 51 is sealed and slidably sleeved on the puncture end of the drainage tube below the guide column. The limit sleeve 52 is slidably sleeved on the drainage pipe 1 above the pressure plate body 51, and is vertically connected with the lower pressure plate body; the circumferential side wall on one side of the limit sleeve is radially provided with a thread that communicates with the inside of the limit sleeve When the locking bolts are tightened, the tops of the locking bolts 53 will penetrate into the limit sleeve and contact the outer wall of the drainage tube 1 in the limit sleeve, so that the Fixed position.
[0047] The other end of the drainage tube 1 is connected with a liquid storage mechanism for collecting drainage liquid. There are many types of liquid storage mechanisms, for example, the liquid storage mechanism is an existing liquid storage bag or a negative pressure liquid pumping mechanism.
[0048] When placing the puncture end of the drainage tube 1 into the drainage site, the position of the annular pressure plate can be adjusted and fixed according to the depth of the drainage site, so that after the puncture end of the drainage tube 1 is placed in the drainage site, the pressure plate body of the annular pressure plate 5 The 51 will be in contact with the skin 6, which can avoid the problem that the drainage tube is placed too deeply or too shallowly.
[0049] The adsorption control unit 3 includes a control bottle 31, a piston 32 and a negative pressure top spring 33. A control cavity 34 is arranged in the control bottle 31 along the axial direction. The axial seal is divided into an upper control chamber 341 and a lower control chamber 342, the negative pressure top spring 33 is matched and installed in the upper control chamber 341, and the lower control chamber is filled with high-pressure gas, which will push the piston upward when not in use Squeeze the negative pressure top spring to compress the negative pressure top spring; the upper control chamber 341 is in active communication with the negative pressure chamber through the negative pressure pipe 23, the lower control chamber is in active communication with the positive pressure chamber through the positive pressure pipe, and the positive pressure pipe There is a stop valve on it, specifically:
[0050] like Figure 10 As shown, the top of the control bottle 31 is vertically opened with a negative pressure suction hole 311 that communicates with the upper control cavity 341, one end of the negative pressure pipe 23 is connected to the negative pressure suction hole 311, and the other end of the negative pressure pipe 23 is connected to the negative pressure suction hole 311. The negative pressure chamber is in active communication. The bottom of the control bottle 31 is vertically opened with a positive pressure exhaust hole 312 that communicates with the lower control chamber. One end of the positive pressure pipe 22 is connected to the positive pressure exhaust hole, and the other end is connected to the positive pressure chamber. There are many ways to set the stop valve 35, for example: the stop valve 35 is matched and installed on the positive pressure exhaust hole, and the positive pressure pipe communicates with the lower control chamber through the stop valve.
[0051] There are many ways to movably connect the negative pressure pipe 23 with the positive pressure pipe and the anti-seepage cover, for example: image 3 and Figure 4 As shown, the anti-seepage cover member 21 is provided with an active connection assembly 7 for connecting the positive pressure pipe and the negative pressure pipe; the active connection assembly 7 includes a positive pressure quick joint 71 and a negative pressure quick joint 72. The end face is vertically opened with a positive pressure threaded hole 26 that communicates with the positive pressure cavity and a negative pressure threaded hole 27 that communicates with the negative pressure cavity. The positive pressure quick connector and the negative pressure quick connector are respectively matched and installed in the positive pressure threaded hole and negative pressure. In the threaded hole, the positive pressure pipe is communicated with the positive pressure cavity through the positive pressure quick joint; the negative pressure pipe is communicated with the negative pressure cavity through the negative pressure quick joint.
[0052] When the device provided in this embodiment is in use, first of all, the assembly and connection of the provided device are completed at a reduced cost, and the positive pressure pipe is disconnected from the anti-seepage cover; then the position of the annular pressure plate is adjusted according to the depth of the drainage part , and lock it, so that the puncture end of the drainage tube can be quickly and accurately placed in the drainage site. After the annular pressure plate is placed in contact with the skin, push the anti-seepage cover to slide along the drainage tube and touch the skin outside the affected area. At this time, the openings of the positive pressure cavity and the negative pressure cavity are blocked by the skin; such as Figure 8 As shown, then open the stop valve, so that the high-pressure gas in the lower control chamber is slowly discharged to the outside. During this process, as shown in Figure 11 As shown in the figure, since the high-pressure gas of the push piston in the lower control chamber compressing the negative pressure top spring is discharged to the outside, the compressed negative pressure top spring will slowly recover due to the slow loss of the pushing force, so that it is presumed that the piston moves slowly downward. During the process, the upper control chamber will suck the air in the negative pressure chamber to generate negative pressure, so that the anti-seepage cover is sucked and fixed on the patient's skin 6, then close the stop valve, connect the positive pressure tube to the anti-seepage cover, and open the stop. The flow valve makes the positive pressure chamber communicate with the lower control chamber, and the residual high-pressure gas in the lower control chamber will enter the positive pressure chamber and increase the pressure value in the positive pressure chamber. Together, the drainage tube on the patient's skin is inserted into the hole to block, so that the high-pressure gas in the positive pressure chamber will squeeze the transposition platen to make it closely contact with the skin, and because the annular pressure plate is positively pressurized The high-pressure gas in the cavity presses against the skin, so that when the skin in the positive pressure cavity expands or contracts as the patient breathes, the annular pressure plate will still be driven by the high-pressure gas to touch the skin, enhancing drainage. the fixing strength of the tube; such as Figure 9 As shown in the figure, when the drainage tube is pulled due to the external force of the patient's activity, and the annular pressure plate in the positive pressure cavity is separated from the skin, the pressure in the positive pressure cavity is stronger than the external pressure, which will compress the drainage tube into the hole and avoid drainage. The liquid at the drainage tube flows out from the gap between the drainage tube and the insertion hole of the drainage tube.
[0053] Compared with the existing drainage tube fixing method, the drainage tube of this embodiment uses air pressure to press and fix the drainage tube on the skin through the anti-seepage cover that is adsorbed on the skin. When the skin in the positive pressure cavity expands with the patient's breathing Or shrinking, the high pressure in the positive pressure cavity will still press the annular pressure plate on the drainage tube to touch the skin, so that the annular pressure plate can adapt to the expansion and contraction of the patient's skin, thereby enhancing the fixing strength of the drainage tube. The drainage tube will not fall off, which effectively solves the problem that the existing drainage tube is easily detached when fixed with adhesive tape; and because the anti-seepage cover is adsorbed on the skin by the negative pressure generated by the sliding of the piston driven by the active negative pressure top spring, This not only reduces the contact area between the impermeable cover and the skin on the premise of ensuring the fixing strength, but also effectively solves the problem that when the existing drainage tube is fixed with a bandage, the bandage wraps around the limb and compresses the blood vessel and hinders the normal circulation of blood in the limb. In the adsorption state, the positive pressure chamber is ensured to be in a sealed state, so as to prevent gas leakage in the positive pressure chamber, and further improve the fixing stability of the drainage tube.
