Drip chamber for cerebrovascular catheter surgery etc.

Abstract

In cerebrovascular catheter surgery, in the watertight method of compressing the entire drip bag with a pressure back to prevent air from entering the drip chamber and filling and perfusing the chemical solution, the risk of thrombosis increases by continuing the operation without knowing the stop or end of the perfusion of the chemical solution. Therefore, a drip chamber that enables visual confirmation of the stop of the perfusion of the chemical solution is provided. 【Solution means】Due to the fluid pressure of the continuous perfusion of the chemical solution passing through the drip chamber, the structure set inside the drip chamber moves, and it is visually observable from the outside that the movement of the structure stops when the perfusion stops.

Description

Technical Field

[0001] The present invention relates to a drip cylinder used in cerebrovascular catheter surgery and the like.

Background Art

[0002] In cerebrovascular occlusion surgery using a catheter, the catheter is inserted into a blood vessel from the groin, advanced close to the blood vessel to be occluded while performing fluoroscopy using an X-ray and a contrast agent, and the blood vessel is occluded mainly using a metal coil. After occlusion, after confirming by imaging from non-occluded blood vessels that the target blood vessel is occluded and blood flow to the brain beyond the occluded blood vessel is ensured, the catheter is removed. One of the complications of this treatment method is that the blood vessel may be blocked by a thrombus. The metal coils and catheters inserted to treat the lesion are foreign substances to the human body, and blood may adhere to their surfaces to form thrombi, or thrombi originally attached to the blood vessel wall may be peeled off by the catheter, or air embolisms may form, resulting in occlusion of the blood vessel. The incidence of this complication has been reported to be 2% - 77%, and the probability of subsequent neurological disorders and death is as high as 8.4%. In order to prevent this complication from occurring, during the operation, a chemical solution composed of physiological saline and heparin is perfused from the bypass of the catheter to prevent the blood from clotting. In this operation, in order to minimize the risk of air embolism, it is generally practiced to fill the drip cylinder between the drip bag and the bypass with the chemical solution without introducing air (hereinafter, this is referred to as the "watertight method"). This is because, unlike peripheral intravenous drip, in the drip in cerebrovascular catheter surgery, even a small amount of air less than 1 ml has a high risk of causing irreparable sequelae. However, the watertight method increases the risk of thrombosis by continuing the operation without knowing the stop or end of the perfusion of the chemical solution. In peripheral intravenous drip, the drip bag is raised higher than the body and the chemical solution flows due to the gravity difference. On the other hand, in the drip in cerebrovascular catheter surgery, since the pressure of the gravity difference is overcome by the arterial pressure, the entire drip bag is compressed with a pressure bag to force the chemical solution to flow into the artery. The drip chamber used in the watertight method is not special and is the same as the drip chamber used in peripheral intravenous drip infusion.

[0003] In the prior art, a spherical float covered with metal is placed inside the drip chamber. When the medicinal solution runs out, the spherical float descends and contacts the arc-shaped receiving fitting at the inner bottom of the drip chamber, and the electricity that passes through one of the receiving fittings is transmitted through the spherical float to the other receiving fitting, activating an alarm to notify. There is a description of a drip chamber with an alarm device (Patent Document 1). However, this cannot detect when there is a stop in the perfusion of the medicinal solution other than when the medicinal solution has ended, nor does it detect fluid pressure.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The problem to be solved is that the risk of thrombosis increases by continuing the operation without knowing the stop or end of the perfusion of the medicinal solution by the watertight method.

Means for Solving the Problems

[0006] The structure to be set inside the drip chamber of the present invention is such that, due to the fluid pressure of the continuous perfusion of the medicinal solution passing through the drip chamber, the structure set inside the drip chamber moves, and it is visually observable from the outside that the movement of the structure stops when the perfusion stops. Used in a watertight manner and, when the structure moves, does not block the fluid outlet and interfere with the continuous perfusion This is the gist.

Effects of the Invention

[0007] Since the structure to be set inside the drip chamber of the present invention has this feature, it is possible to visually confirm the stop of the perfusion of the medicinal solution and reduce the risk of occurrence of thrombosis.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Mode for Carrying Out the Invention

[0009] A structure to be set inside a dropping cylinder has been realized, which can visually confirm the stop of the perfusion of a chemical solution in a watertight method and can reduce the risk of thrombosis. Claim 1 from claim 2 The “watertight” described in Claim 1 means filling and perfusing a chemical solution without letting air into the dropping cylinder, but it goes without saying that it is not limited to cerebrovascular catheter surgery.

Examples

[0010] Figures 1 to 6 are of the present inventionClaim 1 This is an embodiment. FIG. 1 is a conceptual diagram of a dropping cylinder with a structure that is a blowing member swaying under fluid pressure of the present invention set inside. FIG. 2 is a conceptual diagram of a dropping cylinder with a structure that is a blowing member sinking under fluid pressure of the present invention set inside. FIG. 3 is a conceptual diagram of a dropping cylinder with a structure that is a blowing member sinking and rotating under fluid pressure of the present invention set inside. FIG. 4 is a conceptual diagram of a dropping cylinder with a structure that is a blowing member rotating under fluid pressure of the present invention set inside. FIG. 5 is a bottom view of the rotating blowing member 104 in FIG. 4. FIG. 6 is a conceptual diagram of a dropping cylinder with a structure that is a blowing member sinking under fluid pressure of the present invention set inside.

[0011] The structure set in the watertight dropping cylinder 1 in FIG. 1 of the embodiment of the present invention is a blowing member 101 that sways under the fluid pressure of the continuous perfusion of the chemical solution passing through the dropping cylinder 1. In this embodiment, the belt-shaped blowing member 101 with a specific gravity heavier than that of the chemical solution is suspended from above. The blowing member 101 sways due to the fluid pressure flowing from the chemical solution inlet 2 to the chemical solution outlet 3, and the swaying of the blowing member 101 stops when the perfusion stops. Since this movement is visible from the outside, it is possible to visually confirm the stop of the perfusion of the chemical solution.

[0012] The structure set in the watertight dropping cylinder 4 in FIG. 2 of the embodiment of the present invention is a blowing member 102 that sinks under the fluid pressure of the continuous perfusion of the chemical solution passing through the dropping cylinder 4. In this embodiment, the spherical blowing member 102 with a specific gravity lighter than that of the chemical solution is in a floating state. Due to the upper part of the dropping cylinder 4 being dome-shaped, fluid pressure is applied to the entire blowing member 102. The blowing member 102 sinks due to the fluid pressure flowing from the chemical solution inlet 2 to the chemical solution outlet 3, and the blowing member 102 floats up again when the perfusion stops. Since this movement is visible from the outside, it is possible to visually confirm the stop of the perfusion of the chemical solution.

[0013] The structure set on the dripping cylinder 4 used in a watertight manner in FIG. 3 of the embodiment of the present invention is a blowing member 103 that sinks and rotates under the fluid pressure of the continuous perfusion of the chemical solution passing through the dripping cylinder 4. In this embodiment, the blowing member 103, which is a ball lighter in specific gravity than the chemical solution and has a plate-like protrusion lighter in specific gravity than the ball, is in a floating state. Since the upper part of the dripping cylinder 4 is dome-shaped, fluid pressure is applied to the entire blowing member 103. The blowing member 103 sinks due to the fluid pressure flowing from the chemical solution inlet 2 to the chemical solution outlet 3, and when the perfusion stops, the blowing member 103 floats up again. The plate-like protrusion is at the upper part when the perfusion has stopped, and moves to the lower part under the fluid pressure, so the ball rotates. Since this movement can be visually observed from the outside, it is possible to visually confirm the stop of the perfusion of the chemical solution.

[0014] The structure set on the dripping cylinder 1 used in a watertight manner in FIG. 4 of the embodiment of the present invention is a blowing member 104 that rotates under the fluid pressure of the continuous perfusion of the chemical solution passing through the dripping cylinder 1. The blowing member 104 is made of polypropylene, which is lighter in specific gravity than the chemical solution, and has been cut so as to divide the lower part of the cylinder into four parts and bent obliquely inward to form blade-like parts 105. The blowing member 104 rotates when the fluid pressure flowing from the chemical solution inlet 2 to the chemical solution outlet 3 pushes down the blade-like parts 105 through the inside of the cylinder, and the rotation stops when the perfusion stops. Since this movement can be visually observed from the outside, it is possible to visually confirm the stop of the perfusion of the chemical solution.

[0015] The structure set on the dripping cylinder 1 used in a watertight manner in FIG. 6 of the embodiment of the present invention is a cup-shaped blowing member 106 that sinks under the fluid pressure of the continuous perfusion of the chemical solution passing through the dripping cylinder 1. A flexible pole part 108 is circumscribed around the cup-shaped part of the blowing member 106, and the pole part 108 is joined to the weight part 107. The weight part 107 is donut-shaped and the chemical solution passes through the central space. The blowing member 106 placed on the bottom of the dripping cylinder 1 sinks when the fluid pressure flowing from the chemical solution inlet 2 to the chemical solution outlet 3 pushes down the cup-shaped part, and returns to its original state due to the flexibility of the pole part 108 when the perfusion stops. Since this movement can be visually observed from the outside, it is possible to visually confirm the stop of the perfusion of the chemical solution.

Example

[0016] Figures 7 to 8 are examples of the present invention. Figure 7 is a conceptual diagram of a dropping cylinder with a structure inside that is a plate-like valve opening and closing member where the valve opens under the fluid pressure of the present invention. Figure 8 is a conceptual diagram of a dropping cylinder with a structure inside that is a membrane-like valve opening and closing member where the valve opens under the fluid pressure of the present invention.

[0017] The structure set in the watertight dropping cylinder 1 in Figure 7 of the example of the present invention is a plate-like valve opening and closing member 201 that opens when receiving the fluid pressure of the continuous perfusion of the chemical solution passing through the dropping cylinder 1 and closes when the perfusion stops. The plate-like valve opening and closing member 201 opens due to the fluid pressure flowing from the chemical solution inlet 2 to the chemical solution outlet 3 and closes when the perfusion stops. Since this movement is visible from the outside, it is possible to visually confirm the stop of the perfusion of the chemical solution.

[0018] The structure set in the watertight dropping cylinder 1 in Figure 8 of the example of the present invention is a membrane-like valve opening and closing member 202 that opens when receiving the fluid pressure of the continuous perfusion of the chemical solution passing through the dropping cylinder 1 and closes when the perfusion stops. The membrane-like valve opening and closing member 202 opens due to the fluid pressure flowing from the chemical solution inlet 2 to the chemical solution outlet 3 and closes when the perfusion stops. Since this movement is visible from the outside, it is possible to visually confirm the stop of the perfusion of the chemical solution.

Example

[0019] Figure 9 is an example of the present invention Claim 2 wherein. Figure 9 is a conceptual diagram of a dropping cylinder with a structure inside that is a waterwheel-type member that rotates about an axis under the fluid pressure of the present invention.

[0020] The structure set in the watertight dropping cylinder 1 in Figure 9 of the example of the present invention receives the fluid pressure of the continuous perfusion of the chemical solution passing through the dropping cylinder 1 by an axis substantially parallel to the direction of flowIt is the rotating waterwheel-shaped member 301. The waterwheel-shaped member 301 rotates due to the fluid pressure flowing from the chemical solution inlet 2 to the chemical solution outlet 3, and the rotation stops when the perfusion stops. Since this movement can be visually observed from the outside, it is possible to visually confirm the stop of the perfusion of the chemical solution. In the conceptual diagram, the waterwheel-shaped member 301 is depicted as floating in water, but in reality, it is fixed to the upper part or side part of the dropping cylinder 1, or placed on the bottom of the dropping cylinder 1.

[0021] The above is the main configuration of the structure to be set in the dropping cylinder according to claim 1 to Claim 2 This is the main configuration of the structure to be set in the dropping cylinder described in

Industrial Applicability

[0022] The dropping cylinder of the present invention and the structure set inside it are particularly useful for the application of using the drip of a chemical solution composed of physiological saline and heparin in cerebrovascular catheter surgery by the watertight method.

Explanation of Reference Numerals

[0023] 1 Dropping cylinder 2 Chemical solution inlet 3 Chemical solution outlet 4 Dropping cylinder 101 Blowing member 102 Spherical blowing member 103 Blowing member with a plate-like protrusion having a specific gravity lighter than that of the sphere 104 Rotating blowing member 105 Blade-shaped part 106 Cup-shaped blowing member 107 Weight part 108 Pole part 201 Plate-like valve opening / closing type member 202 Membrane-like valve opening / closing type member 301 Waterwheel-shaped member

Claims

【Claim 1】 In a dropping cylinder used in a watertight manner, due to the fluid pressure of the continuous perfusion of the chemical solution passing through the dropping cylinder, the structure set inside the dropping cylinder moves, and it is externally visible that the movement of the structure stops when the perfusion stops. Also, when the structure moves, without obstructing the continuous perfusion by closing the fluid outlet, the structure is not fixed to the dropping cylinder, and is held above the chemical solution outlet by floating with a specific gravity lighter than the chemical solution, and is a member that sinks or rotates under the influence of fluid pressure. A dropping cylinder with the structure set inside, characterized by the above.

Images