Drip chamber for cerebrovascular catheter surgery and the like

Abstract

To provide a drip chamber for cerebrovascular catheter surgery that allows visual confirmation of a stop in drug-solution perfusion, thereby solving the problem in which a water-sealing method, in which a pressure bag is used to press the entire infusion bag for not allowing air to enter the drip chamber thereby filling it with a drug solution and performing perfusion, increases the risk of thrombosis because surgery may continue without recognizing that the perfusion of the drug solution has stopped or ended.SOLUTION: By fluid pressure from continuous perfusion of the drug solution passing through the drip chamber, a structure set inside the drip chamber moves, and when perfusion stops, movement of the structure stops, which is visually recognizable from outside.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] In catheter-based cerebral vascular occlusion, a catheter is inserted into a blood vessel at the base of the leg. Under fluoroscopic imaging using X-rays and contrast media, the catheter is advanced to the target vessel and occluded, primarily using a metal coil. After occlusion, occlusion of the target vessel and maintenance of cerebral blood flow beyond the occluded vessel are confirmed by imaging of an unoccluded vessel, and then the catheter is removed. One of the complications of this treatment is vascular thrombus blockage. The metal coils and catheters inserted to treat the lesion are foreign bodies to the human body, and blood may adhere to their surface, forming a thrombus, or a thrombus originally attached to the vessel wall may be dislodged by the catheter, resulting in air embolism, leading to vascular occlusion. The reported incidence of this complication ranges from 2% to 77%, with a risk of subsequent neurological impairment and death of up to 8.4%. To prevent this complication, a medicinal solution consisting of saline and heparin is perfused through a catheter bypass during surgery to prevent blood clotting. In this surgery, in order to minimize the risk of air embolism, it is common practice to fill the drip tube between the IV bag and the bypass with the drug solution and infuse it without letting any air in (hereafter referred to as the "watertight method"). Unlike peripheral intravenous drip, the risk of irreversible damage occurs with drip infusion during cerebrovascular catheterization, even if there is less than 1 ml of air. However, the watertight method increases the risk of thrombosis by continuing surgery without knowing when the drug infusion will stop or end. In peripheral intravenous drip infusion, the drip bag is elevated above the body and the drug solution is delivered by gravity. However, in cerebrovascular catheter surgery, the pressure from gravity alone is not enough to overcome the arterial pressure, so a pressure bag is used to compress the entire drip bag and force the drug solution into the artery. The drip tube used in the watertight method is not special, but is the same as the drip tube used in peripheral intravenous drip infusion.

[0003] Prior art describes an IV drip tube with an alarm, in which a metal-covered spherical float is placed inside the drip tube, and when the medicinal solution runs out, the spherical float descends and contacts a bracket-shaped receptacle at the bottom inside the drip tube, and electricity connected to one side of the receptacle flows through the spherical float to the other receptacle, activating an alarm to notify the user (Patent Document 1). However, this cannot detect when the medicinal solution perfusion has stopped for reasons other than the end of the medicinal solution, and it does not detect fluid pressure. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Unexamined Utility Model No. 63-29537 Summary of the Invention [Problem to be solved by the invention]

[0005] The problem to be solved is the increased risk of thrombosis caused by continuing surgery without knowing when the perfusion of the drug solution has stopped or ended using the watertight method. [Means for solving the problem]

[0006] The present invention Use in a watertight manner The structure to be set inside the drip tube moves due to the fluid pressure of the continuous perfusion of the drug solution passing through the drip tube, and when the perfusion stops, the movement of the structure stops, which can be visually observed from the outside. Furthermore, when the structure moves, it does not block the fluid outlet and interfere with the continuous perfusion. It is characterized by: [Effects of the Invention]

[0007] Because the structure to be set inside the drip tube of the present invention has this characteristic, it is possible to visually confirm the cessation of perfusion of the medicinal solution, thereby reducing the risk of thrombosis. [Brief explanation of the drawings]

[0008] [Figure 1] Conceptual diagram of a drip tube with a structure set inside, which is a windsock member that sways under fluid pressure according to the present invention. [Figure 2] Conceptual diagram of a drip tube with a structure set inside, which is a windsock member that sinks under the influence of fluid pressure according to the present invention. [Figure 3] Conceptual diagram of a drip tube with a structure set inside, which is a windsock member that sinks and rotates under the influence of fluid pressure according to the present invention. [Figure 4] Conceptual diagram of a drip tube with a structure set inside, which is a windsock member that rotates under fluid pressure according to the present invention. [Figure 5] A bottom view of the rotating windsock member 104 of FIG. [Figure 6] Conceptual diagram of a drip tube with a structure set inside, which is a windsock member that sinks under the influence of fluid pressure according to the present invention. [Figure 7] Conceptual diagram of a drip tube with a plate-shaped valve opening / closing member structure set inside, which opens the valve when subjected to fluid pressure according to the present invention. [Figure 8] Conceptual diagram of a drip tube with a structure set inside, which is a membrane valve opening / closing member that opens a valve when subjected to fluid pressure according to the present invention. [Figure 9] Conceptual diagram of a drip tube with a waterwheel-type structure set inside that rotates on its axis under fluid pressure according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] We have created a structure to be set inside the drip tube that allows visual confirmation of the cessation of drug solution perfusion in a watertight manner, reducing the risk of thrombosis. Claim 1 to claim 2 The term "watertight" used in the above means that the drip tube is filled with a medicinal solution and perfused without allowing air to enter, but it goes without saying that this is not limited to cerebrovascular catheter surgery. [Example]

[0010] 1 to 6 show the structure of the present invention. Claim 1 1 is a conceptual diagram of a dripping tube with a structure set inside, which is a windsock member of the present invention that sways when subjected to fluid pressure. FIG. 2 is a conceptual diagram of a dripping tube with a structure set inside, which is a windsock member of the present invention that sinks when subjected to fluid pressure. FIG. 3 is a conceptual diagram of a dripping tube with a structure set inside, which is a windsock member of the present invention that sinks and rotates when subjected to fluid pressure. FIG. 4 is a conceptual diagram of a dripping tube with a structure set inside, which is a windsock member of the present invention that rotates when subjected to fluid pressure. FIG. 5 is a bottom view of the rotating windsock member 104 of FIG. 4. FIG. 6 is a conceptual diagram of a dripping tube with a structure set inside, which is a windsock member of the present invention that sinks when subjected to fluid pressure.

[0011] The structure set in drip tube 1 used in the watertight construction of Figure 1 in the embodiment of the present invention is windsock member 101, which sways due to the fluid pressure of the continuous perfusion of chemical solution passing through drip tube 1. In this embodiment, strip-shaped windsock member 101, which has a specific gravity greater than that of the chemical solution, is suspended from above. Windsock member 101 sways due to the fluid pressure flowing from chemical solution inlet 2 to chemical solution outlet 3, and the swaying of windsock member 101 stops when the perfusion stops. This movement is visible from the outside, so the cessation of the perfusion of chemical solution can be visually confirmed.

[0012] The structure set in the drip tube 4 used in the watertight construction of Figure 2 in this embodiment of the present invention is a windsock member 102 that sinks under the fluid pressure of the continuous perfusion of the chemical solution passing through the drip tube 4. In this embodiment, the spherical windsock member 102, which has a lighter specific gravity than the chemical solution, is in a floating shape. The dome-shaped top of the drip tube 4 applies fluid pressure to the entire windsock member 102. The windsock member 102 sinks under the fluid pressure flowing from the chemical solution inlet 2 to the chemical solution outlet 3, and floats up again when the perfusion stops. This movement is visible from the outside, so the cessation of the chemical solution perfusion can be visually confirmed.

[0013] The structure set in the drip tube 4 used in the watertight construction of Figure 3 of the present invention is a streamer 103 that sinks and rotates under the fluid pressure of the continuous perfusion of the chemical solution passing through the drip tube 4. In this embodiment, the streamer 103 is a floating sphere with a lighter specific gravity than the chemical solution and a plate-like protrusion with an even lighter specific gravity. The dome-shaped top of the drip tube 4 applies fluid pressure to the entire streamer 103. The streamer 103 sinks under the fluid pressure flowing from the chemical solution inlet 2 to the chemical solution outlet 3, and floats again when the perfusion stops. The plate-like protrusion is at the top when the perfusion is stopped and moves downward under fluid pressure, causing the sphere to rotate. This movement is visible from the outside, allowing visual confirmation that the chemical solution perfusion has stopped.

[0014] The structure set in drip tube 1 used in the watertight construction of the embodiment of the present invention shown in Figure 4 is windsock member 104, which rotates under the fluid pressure of the continuous perfusion of the medicinal solution passing through drip tube 1. Windsock member 104 is made of polypropylene, which has a lighter specific gravity than the medicinal solution, and is made by cutting the bottom of the cylinder into four parts and bending it diagonally inward to form blade-like portions 105. Windsock member 104 rotates when the fluid pressure flowing from medicinal solution inlet 2 to medicinal solution outlet 3 passes through the inside of the cylinder and pushes down on blade-like portions 105, and stops rotating when the perfusion stops. This movement is visible from the outside, so the cessation of the medicinal solution perfusion can be visually confirmed.

[0015] The structure set in the drip tube 1 used in the watertight construction of Figure 6 of the embodiment of the present invention is a cup-shaped streamer member 106 that sinks under the fluid pressure of the continuous perfusion of medicinal solution passing through the drip tube 1. A flexible pole member 108 is circumscribed around the cup-shaped portion of the streamer member 106, and the pole member 108 is joined to a weight member 107. The weight member 107 is donut-shaped, with the medicinal solution passing through the central space. The streamer member 106, placed at the bottom of the drip tube 1, sinks as the fluid pressure flowing from the medicinal solution inlet 2 to the medicinal solution outlet 3 pushes down on the cup-shaped portion, causing it to sink. When the perfusion stops, the flexibility of the pole member 108 causes it to return to its original position. This movement is visible from the outside, allowing visual confirmation that the medicinal solution has stopped perfusion. [Example]

[0016] Figures 7 and 8 show examples of the present invention. Figure 7 is a conceptual diagram of a dripping tube with a structure set inside, which is a plate-shaped valve-opening / closing member of the present invention whose valve opens when subjected to fluid pressure. Figure 8 is a conceptual diagram of a dripping tube with a structure set inside, which is a membrane-shaped valve-opening / closing member of the present invention whose valve opens when subjected to fluid pressure.

[0017] The structure set in the drip tube 1 used in the watertight construction of Figure 7 of the embodiment of the present invention is a plate-shaped valve-opening / closing member 201 whose valve opens in response to the fluid pressure of the continuous perfusion of medicinal liquid passing through the drip tube 1 and closes when the perfusion stops. The valve of the plate-shaped valve-opening / closing member 201 opens in response to the fluid pressure flowing from the medicinal liquid inlet 2 to the medicinal liquid outlet 3 and closes when the perfusion stops. This movement can be seen from the outside, so the cessation of the medicinal liquid perfusion can be visually confirmed.

[0018] The structure set in the drip tube 1 used in the watertight construction of Figure 8 of the embodiment of the present invention is a membranous valve-opening / closing member 202 whose valve opens in response to the fluid pressure of the continuous perfusion of medicinal liquid passing through the drip tube 1 and closes when the perfusion stops. The membranous valve-opening / closing member 202 opens in response to the fluid pressure flowing from the medicinal liquid inlet 2 to the medicinal liquid outlet 3 and closes when the perfusion stops. This movement can be seen from the outside, so the cessation of the medicinal liquid perfusion can be visually confirmed. [Example]

[0019] FIG. 9 shows the present invention Claim 2 9 is a conceptual diagram of a drip tube in which a structure, which is a waterwheel-type member that rotates on its axis under fluid pressure according to the present invention, is set.

[0020] The structure set in the drip tube 1 used in the watertight construction of the embodiment of the present invention shown in FIG. 9 is subjected to the fluid pressure of the continuous perfusion of the drug solution passing through the drip tube 1. , the axis is approximately parallel to the direction of flowThe rotating waterwheel-shaped member 301 rotates due to the fluid pressure flowing from the chemical solution inlet 2 to the chemical solution outlet 3, and stops rotating when the perfusion stops. This movement can be seen from the outside, so it is possible to visually confirm that the chemical solution perfusion has stopped. In the conceptual diagram, the waterwheel-shaped member 301 is depicted as floating in the water, but in reality it is fixed to the top or side of the drip tube 1, or placed on the bottom of the drip tube 1.

[0021] The above is from claim 1 Claim 2 This is the main configuration of the structure to be set in the drip tube described above. [Industrial Applicability]

[0022] The drip tube of the present invention and the structure set therein are particularly useful for the watertight drip infusion of a medicinal solution consisting of physiological saline and heparin in cerebrovascular catheter surgery. [Explanation of symbols]

[0023] 1 Drop tube 2. Chemical inlet 3 Chemical outlet 4 Drop tube 101 Windsock material 102 Spherical windsock member 103 A windsock made of a ball with a lighter specific gravity than the ball and a plate-like protrusion attached 104 Rotating windsock member 105 Feather 106 Cup-shaped windsock member 107 Weight section 108 Pole section 201 Plate-shaped valve opening and closing member 202 Membrane valve opening and closing member 301 Water wheel type member

Claims

1. A structure to be set inside a dripping tube, which is used in a watertight manner, characterized in that the structure set inside the dripping tube moves due to the fluid pressure of the continuous perfusion of a medicinal solution passing through the dripping tube, and the movement of the structure stops when the perfusion stops, which can be seen from the outside.

2. 2. The structure of claim 1, wherein the structure is a windsock member that sways, sinks, or rotates under fluid pressure.

3. 2. The structure of claim 1, wherein the structure is a valve-opening member that opens when subjected to fluid pressure and closes when perfusion stops.

4. 2. The structure of claim 1, wherein the structure is a waterwheel-type member that rotates around its axis under fluid pressure.

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