JPH0352521Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention is applicable to blood circuits of artificial kidneys, fluid guide tubes of infusion blood transfusion sets, fluid guide tubes connected by Luer locks, and other adapters that can be attached to medical equipment. This is about the cap.

[Prior Art] Extracorporeal blood circulation circuits are known that draw blood from a patient, purify it with an artificial kidney, and then return it to the patient.

FIG. 6 shows an example of a venous blood circuit that constitutes a part of the extracorporeal blood circulation circuit. Accessories such as a drip chamber 31 and a co-injection part 32 are attached to the blood tube 30, and a joint 33 for connecting to a connecting tube of an artificial kidney is attached to the rear end of the blood tube 30. ing. A shunt adapter 34 is attached to the distal end of the blood tube 30, and a shunt is connected to the shunt adapter 34 so that the shunt is inserted into the patient's vein. Although not shown, a similar shunt adapter is also attached to the end of the arterial blood circuit connected to the patient's artery.

Such an extracorporeal blood circulation circuit is connected to an artificial kidney and assembled into a monitoring device equipped with a blood pump, and then physiological saline is introduced into the circuit.
While rotating the blood pump, physiological saline is circulated throughout the blood circuit to remove foreign matter and air remaining inside the blood tube and accessories. In this case, air and foreign matter such as blood tubes connected upstream of the drip chamber 31 are removed by the filter and air vent tube provided in the drip chamber 31, but the drip chamber 31 Foreign matter and air in the blood tube connected downstream of the yam bar 31 must be removed through the shunt adapter 34.

However, this shunt adapter 34 is equipped with a protective cap 3 for the purpose of preventing contamination during the manufacturing process.
5 is attached, and this protective cap 35 is attached to prevent the shunt adapter 34 from coming into direct contact with nearby instruments, devices, etc. even during priming.

Conventionally, the protective cap 35 includes, for example, a fourth
The one shown in Fig. 5 is known. FIG. 4 shows a lid 37 having a convex portion on the tapered cylinder 36.
Fig. 5 shows that an inner surface rib 39 is formed on the inner circumferential surface of the straight tubular body 38, and when the cover 40 is placed on the top, the rib 39 is formed on the outer circumferential surface of the tip of the cylindrical body 38. It is designed to be pressed into contact. The covers 37, 40 of these protective caps 35 are
After completing priming, it is opened to drain the waste fluid (saline after washing) in the blood circuit.

[Problem to be solved by the invention] However, in the protective cap shown in Fig. 4, the convex part is press-fitted into the mouth of the cylinder, so although the mouth of the cylinder is tightly sealed, there is no air permeability. There's a problem. Without this air permeability, during the above-mentioned priming, especially when physiological saline is flowed into the blood tube downstream of the drip chamber 31, there is no way for the air present in the blood tube to escape. There is a problem in that the saline solution does not flow to the tip of the blood tube, making it impossible to wash the tip of the tube sufficiently. On the other hand, since the protective cap shown in FIG. 5 has ribs 39 formed on the inner surface of the cover, a gap is created between the inner surface of the cover and the outer surface of the cylindrical body 38, and this gap ensures ventilation. However, since the outer surface of the cylindrical body 38 is pressed by the ribs 39, the shape of the cylindrical mouth part is distorted, and the cover 40
There is a problem in that the tube loosens and separates from the cylinder 38 during product transportation. In addition, one method for priming is to remove the cover 40, insert the shunt adapter of the arterial blood circuit into the distal opening of the cylinder 38, configure the entire extracorporeal blood circulation circuit into a loop, and pour in multiple physiological saline solutions. There is a way to recirculate the
When this method is carried out, there is also the problem that if the cylindrical mouth part is out of shape, the shunt adapter of the arterial blood circuit cannot be connected smoothly.

Such problems apply not only to protective caps of shunt adapters in blood circuits, but also to adapter caps of fluid guide tubes in other medical devices.

The present invention solves the above-mentioned problems, allows the air in the liquid guide tube to escape through the protective cap when the protective cap is attached to the adapter of the liquid guide tube, and maintains the protection cap for a long period of time. The purpose is to prevent the mouth from deforming.

[Means for Solving the Problems] The means of the present invention adopted to solve the above problems is a cap of an adapter provided at the tip of a liquid guiding tube of a medical device, the cap being attached to the tip of the adapter. a cylindrical body, and a cover that is placed over the upper end of the cylindrical body; ribs are formed on the inner surface of the upper surface of the cover and on the inner circumferential surface of the cover; When the end opening is covered, a gap is formed between the upper end opening of the cylinder and the inner surface of the cover, and the inner surface of the upper surface of the cover is fitted into the upper opening of the cylinder The present invention is characterized in that a convex portion is formed, and a ventilation groove is formed in the convex portion to communicate the inside of the cylindrical body and the gap portion.

[Operation] When the cover is placed over the top end of the cylinder, the convex portion formed on the inner surface of the top surface of the cover fits into the cylinder mouth, and the ribs on the inner peripheral surface of the cover fit into the outer peripheral surface of the top end of the cylinder. comes into contact with. Further, the rib on the inner surface of the upper surface of the cover comes into contact with the mouth end surface of the upper end mouth of the cylinder. Therefore, a gap is formed between the upper end of the cylinder and the inner surface of the cover. Moreover, since the cover protrusion is fitted into the inside of the cylinder mouth, the cylinder mouth is prevented from deforming due to the pressing force of the inner circumferential rib of the cover, and the cover is securely fixed to the cylinder mouth. . Furthermore, when performing priming, for example, the air at the tip of the liquid guide tube escapes into the gap between the inner surface of the cover and the air through the ventilation groove formed in the convex part of the cover, allowing the cleaning liquid in the liquid guide tube to reach the tip of the cap. can be reached.

[Example] Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 3.

FIG. 1 is a sectional view of a protective cap of a shunt adapter showing an embodiment of the present invention. 1 is a cylinder, 2
is a cover that is removably attached to the upper end opening 3 of the cylinder, and these cylinders 1 and cover 2 are connected to the connecting band 4.
are connected by

As shown in FIGS. 2 and 3, the cover 2 has a cylindrical shape with a closed upper surface portion 5, and a cross-shaped upper surface rib 5a is formed in the radial direction on the inner surface of the upper surface portion 5. There is. Furthermore, side ribs 8 are formed in the cover height direction at positions corresponding to the upper surface ribs 5a on the inner circumferential surface of the cover. Furthermore, the cover upper surface part 5
A convex portion 6 that fits the upper end opening 3 of the cylindrical body 1 is formed at the center of the inner surface of the tube. This convex portion 6 is composed of four protrusions 6a formed higher than the upper surface rib 5a, and each protrusion 6a, 6a
The space serves as a ventilation groove 7. This ventilation groove 7
Needless to say, it is configured to communicate with the inside of the cylindrical body 1.

The convex portion 6 may have any cross-sectional shape as long as it can prevent the upper end portion 3 from deforming when inserted into the upper end portion of the cylindrical body 1 and ensure air permeability.

When the cover 2 is placed over the upper end opening 3 of the cylinder, the cover protrusion 6 fits into the upper opening 3 of the cylinder, and the cover side rib 8 comes into contact with the outer peripheral surface of the upper opening 3 of the cylinder. Further, the cover upper surface rib 5a abuts against the mouth end surface of the upper end mouth portion 3 of the cylinder body. Therefore, a gap corresponding to the height of the ribs 5a and 8 is formed between the upper end opening 3 of the cylinder and the inner surface of the cover. The ventilation groove 7 formed in the cover convex portion 6 communicates the inside of the cylindrical body 1 with this gap.

The above-mentioned protective cap is removably attached to the shunt adapter 34 (see FIG. 6) at the lower end 9 of the cylinder with the cover 2 covering the upper end 3 of the cylinder. This protective cap is also attached to the shunt adapter 34 during priming, which is performed as a pretreatment before starting treatment. Priming is a process in which physiological saline, which is a cleaning fluid, is introduced into the extracorporeal blood circulation circuit, and the physiological saline is circulated by a blood pump to remove foreign matter and air within the blood circulation circuit. In this case, physiological saline also flows into the blood tube 30 of the venous circuit shown in FIG. 6, for example, and also flows into the blood tube on the downstream side through the drip chamber 31. The air pushed out by the physiological saline passes through the ventilation groove 7 of the cover protrusion 6 and escapes to the outside air from the gap formed between the inner surface of the cover and the upper end opening 3 of the cylinder body. Therefore, the physiological saline flowing downstream of the drip chamber 31 smoothly reaches the tip of the blood tube, that is, the shunt adapter 34, and the priming from the drip chamber 31 to the shunt adapter 34 is sufficiently performed. be exposed.

Note that after priming is completed, the above-mentioned protective cap is removed from the shunt adapter 34, and a shunt is connected to the shunt adapter 34.

The above explanation has been given using the blood circuit of an artificial kidney as an example, but the present invention is applicable to a fluid guide tube of a blood transfusion set, which has a similar purpose, shape, and structure.
It can also be applied to medical devices such as liquid guide tubes connected by Luer locks.

[Effects of the invention] According to the invention described above, since the convex portion on the inner surface of the upper surface of the cover fits into the upper end opening of the cylinder,
The shape of the upper end of the cylindrical body does not deform, and the cover does not come off during transportation. In addition, when connecting the shunt adapter at the other end of the blood extracorporeal circulation circuit to the upper end of the cylinder, for example, the shunt adapter at the other end can be connected smoothly because the upper end of the cylinder does not lose its shape. Can be plugged in.

Furthermore, when performing priming, etc., the air contained in the tube is pushed out by the physiological saline introduced into the liquid guide tube, and passes through the ventilation groove formed in the cover convex portion to the upper end opening of the cylinder body. It will escape to the outside through the gap between the part and the inner surface of the cover. Therefore, the physiological saline reaches the inside of the tip of the adapter provided in the liquid guide tube, and the inside of the tip of the adapter can be sufficiently cleaned and vented.

[Brief explanation of the drawing]

Fig. 1 is a half-sectional view showing an embodiment of the present invention;
The figure is a plan view of the cover, Figure 3 is a sectional view taken along line A-B in Figure 2, Figure 4 is a partially cutaway front view of a conventional shunt adapter protective cap, and Figure 5 is a similar conventional shunt adapter protective cap. FIG. 6 is a perspective view showing another example of the vent adapter protective cap, and is a schematic diagram of the venous side circuit of a general artificial kidney. DESCRIPTION OF SYMBOLS 1... Cylindrical body, 2... Cover, 3... Cylindrical upper end opening part, 5... Cover upper surface part, 5a... Cover upper surface rib, 6... Cover convex part, 7... Ventilation groove, 8...... Cover side ribs.

Claims (1)

[Scope of Claim for Utility Model Registration] A cap for an adapter provided at the tip of a liquid guiding tube of a medical device, comprising a cylindrical body attached to the tip of the adapter, and a cap on the upper end of the cylindrical body. a cover formed with ribs on the inner surface of the upper surface of the cover and the inner circumferential surface of the cover, and in a state where the cover is placed over the upper end mouth of the cylinder, the upper end mouth of the cylinder A gap is formed between the inner surface of the cover, and a convex portion is formed on the inner surface of the upper surface of the cover to fit into the upper end opening of the cylindrical body, and the convex portion is provided with a gap between the cylindrical body and the gap. An adapter cap for a medical device, characterized by forming a ventilation groove that communicates between the parts.