JP2014079361A - Medical drainage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a medical drainage device 1 contributing to prevention of retrograde infection by stopping a part of an effluent from being sucked into a guide tube 6 when the guide tube 6 is evacuated and preventing intrusion of the effluent into the guide tube 6.SOLUTION: An elastic modulus of a second check valve 6a is set smaller than an elastic modulus of a first check valve 5a. After an effluent is discharged by contractingly deforming a pump valve 8 by a gripping operation, the gripping operation applied to the pump valve 8 is released, and when the guide tube 6 is evacuated, the second check valve 6a is closed before the first check valve 5a is opened. This configuration stops a part of the effluent from being sucked into the guide tube 6 when the guide tube 6 is evacuated so as to prevent the intrusion of the effluent into the guide tube 6, thereby contributing to the prevention of the retrograde infection.

Description

  The present invention relates to a medical drainage device that, for example, performs a laparotomy on an affected part of a sick person, and then sucks out and discharges drainage fluid such as pus and exudate through a lead-out tube inserted into the affected part. The present invention relates to a medical drainage device having an elastic pump valve.

The drainage fluid such as blood, pus, exudate, and digestive fluid generated in the affected area after the operation is discharged to the outside using a drain tube or the like for the purpose of removing the cause of bacterial infection or decompressing the affected area.
Among various medical drainage devices developed for this purpose, for example, the medical discharge tool described in Patent Document 1 and the pump tool described in Patent Document 2 are known.
The medical discharge device of Patent Document 1 can selectively use either the suction discharge method or the natural discharge method depending on the situation, and the pump device of Patent Document 2 is provided with a check valve and is made of an elastic material. The liquid discharged from the pump valve is blown out and fed only into the liquid storage bag.

As shown in FIG. 7 (a), these medical discharge devices and pump devices connect a connection tube 60 inserted into an affected area of a sick person to a pump valve 61, and the pump valve 61 is drained via a pipe portion 62. The bag 63 is connected.
A first check valve 60 a made of synthetic resin is provided in the connection tube 60, and a second check valve 62 a made of synthetic resin is provided in the pipe portion 62. When the pump valve 61 is pressed to be contracted and deformed, the first check valve 60a is closed and the second check valve 62a is opened.

  For this reason, the drainage liquid that passes through the connection tube 60 is dropped into the liquid storage bag 63 through the pump valve 61 and the pipe portion 62 in this order. After releasing the pressure of the pump valve 61, the pump valve 61 becomes negative pressure in the process of restoring the original shape by the elastic force, so that the first check valve 60a is opened and the connection tube 60 is opened. The liquid discharged from the pump is guided into the pump valve 61.

Japanese Patent No. 4715770 US Pat. No. 5,0096,35

However, in any of the above-described medical discharge tool (Patent Document 1) and pump tool (Patent Document 2), the first check valve 60a and the second check valve 62a are made of synthetic resin, so that an elastic surplus due to viscoelasticity is obtained. Even if the pressure of the pump valve 61 is released and the inside of the pump valve 61 becomes negative pressure, the second check valve 62a in the pipe portion 62 may not be fully closed and may be slightly opened. is there.
That is, as shown in the operation diagram of FIG. 7 (b), when the pressure inside the pump valve 61 becomes negative at the timing just before the closing of the second check valve 62a from the closing start to the closing end. (Suction duration) may overlap. For this reason, a part of the drained liquid blown from the pipe part 62 to the drainage bag 63 by the pump valve 61 adheres to the distal end part 62c of the pipe part 62 and enters the pipe part 62, thereby causing the retrograde infection. There is a risk of becoming.

  The present invention has been made in view of the above circumstances, and its purpose is to release the second check valve rather than to open the first check valve when the gripping operation to the pump valve is released and the guide pipe becomes negative pressure. By closing the valve early, it is possible to prevent a part of the drainage fluid from being sucked into the guide tube and enter, so that a medical drainage device that contributes to prevention of retrograde infection is provided.

(About claim 1)
The outlet tube connecting portion is connected to a draining outlet tube that is inserted percutaneously into the affected area of a sick person, and has a first check valve made of synthetic resin. The guide tube is connected to the outlet tube connecting portion, and a second check valve made of a synthetic resin is provided inside to guide the drainage from the affected portion to the liquid storage bag from the outlet tube connecting portion.
The pump valve made of an elastic material is connected to the outlet tube connecting portion from a direction different from that of the guide tube, is configured to be elastically deformed by contraction by a grip operation, and to be elastically deformable by release of the grip operation.
Due to the positive pressure generated when the pump valve is contracted and deformed by a gripping operation, the first check valve is closed and the second check valve is opened, whereby the drainage from the affected area is discharged from the guide tube to the storage bag. The first check valve is opened and the second check valve is closed by the negative pressure generated in the process of restoring the original shape after the pump valve is contracted and deformed, and the drainage liquid from the affected area is drawn by the suction force based on the negative pressure. Guide from the connection to the guide tube.
When the elastic coefficient of the second check valve is set to be smaller than the elastic coefficient of the first check valve and the gripping operation to the pump valve is released and the guide pipe becomes negative pressure, the first check valve The second check valve is configured to close earlier than it opens.

In claim 1, after the pump valve is contracted and deformed by a gripping operation to discharge the drainage, the gripping operation to the pump valve is released, and the first check valve opens when the guide pipe becomes negative pressure. The second check valve closes earlier.
That is, since the second check valve is more elastically deformed than the first check valve, the second check valve is opened prior to the opening of the first check valve when the grip operation to the pump valve is released. The valve closes quickly.
This prevents part of the drainage from being sucked into the guide tube when the guide tube becomes negative pressure, and prevents the drainage from entering the guide tube, thereby contributing to the prevention of retrograde infection. be able to.
At this time, with a simple structure in which the elastic coefficient of the second check valve is set to be smaller than the elastic coefficient of the first check valve, a part of the drainage is prevented from flowing back into the guide pipe and sucked. This is advantageous in terms of cost.

(About claim 2)
A connecting cylinder portion is provided in which one end is connected to the outer peripheral surface of the guide tube and the other end is connected to the liquid storage bag. The connecting tube portion is positioned so as to surround the guide tube, and forms a predetermined annular space between the inner peripheral surface of the connecting tube portion and the outer peripheral surface of the guide tube.
In claim 2, when peritoneal gas is generated from the affected area and mixed into the drainage, the peritoneal gas escapes into the annular space while being aided by the siphon function, thereby preventing all of the peritoneal gas from entering the liquid storage bag, Relieves excessive accumulation of the storage bag.
The siphon function in this case indicates an action that promotes a tendency for gas to rise from a narrow portion toward a wide annular space.

(Claim 3)
The connecting tube portion has a stepped tube shape from a large-diameter portion located in the guide tube and a small-diameter portion adjacent to the liquid storage bag.
In claim 3, since a narrow bottleneck is formed between the guide tube and the small diameter portion, even if the abdominal gas mixed in the drainage is blown out from the guide tube, the pressure of the bottleneck is low, so the siphon function is It works effectively, and the abdominal cavity gas blown out from the guide tube can be easily drawn from the small diameter portion to the large diameter portion and easily escaped to the annular space.

(About claim 4)
On the side of the opening end that is opposite to the outlet tube connecting portion of the guide tube, the bellows portion is undulated along the circumferential direction, and the bellows tube is deformed and deformed in accordance with the increase and decrease of the surrounding external pressure. Forming part.
According to the fourth aspect of the present invention, when the drainage is blown out from the guide tube during the gripping operation of the bump body, the bellows cylinder portion is deformed by a negative pressure, so that the internal pressure of the annular space is further reduced. For this reason, when the grip operation with respect to the pump valve is released, the abdominal cavity gas mixed in the drainage is easily released to the annular space.

(Claim 5)
The opening end existing on the opposite side of the guide tube from the outlet tube connecting portion has a terminal ring portion that is tapered toward the liquid storage bag.
According to the fifth aspect, when the pump valve is compressed and deformed by a gripping operation, the drainage can be smoothly discharged along the terminal ring portion.

(About claim 6)
The opening end portion side of the guide tube opposite to the outlet tube connecting portion forms a rubber tube portion having a small thickness. The rubber cylindrical portion is provided so as to be elastically deformable according to the increase / decrease change of the surrounding external pressure.
According to the sixth aspect of the present invention, when the drainage liquid is blown out from the guide tube, the rubber cylinder portion receives a negative pressure, so that the rubber cylinder portion is deformed so as to squeeze inward, and the internal pressure of the annular space further decreases. To come. For this reason, when the pump valve is compressed and deformed by gripping operation, the abdominal gas mixed in the drainage is easily released to the annular space, as described in the fourth aspect.

It is a front view of the medical drainage apparatus shown in the state applied to the affected part of a sick person (Example 1). (A) is a front view of the principal part of the medical drainage device shown by breaking the principal part, (b), (c) are enlarged perspective views of the first check valve and the second check valve (Example) 1). (A) is a longitudinal cross-sectional view of a guide cylinder and a connection cylinder part, (b) is a front view which shows the effect | action of a bellows part, (c) is a perspective view which shows the aspect which a bellows part deform | transforms in diameter reduction and expansion. (Example 2). The longitudinal cross-sectional view of a guide cylinder and a connection cylinder part (Example 3). The longitudinal cross-sectional view of a guide cylinder and a connection cylinder part (Example 4). The longitudinal cross-sectional view of a guide cylinder and a connection cylinder part (modification). (A) is a longitudinal cross-sectional view which shows the principal part of the medical discharge tool and pump tool in the past, (b) is an operation diagram which shows the relationship between the closing process of the conventional check valve, and the suction duration.

  The medical drainage device of the present invention is technically characterized by a structure that prevents retrograde infection in a cost-effective manner with a simple structure.

[Configuration of Example 1]
A first embodiment of the present invention will be described with reference to FIGS.
The medical drainage device 1 according to the present invention is placed in the body when draining urine from a catheter (not shown) inserted and placed through the mouth of the external urethra of a patient with reduced urination function, or after laparotomy. Used when draining blood, pus, exudate, digestive fluid, etc. from the body through a catheter.

In such a medical drainage device 1, as shown in FIG. 1, the drainage outlet tube 2 is inserted percutaneously into the affected part 4 of the patient 3 via a catheter (not shown).
As shown in FIG. 2A, the lead-out tube 2 is connected to a lead-out tube connecting portion 5 provided with a first check valve 5a made of synthetic resin. A guide tube 6 is connected to the lead-out tube connecting portion 5, and a second check valve 6 a made of synthetic resin is provided inside the guide tube 6, and the drainage from the affected portion 4 is accumulated from the lead-out tube connecting portion 5. Guide to liquid bag 7.

  Both of the first check valve 5a and the second check valve 6a are cylindrical bodies with tips, and are normally closed as shown in FIG. 2 (b). When the first cylinder portion 5d of the first check valve 5a and the second cylinder portion 6d of the second check valve 6a receive an internal pressure of a predetermined level or more, as shown in FIG. 2 (c), the first check valve The first valve port 5e of the valve 5a and the second valve port 6e of the second check valve 6a are elastically expanded and deformed to open.

  The pump valve 8 is formed of a plastic material made of an elastic material such as vinyl chloride or silicone resin so as to exhibit a spheroid having a hollow outer shape. This pump valve 8 is connected to the outlet tube connecting portion 5 from a direction different from that of the guide tube 6, and is elastically deformed by contraction by a gripping operation and can be elastically deformed by releasing the gripping operation.

The connecting tube portion 9 is a plastic throat tube, one end of which is liquid-tightly connected to the outer peripheral surface of the guide tube 6 and the other end is liquid-tightly connected to the liquid storage bag 7. The connecting tube portion 9 is positioned so as to concentrically surround the guide tube 6, and a predetermined annular space 10 is formed between the inner peripheral surface of the connecting tube portion 9 and the outer peripheral surface of the guide tube 6. It is formed as.
That is, the connecting tube portion 9 has a stepped tube shape from a large diameter portion 9 a located in the guide tube 6 and a small diameter portion 9 b adjacent to the liquid storage bag 7.

In the above configuration, when the pump valve 8 is contracted and deformed by a gripping operation, the first check valve 5a is closed and the second check valve 6a is opened, so that the drainage liquid from the affected part 4 is discharged from the guide tube 6 to the storage bag. 7 to discharge.
In the process of restoring the original shape after the pump valve 8 is contracted and deformed, the first check valve 5a is opened and the second check valve 6a is closed, so that the inside of the outlet tube connecting portion 5 and the inside of the guide tube 6 are formed. Negative pressure is applied, and drainage from the affected area 4 is guided from the outlet tube connecting portion 5 to the guide tube 6 by the suction force.

When the elastic coefficient of the second check valve 6a is set smaller than the elastic coefficient of the first check valve 5a, the gripping operation to the pump valve 8 is released, and when the guide pipe 6 becomes negative pressure, In the operating temperature range (for example, room temperature), the second check valve 6a is closed earlier than the first check valve 5a is opened.
The pump valve 8 is configured so that a negative pressure is generated in the annular space 10 by the drainage discharged from the guide pipe 6 in the process from the start to the end of the contraction deformation of the pump valve 8 by the grip operation.

[Effect of Example 1]
As described above, in the above-described configuration, after the pump valve 8 is contracted and deformed by the gripping operation and the drainage is discharged, the gripping operation to the pump valve 8 is released, and when the guide pipe 6 becomes negative pressure, The second check valve 6a is closed earlier than the check valve 5a is opened.
That is, since the second check valve is more elastically deformed than the first check valve, the second check valve 5a is opened prior to the opening of the first check valve 5a when the grip operation to the pump valve 8 is released. The check valve 6a closes quickly.
Thereby, when the guide tube 6 becomes negative pressure, a part of the drainage is not sucked into the guide tube 6 and the drainage is prevented from entering the guide tube 6, thus preventing retrograde infection. Can contribute.
At this time, a simple structure in which the elastic coefficient of the second check valve 6a is set to be smaller than the elastic coefficient of the first check valve 5a, so that a part of the drainage flows back into the guide pipe 6 and is sucked. This is advantageous in terms of cost.

The connecting tube portion 9 is positioned so as to surround the guide tube 6, and a predetermined annular space 10 is formed between the inner peripheral surface of the connecting tube portion 9 and the outer peripheral surface of the guide tube 6. For this reason, when peritoneal gas is generated from the affected part 4 and mixed into the drainage, as shown by the arrow S in FIG. 2A, the peritoneal gas escapes into the annular space 10 while being assisted by the siphon function, thereby Is prevented from entering the liquid storage bag, and the excessive accumulation of the liquid storage bag is mitigated.
In this case, the siphon function indicates an action that promotes a tendency for gas to rise from a narrow portion toward a wide annular space 10.

  The connecting cylinder portion 9 has a stepped cylindrical shape from a large diameter portion 9 a located in the guide tube 6 and a small diameter portion 9 b adjacent to the liquid storage bag 7. In this case, a narrow bottleneck 13 is formed between the guide tube 6 and the small-diameter portion 9b, so that the internal pressure of the bottleneck 13 is lowered by the drainage liquid blown out from the guide tube 6. For this reason, when the siphon function works effectively, even when abdominal cavity gas is mixed in the drainage, the abdominal cavity gas blown out from the guide tube 6 is easily drawn from the small diameter portion 9b to the large diameter portion 9a. The abdominal gas is easily released into the annular space 10.

[Configuration of Example 2]
FIG. 3 shows a second embodiment of the present invention. Example 2 differs from Example 1 in that the opening end portion side of the guide tube 6 opposite to the outlet tube connection portion 5 is a bellows cylinder portion 15 made of a thin synthetic resin (FIG. 3 ( a) and (b)).
The bellows tube portion 15 has a flange portion 15A that undulates along the circumferential direction, and elastically reduces its diameter in accordance with an increase or decrease in the surrounding external pressure, as shown by a solid line and a two-dot chain line in FIG. Deformation and diameter expansion deformation.

  In the second embodiment, when the drainage is blown out from the guide tube 6, the bellows tube portion 15 is deformed by a negative pressure, so that the internal pressure of the annular space 10 is further reduced. For this reason, when the pump valve 8 is contracted and deformed by a gripping operation, the abdominal cavity gas mixed in the drainage fluid is easily released to the annular space 10.

[Configuration of Example 3]
FIG. 4 shows a third embodiment of the present invention. Example 3 differs from Example 1 in that the open end on the opposite side of the guide tube 6 from the outlet tube connecting part 5 is formed with a terminal ring part 16 that is tapered toward the liquid storage bag 7. That is.
The taper angle φ of the terminal ring portion 16 is set to be smaller than the valve opening angle θ of the second check valve 6a (φ <θ). The taper angle φ is an angle that the terminal ring portion 16 forms with the second cylinder portion 6d of the guide tube 6 on the drainage side, and the valve opening angle θ is when the second check valve 6a is opened. This is the angle that the second check valve 6 a forms with the second cylindrical portion 6 d of the guide tube 6 on the drainage side.

In the third embodiment, since the terminal ring portion 16 is formed at the opening end of the guide tube 6, the drainage is blocked by the terminal ring portion 16 and goes back to the guide tube 6 when discharging the pump valve 8 to contract and deform by gripping operation. It becomes difficult to do.
Further, since the taper angle φ of the terminal ring portion 16 is smaller than the valve opening angle θ of the second check valve 6a, the terminal ring portion 16 is drained when the drainage is discharged from the second check valve 6a. Does not interfere with the discharge.

[Configuration of Example 4]
FIG. 5 shows a fourth embodiment of the present invention. The fourth embodiment differs from the first embodiment in that a rubber tube portion 17 having a small thickness is provided in a connected state on the opening end portion side of the guide tube 6 opposite to the outlet tube connecting portion 5. is there.

  The rubber cylinder portion 17 can be elastically expanded and contracted elastically in accordance with the increase or decrease of the surrounding external pressure. Styrene-butadiene rubber (SBR), butadiene rubber (BR), chloroprene rubber can be used as synthetic rubber. (CR), isoprene rubber (IR), isobutylene / isoprene rubber (IIR), ethylene propylene rubber (EPM, EPDM), or a synthetic rubber material such as silicone rubber.

In the fourth embodiment, when the drainage liquid is blown out from the guide tube 6, the rubber cylinder portion 17 is reduced in diameter so as to be constricted inward as indicated by a two-dot chain line in FIG. 5. The internal pressure of the space 10 is further reduced. For this reason, when releasing the grip operation on the pump valve 8, the abdominal gas mixed in the drainage is effectively released to the annular space 10 as described in the second embodiment.
The guide tube 6 and the connecting tube portion 9 are not limited to the concentric arrangement, and as shown in FIG. 6 as a modified example, the guide tube 6 and the connecting tube portion 9 are not arranged concentrically. May be.
The non-concentric arrangement in this case makes it possible to identify that the type of the medical drainage device 1 is a different type, and to reduce the possibility of misidentifying other types as desired types.

[Modification]
(A) As a synthetic resin used for the lead-out tube connecting portion 5, the guide tube 6 and the connecting tube portion 9 in the medical drainage device 1, a general plastic material can be applied, including polypropylene, polyvinyl chloride (PCV), and acrylonitrile.・ Butadiene-styrene copolymer (ABS resin), polyacetal, polyamide (PA), polycarbonate (PC), polyphenylene ether (PPE), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polyethylene (PE) or syndiotact A plastic material such as tic polystyrene (SPS) may be applied. You may form the raw material of the liquid storage bag 7 with the same plastic material as the above.

(B) The liquid storage bag 7 may be provided so as to be detachable with respect to the guide tube 6 and the connecting tube portion 9, and the full liquid storage bag 7 may be removed and replaced with a new liquid storage bag. .

(C) The pump valve 8 is not limited to a spheroid, and may be formed based on various shapes such as a sphere, a bowl, a bowl, a cylinder, or a donut.
(D) In the first to third embodiments, when the guide tube 6 becomes negative pressure, the second check valve 6a is opened earlier than the first check valve 5a is opened in the normal operating temperature range (for example, room temperature). Although it was closed, the ambient temperature at which the medical drainage device 1 is installed and used is a constant temperature with little fluctuation, and thus is only described in a careful sense from the normal operating temperature range.

  In the medical drainage device according to the present invention, when the guide tube becomes negative pressure, a part of the drainage is not sucked into the guide tube and the drainage is prevented from entering the guide tube. In order to contribute to prevention, postoperative hygiene benefits to patients arouse the demand of contractors and contribute to the chemical and mechanical industry through the distribution of related parts.

DESCRIPTION OF SYMBOLS 1 Medical drainage apparatus 2 Derivation tube 3 Sick person 4 Affected part 5 Derivation tube connection part 5a 1st check valve 6 Guide pipe 6a 2nd check valve 7 Liquid storage bag 8 Pump valve 9 Connecting cylinder part 9a Large diameter part 9b Small diameter Part 10 annular space 15 bellows cylinder part 15A saddle part 16 terminal ring part 17 rubber cylinder part

Claims (6)

A lead-out tube connecting part connected to a lead-out tube for drainage inserted percutaneously into the affected part of the sick and provided with a first check valve made of synthetic resin inside;
A guide tube connected to the lead-out tube connecting part, and provided with a second check valve made of synthetic resin inside to guide the drainage from the affected part from the lead-out tube connecting part to the liquid storage bag;
A pump valve made of an elastic material that is connected to the lead-out tube connecting portion from a different direction from the guide tube, is elastically deformed by a gripping operation, and is elastically deformable by releasing the gripping operation;
The positive pressure generated when the pump valve is contracted and deformed by the gripping operation causes the first check valve to close and the second check valve to open, thereby draining liquid from the affected area from the guide tube. Suction based on the negative pressure by opening the first check valve and closing the second check valve due to the negative pressure generated in the process of discharging to the liquid bag and restoring the original shape after the pump valve is contracted and deformed The drainage from the affected area is guided by force from the outlet tube connecting portion to the guide tube,
When the elastic coefficient of the second check valve is set smaller than the elastic coefficient of the first check valve, the grip operation to the pump valve is released, and when the guide pipe becomes negative pressure, A medical drainage device configured to close the second check valve earlier than the first check valve opens.   One end is connected to the outer peripheral surface of the guide tube, and the other end is connected to the liquid storage bag. A connection tube portion is provided so as to surround the guide tube, and the connection tube The medical drainage device according to claim 1, wherein a predetermined annular space is formed between an inner peripheral surface of the portion and an outer peripheral surface of the guide tube.   The medical drainage according to claim 2, wherein the connecting cylinder part has a stepped cylinder shape from a large diameter part located in the guide tube and a small diameter part adjacent to the liquid storage bag. apparatus.   On the side of the opening end of the guide tube opposite to the outlet tube connecting portion, the heel side portion undulates along the circumferential direction, and undergoes diameter-reduction deformation and diameter-expansion deformation according to changes in the surrounding external pressure. The medical drainage device according to claim 1, wherein a bellows tube portion is formed.   2. The medical drainage according to claim 1, wherein an open end of the guide tube on the side opposite to the outlet tube connecting portion has a terminal ring portion that is tapered toward the liquid storage bag. apparatus.   The opening end side of the guide tube opposite to the lead-out tube connecting portion forms a rubber tube portion having a small wall thickness, and is provided so as to be elastically deformable in accordance with an increase or decrease in the surrounding external pressure. The medical drainage device according to claim 1, wherein:

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