CN113144306A

CN113144306A - Easy-to-operate drainage device with low biological pollution risk

Info

Publication number: CN113144306A
Application number: CN202110432789.8A
Authority: CN
Inventors: 祝捷
Original assignee: Shenzhen Weisheng Hydraulic Technology Co ltd
Current assignee: Shenzhen Weisheng Hydraulic Technology Co ltd
Priority date: 2021-04-21
Filing date: 2021-04-21
Publication date: 2021-07-23

Abstract

A device for removing body fluids from a body cavity by active aspiration. Comprises a drive control part, an air suction pump, a negative pressure cavity, a sealing plug and a collector. The collector comprises a collection bag and a drain tube that have been integrated together. The drainage tube comprises a near end and a far end, the near end of the drainage tube is hermetically connected with the collection bag and communicated with the inside of the collection bag, and the far end of the drainage tube is hermetically connected with the body cavity and communicated with the inside of the body cavity. When the drainage tube is used, the sealing plug is matched with the negative pressure cavity to form a closed cavity, the collection bag is arranged in the negative pressure cavity, and the drainage tube is led out of the negative pressure cavity through the sealing plug. The air pump is connected with the negative pressure cavity. The invention is characterized in that the sealing plug is provided with a clamping groove, the drainage tube can be clamped into the sealing plug, the sealing plug has elasticity, and when the sealing plug is tightly pressed with the negative pressure cavity, the elastic sealing of the sealing plug and the negative pressure cavity and the elastic sealing of the sealing plug and the drainage tube are simultaneously formed by the deformation of the sealing plug. Thereby the equipment process has been simplified, and the collector is kept apart with the operator all the time in one side of instrument, and sealed lid and drainage thing contactless also need not plug internal surface and probably by drainage contaminated joint with the dismantlement process, and the drainage thing that probably causes splashes when having avoided the split, has reduced the biological pollution risk.

Description

Easy-to-operate drainage device with low biological pollution risk

Technical Field

The present invention relates to a device for removing fluid from a body cavity, preferably a chest drainage device.

Background

A drainage device is a device for removing body fluids from a wound by active suction from a body cavity, such as the chest, stomach or any other body cavity. For draining fluids from a body cavity or wound to accelerate healing, for example after an open chest surgery. The device generally includes a suction pump, a collector connected to an underwater sealed container, and a drain tube having a distal end and a proximal end. The proximal end of the drainage tube is connected with a catheter inserted into the body cavity, and the distal end of the drainage tube extends into the collector or the underwater sealed container respectively.

The drainage will enter the drain and collector, so the drain and collector are usually disposable and are the consumable part of the drainage device. The control portion, the negative pressure source, the fluid pathway, and the sensors for feedback, which are typically costly, reusable, and unwashable, are non-consumable parts of the drainage device. The disclosed technology uses a soft plastic bag as a collector, which has a lower material cost than a rigid container that can withstand a certain internal negative pressure without deformation. Typically the collector of soft material is placed in a rigid sub-atmospheric chamber having an opening of sufficient cross-sectional area to pass through the collector. The negative pressure cavity is provided with a sealing cover which is matched with the opening. And the drainage channel must be sealed through the sealing cover. In this regard, the disclosed techniques incorporate various more complex features. The complexity of these features is concentrated in the seal cap and its periphery. Generally comprises the following steps: a rigid sealing cover comprising an external interface and an internal interface, wherein the internal interface is connected with the collecting cavity, and the external interface is connected with the drainage tube. Such as disclosed US5386735A, CN109331255A, US3855997A, US3648698A, US 3699815A. The problem that arises is that if the closure itself is used as a non-consumable part, there is a problem of biological contamination, since the drainage passes through some of its features, such as the "solenoid valve" in CN109331255A, or the "conduit 116" in US 5386735A; if the sealing cap is used as a consumable part, the cost of the consumable is increased. Nevertheless, these structural features are ultimately aimed at placing the drain tube in communication with the inside of the collection bag, which, if they are disassembled into several parts, entails a manual assembly process, complicating the operation process.

Disclosure of Invention

It is an object of the present invention to provide a device for removing body fluids from a body cavity by active suction. The device can be when using soft low-cost consumptive material, and the consumptive material possesses the integral structure, has simplified operation process. Under the advantages of low cost and easy replacement, the drainage device has stronger popularization.

The device comprises a drive control part, an air suction pump, a negative pressure cavity, a sealing plug and a collector. The collector comprises a collection bag and a drain tube that have been integrated together. The drainage tube comprises a near end and a far end, the near end of the drainage tube is hermetically connected with the collection bag and communicated with the inside of the collection bag, and the far end of the drainage tube is hermetically connected with the body cavity and communicated with the inside of the body cavity. When the drainage tube is used, the sealing plug is matched with the negative pressure cavity to form a closed cavity, the collection bag is arranged in the negative pressure cavity, and the drainage tube is led out of the negative pressure cavity through the sealing plug. The air pump is connected with the negative pressure cavity. The invention is characterized in that the sealing plug is provided with a clamping groove, the drainage tube can be clamped into the sealing plug, the sealing plug has elasticity, and when the sealing plug is tightly pressed with the negative pressure cavity, the elastic sealing of the sealing plug and the negative pressure cavity and the elastic sealing of the sealing plug and the drainage tube are simultaneously formed by the deformation of the sealing plug. Thereby simplifying the assembly process, especially the outer side of the sealing cover does not need to be butted with the drainage tube, and the inner side of the sealing cover does not need to be butted with the drainage bag. The collector is kept apart with the operator all the time in one side of instrument, and sealed lid and drainage thing contactless also need not plug internal surface and probably by drainage contaminated joint with the dismantlement process, and the drainage thing that probably causes when having avoided the split splashes, has reduced the biological pollution risk.

Advantageously, the drainage device of the invention may also comprise the following features: the collecting bag may be wrapped in a relatively low cost flexible material.

Drawings

FIG. 1 is a schematic diagram of the principle of the device for removing body fluids from a body cavity by active aspiration of the present invention;

FIG. 2 is a schematic perspective view of the device for removing body fluids from a body cavity by active aspiration according to the present invention, shown in pre-assembly relationship;

FIG. 3 is a schematic diagram of the assembled spatial relationship of the device for removing body fluids from a body cavity by active aspiration of the present invention;

FIG. 4 is a schematic perspective view of an exemplary sealing plug of the device for removing body fluids from a body cavity by active suction of the present invention;

FIG. 5 is a schematic perspective view of a typical sealing plug of the device for removing body fluids from a body cavity by active suction of the present invention after manual expansion;

FIG. 6 is a schematic representation of an alternative embodiment of the device for removing body fluids from a body cavity by active aspiration of the present invention.

Detailed Description

Referring to fig. 1, 2 and 3, a drainage device 1 comprises a drive control part 2, a collector 3, a negative pressure cavity 4, a sealing plug 5 and an air pump 6. Wherein the collector 3 comprises a collecting bag 3' and a drain tube 3 ″ which have been integrated together. The collection bag 3 ' is connected with the drainage tube 3 ' ' in a sealing way, and the interior is communicated. In use, the collection bag 3' is placed into the negative pressure chamber 4. The drain tube 3 "is passed through the through hole 5' in the sealing plug 5. And then a sealing plug 5 is arranged in the negative pressure cavity 4 to form a closed cavity. When the device is used, the driving control part controls the air suction pump 6 to be started, air in the negative pressure cavity 4 is sucked along the direction of the flow path 8 and is discharged out of the device from the interface 9. Thereby generating negative pressure inside the negative pressure cavity 4, and the liquid on the upstream side of the body cavity direction 10 is guided to the collector along the direction 11 under the negative pressure.

The sealing plug 5 can be tightly matched with the negative pressure cavity 4 to realize sealing. The sealing plug 5 is preferably made of a sealing material having elasticity, such as rubber. The sealing plug 5 achieves an elastic sealing with the underpressure chamber 4 by pressing against the mating surface, as shown in fig. 2. When the sealing plug 5 and the negative pressure cavity 4 are elastically sealed, the sealing plug 5 and the outer wall of the drainage tube 3 '' are also elastically sealed. The opening of the underpressure chamber 4 cooperating with the sealing plug 5 must be sufficient to pass the collection bag 3' which is sufficiently loaded with drainage. When removing the collecting bag 3' from the underpressure chamber 4, the sealing plug 5 must also be removed first.

As shown in fig. 4, the sealing plug 5 has a through hole 5' and a through slot 5 ″. The through hole 5' has an inner diameter slightly smaller than the outer diameter of the draft tube 3 ″. As the proximal end of the drainage tube is connected with the joint for connection and the distal end is connected with the collection bag 3', both ends can not pass through the through hole of the sealing plug 5 under normal conditions. Although the passage through the through-hole can be achieved by making the outer diameter of the proximal end of the connector smaller than the outer diameter of the drainage tube 3 ", the inner diameter of the through-hole 5 'must be smaller than the outer diameter of the drainage tube 3" to achieve a squeeze seal, under which the friction of the tube passing through the through-hole of the sealing plug and the process of placing the sealing plug on the side close to the collecting bag 3' are more difficult. As shown in fig. 4, the invention is practiced by cutting from the through hole 5' to one edge of the sealing plug 5 to form a through groove 5 ″. The operator needs to manually expand the through slot 5 ″ in the direction of the arrow 14 before a new drainage is started, as shown in fig. 5. The drainage tube 3 'is clamped into the through hole 5' through the through groove 5 ', and after the sealing plug 5 is assembled to the negative pressure cavity 4 in an extruding mode, the through groove 5' is closed and sealed through extrusion force.

In order to reduce the difficulty of said expansion, the through slot 5 ″ may extend at one end to the edge of the sealing plug 5 and at the other end to a position further away from said edge than the through hole 5'. As shown in fig. 5.

The invention is not limited to whether the sealing plug 5 is part of a consumable. Since the sealing plug 5 itself does not need to integrate any other features and is less costly than a rigid cover integrated with a joint, seal, the sealing plug 5 can be a one-piece consumable with the collector housing and the collector 3 discarded together with the sealing plug 5 after use.

The collecting bag 3' is made of a material wrap. The material may be deformable under vacuum pressure. The collecting bag 3' may be of a transparent material or may be of an opaque material. The transparent material may facilitate the operator to observe the conditions of the liquid flow into the interior of the collection bag 3', including color, flow rate, etc. The collecting bag 3' can be provided with scale marks for facilitating the reading of the internal drainage volume by an operator. The collecting bag 3' can be made of a variety of materials, such as polyethylene composites and the like.

The invention does not reduce the flexibility of cooperating with various sensors due to the simplification of the sealing cover. On the contrary, the sealing cover which is used as a part of the sealed negative pressure cavity is isolated from biological pollutants, so that the risk that the pollutants are splashed into the cavity and the sensor in the cavity due to the plugging and unplugging pipeline is reduced. The main purpose of the sensors in the drive control section 2 is to detect drainage conditions such as volume, mass, surface colour, etc., and the sensor types may include: weighing sensor, photoelectric sensor, temperature sensor, pressure sensor, visual identification sensor, etc. Preferably, the sensor 12 is a pressure sensor for monitoring the vacuum level inside the negative pressure chamber 4 and the sensor 13 is a load cell for monitoring the change in mass of the collection bag. When using a load cell, the weighing platform of the load cell is placed directly below the collection bag 3 ', the part of the drain tube 3 ″ located inside the negative pressure chamber being sufficiently long for the collection bag 3' to be in a state of free fall to the weighing platform inside the negative pressure chamber 4.

The drive control part 2 may also contain a man-machine interface, such as buttons, displays, switches, etc., and the control part 2 may comprise a housing separate or common to the negative pressure chamber.

The drainage tube 3' can be directly placed in the body cavity of the patient, and can also be connected with a pipeline which is already placed in the body cavity of the patient. It is generally preferred that the drain tube 3 "is connected to the open to atmosphere end of the drain tube already placed in the body cavity.

The negative pressure chamber 4 may be completely transparent or partially transparent to facilitate the operator's view of the interior.

As shown in fig. 5, the drive control section 2 and the suction pump 6 may be placed inside the negative pressure chamber 4 or outside the negative pressure chamber. When the air pump 6 is placed in the negative pressure cavity 4, the outlet of the air pump is communicated with the outside of the negative pressure cavity; when the suction pump 6 is placed outside the negative pressure chamber 4, the inlet of the suction pump communicates with the interior of the negative pressure chamber, and the drainage device 1 is disassembled into 1 'and 1 ", and sealed passages 15 exist in 1' and 1". The 1 '' portion can be replaced by any controllable air extraction device, such as a manual air extraction pump, a negative pressure suction device, a ward central negative pressure system and the like. Wherein the

sensors

12, 13 may still be weighing sensors selected as an option, weighing using a skinning method, e.g. weighing the 1' whole, and taking the difference before and after drainage is completed.

While the invention has been described in detail in connection with specific embodiments thereof, it is apparent that the foregoing description, as well as the illustrations within the drawings, are to be considered exemplary rather than limiting. It will be apparent to those skilled in the art that various modifications or variations can be made in the present invention based on the principles thereof. Such variations and modifications do not depart from the spirit and scope of the present invention.

Claims

1. A device (1) for removing body fluids from a body cavity by active suction, comprising a drive control part (2), a suction pump (6), a negative pressure chamber (4), a sealing plug (5) and a collector (3), said collector (3) comprising a collection bag (3 ') and a drainage tube (3 ") integrated together, the drainage tube (3") comprising a proximal end and a distal end, the proximal end of the drainage tube (3 ") being sealingly connected and internally communicating with the collection bag (3 ') and the distal end being sealingly connected and internally communicating with the body cavity, in use the sealing plug (5) cooperating with the negative pressure chamber (4) to form a closed chamber, the collection bag (3 ') being inside the negative pressure chamber (4), the drainage tube (3") leading out of the negative pressure chamber (4) through the sealing plug (5), said suction pump (6) being connected to the negative pressure chamber (4), characterized in that the sealing plug (5) is elastic, the sealing plug (5) is provided with a clamping groove consisting of a through hole and a through groove, the through hole (5 ') and the through groove (5 ' ') both extend from one side of the inside of the negative pressure cavity (4) sealed by the sealing plug (5) to one side of the outside of the negative pressure cavity (4), the through groove (5 ' ') is communicated with the through hole (5 ') to one side surface of the sealing plug (5) for sealing, the through groove (5 ' ') can be manually expanded, and the drainage tube (3 ' ') is clamped into the through hole (5 ') through the through groove (5 ' '); when the sealing plug is tightly pressed with the negative pressure cavity (4), the deformation of the sealing plug (5) simultaneously forms the elastic sealing of the sealing plug (5) and the negative pressure cavity (4) and the elastic sealing of the sealing plug (5) and the drainage tube (3 '').

2. Device for removing body fluids from a body cavity by suction according to claim 1, characterised in that the collecting bag (3') is made of a flexible soft material.