CN-116407164-B - Lavage catheter

Abstract

The invention provides an lavage catheter which comprises a handle assembly and a catheter assembly, wherein the handle assembly comprises a shell and a movable assembly, the movable assembly is movably arranged in the shell, the movable assembly comprises a first state and a second state relative to the shell, the catheter assembly comprises a catheter tube body and an ejecting unit, an opening communicated with the outside is formed in the distal end of the catheter tube body, the ejecting unit comprises a connecting wire and an ejecting part, the proximal end of the connecting wire is connected with the movable assembly, the distal end of the connecting wire is connected with the ejecting part, when the movable assembly is in the first state, the connecting wire is tensioned, the ejecting part is received in the catheter tube body, and when the movable assembly is in the second state, the connecting wire is loosened, and the ejecting part ejects from the opening. According to the lavage catheter provided by the invention, the popup part popup from the opening, so that a certain space gap is opened between the bronchial wall of the subsection and the opening, and the situation that the opening is plugged by tightly attaching the bronchial wall of the subsection to the catheter body under negative pressure is prevented, so that the suction of liquid after lavage is difficult.

Inventors

• XIA QINGSONG
• Hu Longhu
• LI ANNING

Assignees

• 深圳市先健呼吸科技有限公司

Dates

Publication Date

20260512

Application Date

20211231

Claims (10)

1. 1. The lavage catheter is characterized by comprising a handle assembly and a catheter assembly, wherein the handle assembly comprises a shell and a movable assembly, the movable assembly is movably arranged in the shell, the movable assembly comprises a first state and a second state relative to the shell, the catheter assembly comprises a catheter tube and an ejecting unit, the distal end of the catheter tube is provided with an opening communicated with the outside, the catheter tube comprises a hollow pipeline communicated with the proximal end port and the distal end port of the catheter tube, the ejecting unit comprises a connecting wire and an ejecting part, the proximal end of the connecting wire is connected with the movable assembly, the distal end of the connecting wire is connected with the ejecting part, when the movable assembly is in the first state, the connecting wire is tensioned, the ejecting part is received in the catheter tube, when the movable assembly is in the second state, the connecting wire is loosened, the ejecting part is ejected from the opening and is positioned outside the catheter tube so as to prop a certain space between the bronchial wall and the opening, and when the first state and the second state are communicated with the hollow pipeline.
2. 2. The lavage catheter of claim 1 further comprising a catheter hub secured to a distal end port of said catheter tube, said pop-up comprising a connecting section and a pop-up section, said distal end of said connecting wire being connected to a proximal end of said pop-up section, one end of said connecting section being secured to said proximal end of said catheter hub, the other end of said connecting section being connected to said distal end of said pop-up section, and said pop-up section being positioned to correspond radially to said opening.
3. 3. An lavage catheter as defined in claim 2 wherein said catheter assembly further comprises a fastener body, said connection section being wrapped around said fastener and secured together within said catheter head.
4. 4. An lavage catheter as in claim 2 wherein said pop-up section comprises a convex elastic wire.
5. 5. An lavage catheter as in claim 2 wherein said opening comprises a first opening and a second opening, said first opening and said second opening comprising a blocking portion therebetween, said blocking portion blocking a portion of said pop-up section from an exterior of said catheter tube.
6. 6. An lavage catheter as in claim 5 wherein said blocking portion is provided with a receiving groove on an outer side thereof.
7. 7. The lavage catheter of claim 1 wherein said pop-up unit further comprises an elastic connection portion and a stopper portion fixed to a distal end of said catheter tube, said stopper portion being located on a proximal side of said pop-up portion, said pop-up portion being connected to said stopper portion by said elastic connection portion, a distal end of said connection wire passing through said stopper portion and said elastic connection portion, and said distal end of said connection wire being connected to a proximal end of said pop-up portion, said opening being a distal end port of said catheter tube, said distal end of said pop-up portion being adjacent to or flush with said distal end port of said catheter tube in a first state.
8. 8. An lavage catheter as in claim 7 wherein said pop-up portion comprises a deformation portion woven from a material having shape memory and anchors at both ends of said deformation portion to constrict said deformation portion.
9. 9. An lavage catheter as in claim 8 wherein said anchor comprises an anchor plate, said anchor plate on a proximal side comprising a plurality of through holes and said anchor plate on a distal side being annular.
10. 10. An lavage catheter as defined in claim 9 wherein said anchor plate has a maximum width less than an inner diameter of said catheter tube and said deformed portion has a maximum radial dimension greater than an outer diameter of said catheter tube in a naturally expanded state.

Description

Lavage catheter Technical Field The invention relates to the technical field of interventional medical instruments, in particular to an lavage catheter. Background Bronchoalveolar lavage is a method of injecting physiological saline into bronchoalveoli using bronchoscope and then sucking out, collecting effective fluid on the alveolar surface, and examining its cellular components and soluble substances. Clinically, the kit is used for diagnosing various lung diseases, such as clinical diagnosis of alveolitis, pulmonary fibrosis, asbestos lung, lung cancer, pulmonary alveolar protein deposition and the like, differential diagnosis, researching etiology and pathogenesis of the lung diseases, evaluating curative effect and the like. The current lavage catheter generally conveys lavage catheter instruments into a target bronchus through a bronchoscope so as to realize the injection of normal saline into the target bronchus through the injection port, after lavage, the lavage catheter is switched to a suction state, and negative pressure equipment is opened to complete suction, so that primary lavage and suction can be completed. Because bronchoscope size is limited, can't stretch into more secondary bronchus, can only have lavage pipe to stretch into towards the sublevel after stretching out from bronchoscope, and the bronchus sublevel is narrower, when lavage pipe is in negative pressure suction state, lead to the bronchus wall to laminate the opening that is used for the drawing liquid of pipe body distal end under the negative pressure effect easily to lead to unable suction out the lavage liquid in the bronchus, make the rate of recovery of lavage liquid not high, probably lead to lavage liquid retention to arouse complications such as hypoxia, fever in the trachea. Disclosure of Invention The invention aims to solve the technical problem that in the prior art, the suction difficulty is caused by the fact that the bronchial wall is easily attached to the opening for drawing liquid at the far end of the catheter body under the action of negative pressure in the negative pressure suction state. The technical scheme adopted for solving the technical problems is as follows: An embodiment of the invention provides an lavage catheter, which comprises a handle assembly and a catheter assembly, wherein the handle assembly comprises a shell and a movable assembly, the movable assembly is movably arranged in the shell, the movable assembly comprises a first state and a second state relative to the shell, the catheter assembly comprises a catheter tube and an ejecting unit, an opening communicated with the outside is formed in the distal end of the catheter tube, the ejecting unit comprises a connecting wire and an ejecting part, the proximal end of the connecting wire is connected with the movable assembly, the distal end of the connecting wire is connected with the ejecting part, when the movable assembly is in the first state, the connecting wire is tensioned, the ejecting part is received in the catheter tube, and when the movable assembly is in the second state, the connecting wire is loosened, and the ejecting part ejects from the opening. In an embodiment of the present invention, the lavage catheter further includes a catheter head fixed to the distal end opening of the catheter tube, the popup part includes a connection section and a popup section, the distal end of the connection wire is connected to the proximal end of the popup section, one end of the connection section is fixed to the proximal end of the catheter head, the other end of the connection section is connected to the distal end of the popup section, and the popup section corresponds to the opening in a radial direction. In one embodiment of the present invention, the catheter assembly further comprises a fixing body, and the connecting section is wound around the fixing piece and fixed in the catheter head together. In one embodiment of the invention, the ejection segment comprises a male elastic wire. In an embodiment of the invention, the opening includes a first opening and a second opening, and a blocking portion is included between the first opening and the second opening, and the blocking portion blocks a part of the ejecting section from the outside of the catheter tube. In an embodiment of the invention, an accommodating groove is formed on the outer side of the blocking portion. In an embodiment of the present invention, the ejecting unit further includes an elastic connection portion and a limiting portion fixed to a distal end of the catheter tube, the limiting portion is located at a proximal side of the ejecting portion, the ejecting portion and the limiting portion are connected through the elastic connection portion, a distal end of the connecting wire passes through the limiting portion and the elastic connection portion and is connected to a proximal end of the ejecting portion, and in a first state, the distal end of the ejec