Catheter indwelling infusion needle with thick and thin liquid passing side hole needle tube

By setting the liquid-through side hole and the double-through fluid outlet channel in the puncture needle tube where the infusion needle is indwelled in the catheter, the problems of insufficient infusion flow rate and complex puncture operation are solved, and efficient infusion and simple operation are achieved.

CN222623454UActive Publication Date: 2025-03-18BESTWAY (CHANGTING) MEDICAL APP CO LTD
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Patent Information

Application Number
CN202420554829.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-03-21
Publication Date
2025-03-18
Estimated Expiration
2034-03-21

AI Technical Summary

Technical Problem

The infusion flow rate of the existing catheter indwelling infusion needle is constrained by the inner diameter of the puncture needle tube after puncture, resulting in the inability to reach the proper flow rate. At the same time, the puncture operation is complicated, which increases the pain of the patient and the difficulty of operating by medical staff.

Method used

A catheter indwelling infusion needle with a coarse and fine needle tube on the side of the liquid permeation is designed. The puncture needle tube is in a fine front and coarse back structure, and a liquid permeation hole is set in the part of the thick-diameter needle tube. The liquid permeation hole connects the inner lumen of the puncture needle tube and the inner lumen of the hose, adding a double liquid outlet channel.

Benefits of technology

By adding the liquid-through side hole and the double-through liquid outlet channel, the infusion flow rate is improved, meeting the flow rate that is required for the hose specification, while reducing the patient's pain and operation complexity.

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Abstract

The utility model relates to a catheter indwelling infusion needle, in particular to a catheter indwelling infusion needle with a thick and thin needle tube with a liquid passing side hole, which is structurally characterized in that the liquid passing side hole is arranged on the peripheral surface of one end of a puncture needle tube close to a needle tip, and the liquid passing side hole is communicated with an inner cavity of the puncture needle tube and positioned in an inner cavity of a hose; the puncture needle tube is of a two-part structure with a thin front part and a thick rear part, the needle tip part is a small-diameter needle tube, the other part is a large-diameter needle tube, and the liquid passing side hole is formed in the circumferential surface of one end, close to the step part, of the large-diameter needle tube; a funnel-shaped cavity is formed in the middle of the hose seat, and when the needle seat drives the puncture needle tube to slide backwards in the sliding groove of the containing tube and is stopped by the stopping device, the liquid passing side hole and the step part are both located in front of the sealing piece and in the funnel-shaped cavity. The utility model has the advantages that on one hand, the time for medical staff to observe blood return is shortened, and the operation is quick and convenient; on the other hand, a liquid passing outlet channel is added, it is ensured that the infusion flow speed meets the specification, meanwhile, pain of a patient is prevented from being increased, and convenience of puncture operation is improved.
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