Title:
SAFE AND OPEN INDWELLING NEEDLE PROVIDED WITH FORWARDS-EXTENDING NEEDLE BAR
Document Type and Number:
WIPO Patent Application WO/2018/209498
Kind Code:
A1
Abstract:
A safe and open indwelling needle provided with a forwards-extending needle bar. A duct seat of the indwelling needle is provided with a front inner cavity and a rear inner cavity. A duct is inserted in the front inner cavity. A needle seat comprises a front section and a rear section. The front section is sleeved in the rear inner cavity of the duct seat, and the rear section of the needle seat is exposed outside the duct seat. The rear end of a needle tube (3.3) is inserted in the needle seat, and an inner cavity hole of the needle tube (3.3) communicates with a blood return cavity of the rear section of the needle seat. After the needle tube (3.3) sequentially passes through the inner cavity of the duct seat and the front end of the duct, a needle tip is exposed out of the pointed end of the duct. The front section of the needle seat is of a long rod shape, and extends from the rear end surface of the duct seat to or near to the joint portion of the front inner cavity and the rear inner cavity of the duct seat, and the insertion depth is greater than the three quarter of the length of the rear inner cavity of the duct seat. The indwelling needle has the following advantages: the needle tube (3.3) has lower requirements on the material strength and the manufacturing processes, is convenient to use, has a shorter protective jacket, is convenient to operate, has a simple structure, and is convenient to manufacture.
Inventors:
CHEN YONGXI (CN)
Application Number:
PCT/CN2017/084346
Publication Date:
November 22, 2018
Filing Date:
May 15, 2017
Export Citation:
Assignee:
FUJIAN BESTWAY MEDICAL POLYMER CORP (CN)
International Classes:
A61M5/14; A61M5/158; A61M5/32; A61M25/06
Foreign References:
| CN204446805U | 2015-07-08 | |||
| CN105561434A | 2016-05-11 | |||
| CN1803209A | 2006-07-19 | |||
| CN106310446A | 2017-01-11 | |||
| CN203989265U | 2014-12-10 | |||
| CN106362239A | 2017-02-01 | |||
| US20080167623A1 | 2008-07-10 |
Attorney, Agent or Firm:
FUZHOU ZHANHUI PATENT AGENCY (GENERAL PARTNERSHIP) (CN)
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