Apparatus for verifying the position of needle tip within the in

Details Apparatus for verifying the position of needle tip within the in Apparatus for verifying the position of needle tip within the in

1987-02-19

1988-08-02

Truluck, Dalton L.

Surgery

Truss

Perineal

604 9, 604 93, 604175, 116DIG17, A61B 1900

Patent

active

047608374

ABSTRACT:
An improved injection reservoir for medically implantable devices is disclosed, the improvement means for (a) verifying that the tip of the needle is actually in the injection reservoir prior to injection; and (b) reducing damage to the needle tip during the verification procedure. In the preferred embodiment flexible needle guard provides first contact with a needle entering the reservoir. Further pressure on the needle results in movement of the needle guard causing brushes attached thereto to slide against a roughened surface housed within the reservoir causing a mechanical vibration which can be either felt with the fingers via transmission up the needle or heard with a stethoscope placed on the skin in the vicinity of the reservoir. The surface of the flexible needle is coated with a layer of hard biocompatible elastomer to further reduce damage to the needle tip during position verification.

REFERENCES:
patent: 4557722 (1985-12-01), Harris

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