System for attenuating pain during bone marrow aspiration and me

Details System for attenuating pain during bone marrow aspiration and me System for attenuating pain during bone marrow aspiration and me

1998-05-07

2000-12-12

O'Connor, Cary

Surgery

Diagnostic testing

Sampling nonliquid body material

604170, 607 99, A61B 1000

Patent

active

061591637

ABSTRACT:
A biopsy sampling system and method for aspirating bone marrow and bone cores from a patient with minimal or no perceived pain to the patient. The system includes a bone aspiration needle assembly having a handle and an electrically conductive needle shaft and an electrical nerve stimulator (ENS) which supplies a current of adjustable intensity to the needle shaft. Thus, when the aspirating needle is inserted into the bone marrow cavity of the patient, the stimulator is activated to anesthetize the nerves in the vicinity of the aspiration permitting the extraction to commence with little or no increased pain to the patient. A nonconducting insulating shaft is also disclosed to be placed on the needle shaft in order direct the ENS current to the area of the shaft that can most efficiently anesthetize the pain conducting nerves, i.e. to the tip of the needle shaft.

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