The first liver biopsy has been performed by Adolf Bingel in the year 1923. Since then, biopsy needles started to be fully developed and in the year 1938. Irving Silverman developed a bifid biopsy needle which is considered the "father" of all current tru-cut type biopsy needles. In 1958. Giorgio Menghini developed a vacuum assisted biopsy needle. Nowdays therapy choice is based according to biopsy results.
Semi-automatic tru-cut biopsy system
Cutting needle tip. Semi-automatic Tru-cut type system with, 2 depth penetrations (10-20mm), safety device. Depth stopper and depth marks on the cannula. Stylet connected to the system with notch to keep the specimen in, whistle and penetrating tip. Echogenic marker: inner
The procedure is considered only as a help guide. Each physician should evaluate the procedure here described according to its experience and type of need. Is a single use device. Zamar disclaims any liability for reuse of this device.
1. Load PM/PMO biopsy needle by pulling back hard on the plunger until a firm click is felt.
2. With stylet fully retracted (specimen notch com pletely covered by cannula) insert needle proximal to area to be sampled. Warning: be careful not to press plunger until needle is inserted into the lesion to biopsy.
3. Move plunger with thumb to first stop to advance the stylet and expose the specimen notch. Press the plunger past stop with thumb, automatically triggering the cannula to close, trapping a specimen in the sample notch.
4. Draw needle out. Pull back on prolonger to recock the spring. Push plunger to first stop exposing the specimen from notch. Remove tissue specimen from notch in stylet. Be careful not to push plunger after first stop during this step.