Medical instrument for measuring depth of fastener hold in bone

Details Medical instrument for measuring depth of fastener hold in bone Medical instrument for measuring depth of fastener hold in bone

1990-07-31

1991-05-07

Hafer, Robert A.

Surgery

Instruments

Orthopedic instrumentation

33512, A61F 504, A61B 100

Patent

active

050133187

ABSTRACT:
A medical instrument for measuring depth of fastener hole in bone. The depth gauge has a scale tube which fits into fastener hole in bone. The zero index of scale tube expands exclusively in radial dimension to a diameter greater than the hole diameter, affording a positive stop for the zero index, thus insuring precise alignment of scale zero index with edge of hole in distal bone wall. A sliding scale marker is frictionally mounted to scale tube, affording a record of the measurement.

REFERENCES:
patent: 1528273 (1925-03-01), Shwe
patent: 1804064 (1931-05-01), Sison
patent: 1856295 (1932-05-01), Sovatkin
patent: 1953498 (1934-04-01), Pieri
patent: 3740779 (1973-06-01), Rubricuis
patent: 4294264 (1981-10-01), Fischell

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