US 8,409,232 B2Granted

Surgical instrument assembly

AssigneeThomas M. Preskop

InventorsRudolph Muto, Thomas M. Prezkop

Life of this patent

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Abstract

A surgical instrument assembly configurable for performing a dermatotomy in a percutaneous procedure and further configurable for performing cuts in open surgery includes a pointed scalpel blade and a hollow sheath body disposed to encapsulate the pointed scalpel blade inside a longitudinal instrument cavity to protect a user. The hollow sheath body is supported for longitudinal translation with respect to the scalpel blade. The hollow sheath may be positioned and locked at a first position to completely encapsulate the scalpel blade inside the instrument cavity for safe handling. The hollow sheath body is movable to second and third positions with different lengths of the surgical instrument extending out through a front face of the hollow sheath body. A compression spring biases the hollow sheath body toward the first safety position.

Claims20

Dependent claims

A surgical instrument having a longitudinal axis, a front end and a back end comprising:

an instrument holder extending along the longitudinal axis having an instrument holding portion disposed at the front end, a back shaft portion disposed at the back end, and a front shaft portion extending between the instrument holding portion and the back shaft portion;
a scalpel blade fixedly attached to the instrument holding portion;
a hollow sheath body comprising an annular wall surrounding a second longitudinal cavity for encapsulating the scalpel blade therein and for interfacing with the front shaft portion to movably support the hollow sheath body for longitudinal translation with respect to the front shaft portion and the scalpel blade;
a handle actuator comprising an annular wall surrounding a first longitudinal cavity for movably receiving the hollow sheath body therein and for interfacing with the back shaft portion to support the handle actuator with respect to the back shaft portion and the hollow sheath body;
and wherein said front end comprises a guide wire receiving groove for receiving a wire therein, said groove being an indentation extending into said front end.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/433,403Filed 29 Mar 2012 · continuation
Priority: 18 Dec 2007
Published: US 2012/0232571 A113 Sep 2012
Granted: 2 Apr 2013
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

A61B 17/3211
Incision instruments: surgical scalpels, knives; Accessories therefor
A61B 17/32093
Incision instruments: for skin incisions
A61B 2017/320052
Surgical cutting instruments: guides for cutting instruments
A61B 2017/32113
Surgical scalpels, knives; Accessories therefor: with extendable or retractable guard or blade

Family

Application12/002,941Parent of this continuation · filed 18 Dec 2007
US 2012/0232571 A1Pre-grant publication · published 13 Sep 2012
US 8,167,897 B2Parent of this continuation
US 2009/0157110 A1Published application
US 8,409,232 B2This patent

From the US filing history. Foreign family members aren’t listed.