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Obesity Surgery

Catheter-emplacement-apparatus

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Catheter emplacement apparatus

Details

Inventors: Sinko, George E.; Jones, Charles A.;
Assignee: Gesco International, Inc. (San Antonio, TX)
Primary Examiner: Swiatek; Robert P.
Assistant Examiner: Manahan; Todd E.
Attorney, Agent or Firm: Cox & Smith Incorporated

An apparatus for inserting a catheter into a selected vein and to a selected position within such vein comprises a tubular sheath mountable in surrounding relation to a percutaneous needle to permit the distal end of the tubular sheath to enter the vein penetrated by the needle. The tubular sheath is rigidly bonded in the bore of a hub portion of an operating element and has a pair of diametrically opposed, longitudinal score lines. The hub element is longitudinally divided by longitudinal slots aligned with the sheath score lines except for two thin walled integral connecting sections having score lines aligned with the sheath score lines. A pair of diametrically opposed, manually graspable wing portions are integrally formed on the hub element intermediate the hub score lines to permit the longitudinal severance of the hub and sheath to remove same from a catheter traversing the bores of the hub element and sheath to enter the selected vein after the needle is removed.

DETAILED DESCRIPTION A catheter emplacement apparatus embodying this invention comprises an elongated tubular sheath formed of flexible plastic material.
Such sheath is provided with a pair of diametrically opposed, axially extending score lines extending the full length of the sheath.
The sheath is mounted in surrounding relationship to a percutaneous needle, with only the sharpened tip end of the needle projecting from the sheath.
Thus, the penetration of the patient's skin and selected vein by the needle will permit the distal end of the sheath to be moved forwardly over the needle and into the penetrated vein.
The proximal end of the sheath is bonded to a plastic operating element which has a central hub portion defining a central aperture in which the proximal end of the sheath is rigidly bonded.
The proximal end of the aperture in the hub portion is provided with a conical configuration which functions as a convenient guide for insertion of a catheter into the sheath after removal of the needle.
A pair of longitudinal slots are formed in the hub portion in overlying relation respectively to the score lines in the sheath.
A pair of diametrically opposed, manually graspable radial projections or wings are integrally formed on the proximal end of the hub portion and are located intermediate the two score lines provided in the sheath.
Moreover, the wall portion of the hub portion connected to the intermediate radial projections are formed as thin walled conical segments, with external surfaces generally parallel to the enlarged conical opening provided for insertion of the catheter.
This results in two thin walled conical segments being the only material preventing axial separation of the hub, longitudinally aligned with the score lines in the sheath, and each of these conical segments is provided with a score line aligned with the adjacent sheath score line.
After withdrawal of the needle from the selected vein and insertion of the catheter through the tubular sheath to a desired location within the selected vein, the introducer sheath element is moved rearwardly relative to the inserted catheter

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