Trans-cervical infusion pipette, and method

A - Human Necessities – 61 – D

Patent

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Details

A61D 7/00 (2006.01) A61D 19/02 (2006.01)

Patent

CA 2213252

Pipettes for infusing the uterus are disclosed, each pipettes being generally comprised of a proximal end, a mid-section and an enlarged distal tip. The proximal end has a coupling portion for engagement with a fluid-expressing syringe. Distal tips disclosed are of two primary shapes, one having a generally hemispherical distal zone of expanding diameter in a distal to proximal direction; and, another having a generally frusto-conical distal zone, with a similarly expanding diameter. Each tip also has a frusto-conical proximal zone, decreasing in diameter in a distal to proximal direction. One embodiment includes a generally cylindrical medial zone between its distal and proximal zones. The method of the invention includes using a guide hand in the anal canal above the cervical area to align the enlarged distal end of the pipette with the cervix; driving the pipette through the cervix until a decrease in resistance is sensed; and, then pulling back on the pipette such that its enlarged distal tip effects a sealing action against the rim of the inner cervical opening. Once the fluid is infused into the uterus, the pipette is withdrawn.

L'invention concerne une pipette d'injection dans l'utérus, constituée généralement d'une extrémité proximale, d'une section médiane et d'une extrémité distale élargie. L'extrémité proximale a une zone d'accouplement avec une seringue d'injection pour fluide. On décrit des extrémités distales offrant deux configurations primaires: l'une à zone distale globalement hémisphérique ayant un diamètre qui augmente dans le sens distal-proximal, et l'autre à zone distale globalement tronconique, ayant également un diamètre qui augmente. Chaque extrémité a en outre une zone proximale tronconique, ayant un diamètre qui diminue dans le sens distal-proximal. Selon une variante, les zones distale et proximale sont séparées par une zone médiane globalement cylindrique. Le procédé consiste à utiliser une main de guidage dans le canal anal au-dessus de la zone utérine afin d'aligner l'extrémité distale élargie de la pipette avec le col; à conduire la pipette dans le passage du col jusqu'à sentir une diminution de résistance; et, ensuite, à tirer la pipette en arrière de sorte que l'extrémité distale éloignée vienne obturer l'ouverture interne du col en s'appuyant contre celui-ci. Enfin, la pipette est retirée après injection du fluide dans l'utérus.

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