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US 6,673,043 B1Granted
Cannulation device and apparatus
AssigneeLevram Medical Devices, Ltd.
InventorAmir Landesberg
Life of this patent
Estimating the term…
Abstract
An incision in a ventricle wall is spread without applying axial force to the ventricle wall by inserting an array of pins and then spreading that array while a cannula is inserted along the track formed by the pins.
Claims20
A cannulation device comprising:
- a handle;
- a plurality of pins in a circular array projecting from an end of said handle;
- an actuator on said handle operatively connected with said pins for spreading said array from a narrow configuration in which said pins are insertable through an incision in tissue in which cannulation is to be effected into a wide position in which said tissue is radially and elastically spread at said incision;
- and
- a cannula in said handle insertable through said array in said wide position for anchoring in said tissue by contraction of said tissue around said incision, said pins being formed as generally linear shanks on respective wire springs, each of said wire springs having a pivot portion parallel to the respective shank but offset laterally therefrom and a connecting portion between the respective shank and the respective pivot portion, said actuator including a sleeve provided with formations engaging said wire springs and rotating said connecting portions about axes of said pivot portions to radially displace said shanks between said positions.
2 more elements
A ventricular cannulation device comprising:
- a plurality of pins forming a narrow circular array and insertable in an incision in a ventricle wall;
- a cannula in line with said array of pins;
- and
- an actuator for simultaneously radially spreading said array to spread said incision and advancing said cannula through said array along a track formed within said array of pins, thereby lodging said cannula in the ventricle wall, said pins being formed as generally linear shanks on respective wire springs, each of said wire springs having a pivot portion parallel to the respective shank but offset laterally therefrom and a connecting portion between the respective shank and the respective pivot portion, said actuator including a sleeve provided with formations engaging said wire springs and rotating said connecting portions about axes of said pivot portions to radially displace said shanks.
1 more element
A cannulation method comprising the steps of:
- (a) forming an incision in tissue into which a cannula is to be introduced;
- (b) inserting into said incision a narrow array of pins formed as generally linear shanks on respective wire springs, each of said wire springs having a pivot portion parallel to the respective shank but offset laterally therefrom and a connecting portion between the respective shank and the respective pivot portion;
- (c) spreading said pins into a wide array by engaging the wire springs with formations on an actuator sleeve to rotate the connecting portions about axes of said pivot portions to thereby radially expand said incision elastically and form an opening without axially stressing the tissue;
- (d) inserting a cannula into said opening within said wide array of pins thereby plugging said opening;
- and
- (e) withdrawing said pins from said tissue and leaving said cannula in said opening whereby said cannula is retained in said tissue by elastic contraction of said tissue around said cannula.
3 more elements
Dependencies are inferred from the claim text.