Medical device and process for manufacturing
AssigneeRoche Diabetes Care, Inc.
InventorHerbert Harttig
Life of this patent
Estimating the term…
Abstract
This disclosure concerns a medical device and a method for its production, wherein the device comprises a cannula having an elongated hollow shaft and a sharp tip provided at a distal end of the shaft, wherein the shaft is formed as a bent part from a sheet material and confines an interior passage which has a lateral slit opening, and wherein the shaft has at least one longitudinal pre-bending channel provided in the sheet material, wherein the thickness of the sheet material is reduced along the pre-bending channel and a sidewall of the shaft is folded over the pre-bending channel.
Claims13
A cannula for subcutaneous insertion of a sensor or an infusion set, comprising:
- an elongated hollow shaft formed from bent sheet material and defining an interior passage which has a lateral slit opening extending along a longitudinal direction of the shaft;
- the shaft having at least one longitudinal pre-bending channel in the sheet material, wherein the thickness of the sheet material is reduced along the at least one pre-bending channel, and a sidewall of the shaft is folded over the at least one pre-bending channel;
- and
- a sharp tip provided at a distal end of the shaft, wherein the tip comprises a flat part of the sheet material bounded by straight cutting edges, each cutting edge being tapered, wherein the cutting edges laterally protrude distally beyond the edge section beginning in an area surrounding the tip and terminating in an area distal of the at least one pre-bending channel.
A cannula for subcutaneous insertion of a sensor or an infusion set, comprising:
- an elongated hollow shaft formed from bent sheet material and defining an interior passage which has a lateral slit opening extending along a longitudinal direction of the shaft;
- the shaft having at least one longitudinal pre-bending channel in the sheet material, wherein the thickness of the sheet material is reduced along the at least one pre-bending channel, and a sidewall of the shaft is folded over the at least one pre-bending channel;
- a sharp tip provided at a distal end of the shaft, wherein the tip comprises a flat part of the sheet material bounded by cutting edges, each cutting edge being tapered, wherein the cutting edges laterally protrude distally beyond the edge section beginning in an area surrounding the tip and terminating in an area distal of the at least one pre-bending channel;
- and
- a cutout in the folded sidewall of the shaft;
- wherein, the at least one pre-bending channel has a distal section which ends at a location spaced from the tip.
Dependencies are inferred from the claim text.