Systems, devices and methods of making highly elastic suture needles for minimally invasive surgery
AssigneeEthicon, Inc.
InventorsFrank Richard Cichocki, Jr., Christophe Vailhe, Alexander M. Cannara
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AssigneeEthicon, Inc.
InventorsFrank Richard Cichocki, Jr., Christophe Vailhe, Alexander M. Cannara
Estimating the term…
An elastic suture needle for passing through a smaller cannula used in minimally invasive surgery includes an elongated body having a proximal end, a distal end, a length extending from the proximal end to the distal end, a top surface extending along the length of the elongated body, and a bottom surface extending along the length of the elongated body. The elongated body has dimensions that are calculated using the equation T/LN<(2*σ)/(πE), where T is the thickness of the elongated body, LN is the length of the neutral axis of the elongated body, σ is the yield strength of the elongated body, and E is the Young's modulus of the elongated body. The elongated body is made of stainless steels such as martensitic stainless steels, austenitic stainless steels, martensitic-aged (mar-aged) stainless steels, and stainless steels sold under the registered trademark ETHALLOY® Needle Alloy.
An elastic suture needle comprising an elongated body having a proximal end, a distal end, a length extending from the proximal end to the distal end, a top surface extending along the length of said elongated body, and a bottom surface extending along the length of said elongated body, wherein said elongated body has dimensions that are calculated using the equation T/LN<(2*σ)/π(E), where T is a thickness of said elongated body, LN is a length of a neutral axis of said elongated body, σ is a yield strength of said elongated body, and E is a Young's modulus of said elongated body,
An elastic suture needle comprising an elongated stainless steel body having a proximal end, a distal end, a length extending from the proximal end to the distal end, a flat top surface extending along the length of said elongated stainless steel body, and a flat bottom surface extending along the length of said elongated stainless steel body, wherein said elongated body has dimensions that are calculated using the equation T/LN<(2*σ)/(πE), where T is the thickness defined as a distance from said flat top surface to said flat bottom surface of said elongated stainless steel body, LN is the length of the neutral axis of said elongated stainless steel body, σ is the yield strength of said elongated stainless steel body, and E is the Young's modulus of said elongated stainless steel body,
Dependencies are inferred from the claim text.