US 12,390,595 B2
Cannulas having wall strengthening features, and related systems and methods
Douglas S. Langley, Milford, CT (US); Justin Krom, Southington, CT (US); and Robert C. Reid, Fairfield, CT (US)
Assigned to INTUITIVE SURGICAL OPERATIONS, INC., Sunnyvale, CA (US)
Filed by INTUITIVE SURGICAL OPERATIONS, INC., Sunnyvale, CA (US)
Filed on Aug. 2, 2021, as Appl. No. 17/391,685.
Application 17/391,685 is a continuation of application No. 15/648,100, filed on Jul. 12, 2017, granted, now 11,097,057.
Claims priority of provisional application 62/365,807, filed on Jul. 22, 2016.
Prior Publication US 2022/0016349 A1, Jan. 20, 2022
Int. Cl. A61M 5/31 (2006.01); A61B 17/02 (2006.01); A61B 17/34 (2006.01); A61M 25/00 (2006.01); A61B 17/00 (2006.01)
CPC A61M 5/3134 (2013.01) [A61B 17/0218 (2013.01); A61B 17/3421 (2013.01); A61M 25/0021 (2013.01); A61M 25/0026 (2013.01); A61M 25/005 (2013.01); A61M 25/0052 (2013.01); A61B 2017/00902 (2013.01); A61M 2005/3118 (2013.01); A61M 2025/0042 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A cannula for guiding insertion of a medical instrument to a remote worksite of a medical procedure, comprising:
an elongate tubular structure configured to be inserted in a body wall and to maintain a passage through the body wall, the elongate tubular structure comprising:
a proximal end comprising a proximal end opening;
a distal end comprising a distal end opening;
a lateral wall defining the passage, the passage extending from the proximal end opening at the proximal end to the distal end opening at the distal end, the passage configured to permit insertion and withdrawal of the medical instrument relative to the elongate tubular structure while the passage is maintained in the body wall;
a predetermined target insertion region indicated along the lateral wall, the predetermined target insertion region indicative of a depth to which the elongate tubular structure is to be inserted in the body wall to perform the medical procedure;
a proximal portion of the lateral wall extending directly from the predetermined target insertion region to the proximal end, the proximal portion of the lateral wall comprising a first material; and
a distal portion of the lateral wall extending proximally from the distal end and through the predetermined target insertion region, the distal portion of the lateral wall comprising a second material different from the first material,
wherein the predetermined target insertion region comprises the second material that differs from the first material, and
wherein, at the predetermined target insertion region, the lateral wall has sufficient rigidity to maintain a substantially fixed shape of the cannula in an inserted position in the body wall.