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Research Papers

Novel Stapling Method and Device for Nasal Surgery

[+] Author and Article Information
Ryan K. Buesseler

Department of Mechanical Engineering, Medical Devices Center, University of Minnesota, Minneapolis, MN 55414

David B. Hom

Department of Otolaryngology, University of Cincinnati, Cincinnati, OH 45229

Arthur G. Erdman

Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN 55414

J. Med. Devices 3(4), 041007 (Nov 20, 2009) (6 pages) doi:10.1115/1.4000496 History: Received March 13, 2009; Revised April 23, 2009; Published November 20, 2009; Online November 20, 2009

This paper presents the design and prototyping of a novel stapling device and method intended for—though not limited to—the nasal septal mucosa. The pistol shaped device has two long projections: one for each nostril. The internal mechanism pushes the male portion of the rivet, nearly 10 cm down one tube, where it pierces the mucosa and mates with the female portion. This is all accomplished with one grip of the handle, rotating the input handle only 30 deg. The internal mechanism was designed by solving loop equations for a five-bar, dual-slider single degree-of-freedom mechanism. Components were then rapid prototyped before the eventual functional prototype was completed.

Copyright © 2009 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Basic concept of suturing device, showing relative motion of input to output links

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Figure 2

Avery Dennison Mark 3 clothing tag tool, courtesy of www.ctsusa.com

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Figure 3

Watt-II and Stephenson-III chains

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Figure 4

Avery Dennison Mark 3 seven-bar kinematic design

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Figure 5

Stephenson-III modified with sliding joints: link 2 is input and link 6 is output

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Figure 6

Various graphical solutions manufactured with rapid prototyping

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Figure 7

Diagram for solving loop equations for Stephenson-III

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Figure 8

Thickness of tissue and direction of force needed

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Figure 9

Fastened rivet and washer through septal tissue

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Figure 10

Rivet tube (top) and washer tube (bottom)

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Figure 11

Cam surface and tube locations before motion

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Figure 12

Cam surface and tube locations after motion

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Figure 13

Completed nasal stapler

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Figure 14

Internal view of completed nasal stapler

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Figure 15

Selection of prototypes created with graphical synthesis

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Figure 16

Output slider location as a function of input angle

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Figure 17

Relative velocities, dX/dθ versus input angle

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Figure 18

Mechanical advantage as a function of input angle

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Figure 19

Kinematic variations of the same mechanism for the nasal stapler

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