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Auto-suture device for nasal surgery

Auto-suture device for nasal surgery. Client: Dr. Benjamin Marcus Department of Otolaryngology Advisor: Professor Tyler Mark Yarmarkovich~Leader Joseph Cabelka~Communicator Jennifer Wager~BSAC Therese Rollmann~BWIG. Problem Statement.

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Auto-suture device for nasal surgery

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  1. Auto-suture device for nasal surgery Client: Dr. Benjamin Marcus Department of Otolaryngology Advisor: Professor Tyler Mark Yarmarkovich~Leader Joseph Cabelka~Communicator Jennifer Wager~BSAC Therese Rollmann~BWIG

  2. Problem Statement • Develop device to reduce suturing process in nasal surgery (septoplasty) • Reduce OR costs ($60/min) • The device should mimic the procedure currently used by the surgeon

  3. Design Constraints • Reduce suturing time (less than 10 minutes) • Autoclavable or one-time use • Dimensions must conform to the nose • Cost up to $300 for disposable, $1500 for multiple use

  4. Background: Nose • Septum: cartilage dividing nose into two chambers; 3-5 mm wide • Cartilage Young’s Modulus=10MPa • Mucous membrane lining each side of septum • Nostril width: 10mm-15mm • Flexible

  5. Background: Septoplasty • Deviated septum • Septum is severely shifted from midline • Causes difficulty breathing, sleeping

  6. Background: Septoplasty • Incision made to expose caudal end of septum • Cartilage excised to prevent overriding • Cartilage swung into alignment

  7. Background: Suture • Sutures • Close incision • Strong, non-toxic polymer fiber • Absorbable • Purse-string suture pattern • Continuous • Circular • Inverting

  8. Current Device • Autosuture devices currently available for bowel surgery • Large scale • Endostitch • Automatic Needle Passer

  9. Materials • Autoclavable or one-time use • Light weight and easy to handle • Durable if multiple use

  10. Design I: Mechanical Needle Passer • Needle passed with pulley system • Locked into place by notched edges

  11. Pros Mimics procedure Manipulated by surgeon Adjustable number of sutures Cons Many small parts Difficult to manufacture Difficult to autoclave Requires dexterity Design I: Mechanical Needle Passer

  12. Design II: Clamp • Clamped on either side of the septum • Suture is manually inserted through raised septum

  13. Pros Easy to manufacture Can be disposable Safe Cons Not adjustable to size of nose Not automatic Design II

  14. Design III: Magnetic Needle Passer • Magnetic field generated by coils secures needle • Switch controls magnetic field activation

  15. Pros Simple mechanism Easy to manipulate Mimics procedure Adjustable number of sutures Cons Magnetic field must generate sufficient force to hold the needle in place Size Design III: Magnetic Needle Passer

  16. Design Matrix

  17. Future Work • Discuss design options with client • Build prototype • Test device for suture time and ease of use

  18. References • Autosuture. 29 January 2007<http://www.autosuture.com>. • Azom. 6 March 2007<http://www.azom.com/details.asp?ArticleID=1141>. • Cornell. 27 February 2007<http://www.mae.cornell.edu/PDF/mcv3/JB.36.1069.pdf>. • Fact Sheet. 2 March 2007.<http://www.entnet.org/healthinfo/sinus/deviated-septum.cfm>. • Kortenbach, Juergen Andrew . “Automatic needle-passer suturing instrument .” Patent no. 5,814,054. 1998. • Lore, John. An Atlas of Head and Neck Surgery. 1988:Philadelphia. • Modern Plastics. 6 March 2007<http://www.modernplastics.com/april05/wdtubing.html>. • Septoplasty. 27 February 2007<http://emedicine.com/ent/topic128.htm>. • Septum. 7 March 2007 <http://z.about.com/d/p/440/e/f/7166.jpg>.

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