auto suture device for nasal surgery
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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

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
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
design constraints
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
background nose
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
background septoplasty
Background: Septoplasty
  • Deviated septum
    • Septum is severely shifted from midline
    • Causes difficulty breathing, sleeping
background septoplasty1
Background: Septoplasty
  • Incision made to expose caudal end of septum
  • Cartilage excised to prevent overriding
  • Cartilage swung into alignment
background suture
Background: Suture
  • Sutures
    • Close incision
    • Strong, non-toxic polymer fiber
    • Absorbable
  • Purse-string suture pattern
    • Continuous
    • Circular
    • Inverting
current device
Current Device
  • Autosuture devices currently available for bowel surgery
    • Large scale
  • Endostitch
    • Automatic Needle Passer
materials
Materials
  • Autoclavable or one-time use
  • Light weight and easy to handle
  • Durable if multiple use
design i mechanical needle passer
Design I: Mechanical Needle Passer
  • Needle passed with pulley system
  • Locked into place by notched edges
design i mechanical needle passer1
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
design ii clamp
Design II: Clamp
  • Clamped on either side of the septum
  • Suture is manually inserted through raised septum
design ii
Pros

Easy to manufacture

Can be disposable

Safe

Cons

Not adjustable to size of nose

Not automatic

Design II
design iii magnetic needle passer
Design III: Magnetic Needle Passer
  • Magnetic field generated by coils secures needle
  • Switch controls magnetic field activation
design iii magnetic needle passer1
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
future work
Future Work
  • Discuss design options with client
  • Build prototype
  • Test device for suture time and ease of use
references
References
  • Autosuture. 29 January 2007.
  • Azom. 6 March 2007.
  • Cornell. 27 February 2007.
  • Fact Sheet. 2 March 2007..
  • 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.
  • Septoplasty. 27 February 2007.
  • Septum. 7 March 2007 .
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