Suturing Techniques

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Self-Disarming Suture Needle

• Team SWAGE Briar Duffy, Angela Heppner,
  Elizabeth Nee, Jeffrey Phillips
• February 11, 2002
• Biomedical Engineering Department
• University of Wisconsin-Madison

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Presentation Overview

• Demand for a safer needle
• Existing situation
• Supporting data
• JABE 200
• What is it?
• How does it work?

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Not an average sewing needle . . .

• Anatomy of suture needles
• Variety of circumstances
• Locations
• Personnel
• Wounds
• Techniques

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Background Information

• 30 of physicians sharp object injuries
• Left palm most common site of injury
• 96 of needles were contaminated
• Disease transmission HIV, Hepatitis C
• Risk of disease transmission low, cost and
  anxiety high

HIV
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Existing Technology

• Blunt-tipped needles
• Puncture resistant gloves
• Patents for safer needles
• None are in widespread use
• Demand still exists

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JABE 200
The revolution in surgical safety begins now!
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Inside the JABE

• Outer metal sheath with bilateral windows
• Fluid filled balloon-like trigger
• Mobile inner needle tip attached to one end of
  balloon

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Benefits

• User must consciously activate the tip
• No technique change necessary
• No additional equipment
• Manufacturing techniques already in use
• Small diameter tubing
• Small diameter balloons

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Fusion of Two Technologies
Micro-machined metals
Small-diameter expandable tubing
The JABE needle
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Key Specifications

• Ability to deter needle sticks
• Closes wounds securely
• Biocompatible
• Reliable
• Feasible to manufacture
• Easy to use

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This device may directly save lives on a daily
basis
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Questions?
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References

• Corrin, L. A. 10 October 2001. Skin
  Structure. http//www.geocities.com/ukhsgroup/sk
  instructure.htm.
• Gimble Glove Company, LLC. 15 October 2001.
  Product information. http//www.gimbelglove.co
  m/product.htm .
• Haughton, Victor, personal communication, 8
  October 2001.
• International Health Care Worker Safety Center .
  9 October 2001. Sharp object injury reports by
  category. http//hsc.virginia.edu/epinet/soi.htm
  l.
• Trott, A.T. Wounds and Lacerations Emergency
  Care and Closure. 2nd ed. Mosby-Year Book, St.
  Louis. 1997.
• Walshaw, J. (15 October 2001) Tertiary
  StructureFibrous and Structural Proteins.
  Available http//www.cryst.bbk.ac.uk/PPS95/course
  /7_tertiary/struc.html

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Suturing Techniques

• Proper handling and choice of suturing needles
  and tools
• Needle varieties
• Wound-edge eversion
• Interrupted suture stitch
• Mattress suture stitch

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Properties of Skin

• Heterogeneous, layered structure
• Epidermis prevents water loss
• Dermis provides most of bulk and strength
• Collagen most abundant material in dermis
• Cellular elements only 10-20 tissue volume