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Surgical Suture Delivery System. By: Sarah Hembree, Ryan Ruehl, Matt Larson Project Advisor: Dr. Raul Guzman. Personnel in OR. Surgeon Anesthesiologist Scrub Nurse Circulating Nurse. Tasks of the Circulating Nurse Call family of patient

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Surgical suture delivery system

Surgical Suture Delivery System

By: Sarah Hembree, Ryan Ruehl, Matt Larson

Project Advisor: Dr. Raul Guzman


Personnel in OR

  • Surgeon

  • Anesthesiologist

  • Scrub Nurse

  • Circulating Nurse

  • Tasks of the Circulating Nurse

  • Call family of patient

  • Obtains and sets up all instruments used during surgery

  • Documents entire surgery


Project justification
Project Justification

  • Cost Effective

    • Less TIME spent waiting in the operating room

    • Fewer sutures wasted

  • Reduced work load for the circulating nurse


Project goal
Project Goal

  • To design a device that delivers different types of sutures from their packages to the sterile environment of the operating table for use during surgery


Dr guzman s prototype

High maintenance

Non-economical

Can open all types

Dispenses in a sterile manner

Dr. Guzman’s Prototype


Proposed suture package separation techniques

Vacuum Method – it sucks

Thermal Method – its hot

Friction Method – no lubrication required

Crimp Method – inspired by 80’s hair

Cutting Method – sharp, very sharp

Velcro Method – yeah velcro

Electrostatic Method – its shocking

Proposed Suture Package Separation Techniques



The sutures
The Sutures

  • Aluminum and plastic wrappers; up to 12 different manufactured types!

  • Requires up to 2 lbs of force to open up the non-sterile package


Prototype suture cassette
Prototype: Suture Cassette

  • Holds 6 different types

  • Each compartment designed to hold 10-15 sutures

  • Spring tension keeps the sutures pressed against the outer wall

  • Rotated by a servo motor

  • Easy to refill


Force calculations
Force Calculations

Spring Constant calculated to be 58.37 N/m

Sum of Forces of packet in cassette is 4.45 N

Cf of Plexiglas is 0.21

Maximum force to remove suture from cassette is 0.9345 N.


Vacuum method
Vacuum Method

Centrifugal Blower

  • 24 V Brushless Motor

  • Maximum Flow 50 CFM

Courtesy of: http://calmip.cict.fr:8010/fluent/fluent5/tg/html/node235.htm



Microprocessor control
Microprocessor Control

  • BASIC Stamp II

    • fully programmable I/O pins to directly interface TTL-level devices and connect to non-TTL devices

  • controls and processes input

  • controls timing and switching of motors and solenoids

  • controls display


Future work

Future Work

Continue building device

Program the microprocessor

Prepare for Final Poster Session


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