Surgical Suture Delivery Surgical Suture Delivery SystemSystem

By: Sarah Hembree, Ryan Ruehl, Matt Larson

Project Advisor: Dr. Raul Guzman

•Surgeon

•Anesthesiologist

•Scrub Nurse

•Circulating Nurse

Personnel in OR

Tasks of the Circulating Nurse

• Call family of patient

• Obtains and sets up all instruments used during surgery

• Documents entire surgery

Project JustificationProject Justification

Cost Effective– Less TIME spent

waiting in the operating room

– Fewer sutures wasted

Reduced work load for the circulating nurse

Project GoalProject 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

S e l e c t s p ac k ag efr o m c as s e t t e

O p e n s fo i l o rp l as t i c p ac k ag e

D i s p e n s e ss t e r i l e c o n t e n t s

D i s p o s e sp ac k ag e

Dr. Guzman’s PrototypeDr. Guzman’s Prototype

High maintenance Non-economical

Can open all types Dispenses in a sterile

manner

Proposed Suture Package Proposed Suture Package Separation TechniquesSeparation 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

SSDS PrototypeSSDS Prototype

The SuturesThe 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

  

Minimums Maximums

seal 0.5 cm/0.187" 0.7 cm/0.25 "

flap 1.6 cm/0.63" 2.5 cm/0.984"

length 12.1 cm/4.76" 15.5 cm/6.1"

width 5.7 cm/2.25" 6.3 cm/2.5"

thickness 1/16" 3/16"

Prototype: Suture CassettePrototype: 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 CalculationsForce 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 MethodVacuum Method

Centrifugal Blower 24 V Brushless Motor Maximum Flow 50 CFM

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

SSDS SSDS ProcessProcess

S e l e c t s p ac k ag efr o m c as s e t t e

O p e n s fo i l o rp l as t i c p ac k ag e

D i s p o s e sp ac k ag e

D i s p e n s e ss t e r i l e c o n t e n t s

I NPUT

C A S S ETTER O TA TI O N

S TARTS UCTION FAN

S TA R T S U C TIO NB ELT

TU R N O N B ELTS O LEN O ID

TU R NS O LEN O ID O FFEN D P A S S ES

S EN S O R

S TOPS UCTION FAN

S TO P S U C TIO NB ELTS

y e s

EN D C LEA R SS EN S O R

S TARTS UCTION FAN

S TA R T S U C TIO NB ELT

TUR N O NV A L V E

S TA R TTI M I NG

O V ER ?

S TO PS UC TO N FA N

S TO P S U C TIO NB ELTS

y e s

y e s

n o

n o

n o

Microprocessor ControlMicroprocessor 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 WorkFuture Work

Continue building deviceProgram the microprocessorPrepare for Final Poster Session