Surgical Suture Delivery System By: Sarah Hembree, Ryan Ruehl, Matt Larson Project Advisor: Dr. Raul...
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Transcript of Surgical Suture Delivery System By: Sarah Hembree, Ryan Ruehl, Matt Larson Project Advisor: Dr. Raul...
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