1. Mollie Lange, Kuya Takami
Auto Suture Device for Nasal Surgery
Team:
Tim Pearce, Peter Ma,
Mollie Lange, Kuya Takami
BME 200/300
October 2006

2. Client: Dr. Ben Marcus Division of Otolaryngology Advisor: Prof. Kristyn S. Masters Department of Biomedical Engineering

3. Outline Problem Statement Background Motivation Design Requirements
Proposed Designs
Design Matrix
Future Work

4. Problem Statement
Develop a device which will automatically deploy a suture to a specific region of the nose.
Applicable to two of the most common nasal surgeries.

5. Background Rhinoplasty Septoplasty modify the shape and size of a nose
corrects any deformation of nasal septum

6. Background Suture Fine threads joining two surfaces
Introduced by the ancient Egyptians
Stapler
Caesarean sections and intestinal surgery
Staples: different sizes and materials

7. Motivation A currently simple but tedious procedure
Save both time and money
Increase quality of the suture

8. Requirements
The accuracy and reliability of the device must be comparable to the current standard procedure
Surgeon and client safety must be maintained
Cost per device must not exceed $300

9. Autosuture Varying patterns Curved or linear needle
Mimic current methods used by surgeons

10. Pros and Cons Widely accepted by surgeons
Ensure the safety of the patient
Different types of suturing material – non-absorbable or absorbable
Very difficult to build
Not adjustable to different sizes

11. Medical Glue Several different types
Absorption and drying time both vary
Can be ordered in large quantities
Gaining popularity among surgeons

12. Pros and Cons Success in medical studies Quick and easy to apply
Long shelf life
Must be coupled with nasal packing (risk of TSS)
Risky to patient

13. Surgical Stapler Similar in function to a paper stapler
Becoming commonplace in operations
Non-absorbable & absorbable staples

14. Pros and Cons Sterile Safe Accurate Easy to modify Simpler mechanism
Does not replicate current technique

15. Criteria (item weight)
Design Matrix
Criteria (item weight)
Autosuture
Design
Medical Glue
Surgical Stapler
Sterilizable (3)
5x3 = 15
Patient/Surgeon Safety (3)
2x3 = 6
4x3 = 12
Accuracy (3)
3x3 = 9
Strength of Suture (2)
4x2 = 8
Adjustable device (2)
3x2 = 6
Patient Comfort (2)
5x2 = 10
Time needed (2)
Cost (1)
3x1 = 3
5x1 = 5
4x1 = 4
Shelf Life (1)
Attractiveness (1)
Total (Max score = 100) 83 76 87

16. Future Work Modify existing device Some unchangeable features
Size constraints
Testing
Obtain additional samples

17. References United States Patent & Trademark Office US Surgical
Journal of the American Society of Medicine
PubMed Online
Toxic Shock Syndrome Information Service