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BME 273 Fetal Stabilizer for Intrauterine Surgery

BME 273 Fetal Stabilizer for Intrauterine Surgery. Michael Dinh Advisor: Dr. Joseph Bruner. One of the most common debilitating neural tube defect Incomplete closure in the spinal column usually in the lower section during initial pregnancy.

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BME 273 Fetal Stabilizer for Intrauterine Surgery

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  1. BME 273Fetal Stabilizer for Intrauterine Surgery Michael Dinh Advisor: Dr. Joseph Bruner

  2. One of the most common debilitating neural tube defect Incomplete closure in the spinal column usually in the lower section during initial pregnancy. Spina Bifida affects approximately 1 out of every 1,000 newborns in the U.S Spina Bifida

  3. Degree of Spina Bifida • Spina Bifida Occulta • Spina bifida occulta is a small gap in one or more of the vertebrae. This is the mildest form of spina bifida as there is no apparent damage to the spinal cord. • Meningocele • Meninge (protective layer covering the spinal cord) protrudes through the gap in the spinal column in a form of a sac. The spinal cord itself remains intact and repairs can be made with little or no damage. Least common occuring form. • Mylemeningocele • Most severe form. This term is generally used interchangeably with spina bifida. Spinal cord itself protrudes through the gap in the spinal column.

  4. Spina Bifida Manifesta • Protrusion of spinal cord membrane, spinal cord, and nerve roots • Spinal cord exposure result in progressive damage • Most often found in the lumbo-sacral region

  5. Adverse Affect • Hydrocephalus • Accumulation of spinal fluid in brain is common among infants with spina bifida • Permanent weakness or paralysis in lower extremity below defect • Loss of bowel and bladder control due to the nerve damage

  6. Vanderbilt University • 165 cases of spina bifida repair • Age range of infants 19-30 weeks • Mean operating time is about 87 min • Ranges from 62-131 min

  7. Design Objective • Design a fetal stabilizer to assist in surgery • Hold fetus steady while providing an opening for operation

  8. Approach • Observe open repair of spina bifida • Collect fetal biometrical data • Look at similar device in handling fetus • Simpson Forceps: Used in delivery

  9. Fetal Data • 19 week old fetus • 6 inches head to end • Weight about 8.5 ounces • Abdominal Circumference about 133 mm • Width about 60 mm

  10. Device Design Top View Front View Side View

  11. Overall Length: 20 cm Depth of Paddle Arm: 6 cm Width of Paddle Arm: 4 cm Width of device: 7.5 cm Space b/w Arm Center: 6 cm Space b/w Arm bottom: 5 cm Width of opening: 5 cm Length of opening: 7 cm Side handle about 45 mm in length Device Specification

  12. Conclusion • Design stabilizes fetus using forces present • Contracting uterine wall force & fetal outward force • Facilitate in operation • No need for retaining hooks • Simple in use • Two piece device • Varying degree of adjustability for variation in fetal size

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