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Re: IVF TV Oocyte Retrieval From: James Smeltzer (James.Smeltzer@wellstar.org) Mon Aug 22 10:18:35 2005 Messages sorted by: [ date ][ thread ][ subject ][ author ] Previous message: Alessandro Gubbini: "IVF TV Oocyte Retrieval" Maybe in reply to: Alessandro Gubbini: "IVF TV Oocyte Retrieval" Hi, Average penile length at tumescence is 12.5 cm +/- 2 cm among most populations studied and 15 cm among normal Germans. Assuming that normal vaginas accomodate these, minimum design length to accomodate most normal vaginal lengths would be about 17 to 18 cm. The probe needs to be of sufficient length to "trap" the ovary against the sacrum, where it is easier to puncture. You must allow for some length outside the vagina but permit normal needles to be used with some needle outside the sheath. One typical needle is 33 cm http://www.attiehmedico.com/pages/Companies/wallace/oocyte_recovery_systems.htm, and may extend 2 cm into the ovary, allow a space of 2 cm, and thus design lenth would be 18 cm to 24 cm with the needle sheath being longer. The extra needle sheath length is for sterility. The needle is placed after to particular follicle is targeted with sheath and probe. The oocyte is aspirated into the needle but not out of the needle, the needle removed and the oocyte ejected. Sheath is longer than probe to facilitate sterile technique and finding the sheath. An Iowa type trumpet may facilitate this. It has been a very long time since I learned this and taught it to my endocrinologist colleagues who now are way beyond my technique. Hire one as a consultant to try your prototype. Jim >>> alessandro.gubbini@sti-ultrasound.com 8/21/2005 8:56:02 AM >>> > Our company is in the midst of redesigning an EV probe and I have a > question regarding length of both probe shaft and biopsy guides. > There have have been several 2nd hand reports that for IVF TV Oocyte > retrieval our transducer is too short. Normally we receive input from > our customers (system manufacturers), but in this case we are building > a probe for an OEM that has no clinical experience with the proceedure > either. > > The current probe has a length of 132mm/5.2" from tip to the point > where is starts to widen to meet the handle. The biopsy guide extends > back 125mm/4.9" to the point where the needle is inserted. As a > comparison an Acuson EV8C4 has a length of 165mm/6.5" and the needle > guide extends back 142mm/5.6" > > Questions: > 1. What is the maximum insertion length into vaginal canal necessary > for the proceedure? > 2. Are there any reasons for extra length of shaft? (cultural, to keep > hand further from vagina for instance) > 3. Is needle introduced to the guide before or after probe is in > vaginal canal? > > Please feel free to add any other details about the proceedure you > feel are relevant. I'm also curious whether the proceedure is > generally done by one person (operates probe and needle) or several > (sonographer operates probe, physician operates needle). > > Thanks in advance for your insights. >>>>>>>>>>>>> Confidentiality Disclaimer <<<<<<<<<<<<<<<< This email and any files transmitted with it may contain confidential and /or proprietary information in the possession of WellStar Health System, Inc. ("WellStar") and is intended only for the individual or entity to whom addressed. This email may contain information that is held to be privileged, confidential and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient, you are hereby notified that any unauthorized access, dissemination, distribution or copying of any information from this email is strictly prohibited, and may subject you to criminal and/or civil liability. If you have received this email in error, please notify the sender by reply email and then delete this email and its attachments from your computer. Thank you. ================================================================ Previous message: Alessandro Gubbini: "IVF TV Oocyte Retrieval" Maybe in reply to: Alessandro Gubbini: "IVF TV Oocyte Retrieval"

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