Re: genetic amniocentesis

From: Philippe Jeanty (Jeanty@TheFetus.net)
Fri May 24 12:07:40 2002


We use no anesthesia (since we could only numb the skin, not the myometrium). I use a plastic connector between the needle and the syringe (the technical name is a K52) since this prevents motion on the syringe to be transmitted onto the needle (and the baby). His was an old paper of mine form the early 80 on how to improve the amnio technique. I do not reinsert the stylet. This would involve extra manipulation of the needle and possibly a sideway motion during which the bevel of the needle could cut into adjacent structure. Many years ago I saw a resident do such a sideway motion (very minor in fact) and it nicked the cord. This led to an impressive bleed. I (the radiologist !!!) ordered a stat section and a few minutes later a pale but live baby was extracted. My advise is to stay in the amniotic cavity as short as possible. In my new practice where numbers are easier to follow we have not had a miscarriage in any of the amnio performed (admittedly only about 600).

-----Original Message----- From: ultrasound@obgyn.net [mailto:ultrasound@obgyn.net]On Behalf Of Daniel Margulies Sent: Thursday, May 23, 2002 4:52 PM To: Multiple recipients of list ULTRASOUND Subject: Re: genetic amniocentesis

Donīt really know In my experience when I pull out the needle ( Intrauterine transfusions, Pubs, etc.) whithout the stylet I have more complains of mother pain, Intesting to remark that I allways use local anestesia

NDM 2002

>----- Original Message -----
From: art fougner, md <evsono@pipeline.com> To: Multiple recipients of list ULTRASOUND <ultrasound@mail.medispecialty.com> Sent: Thursday, May 23, 2002 1:05 PM Subject: Re: genetic amniocentesis

> Luis -
>
> Obstet Gynecol 2001:97:42S-43S
>
> not exactly the issues you raised - in this study out of Canada they
> compared performing amnio with or without the stylet - the conclusion
> was that there was no diff in incidence of maternal cell contamination
> and that the open-needle technique was safe.
>
> art
>
> At Wed, 22 May 2002, art fougner, md wrote:
> >
> >Luis -
> >
> >i like You have found a dearth of literature on this subject - perhaps a
> >holdover from the original days of amnio - doubtless patterned after
> >lumbar puncture.
> >
> >pls let us know what You find.
> >
> >art
> >
> >At Mon, 20 May 2002, Luis Sanchez-Ramos, MD wrote:
> >>
> >>Listers:
> >>
> >>I have been performing genetic amniocentesis for many years and have
> >>always re-inserted the stylette after completing the removal of fluid.
I > >>was taught to do that and have alwyas done it. The theory behind it is
> >>that by not re-inserting the stylette, one leaves a "track" which
> >>potentially can lead to infection. Does any one have any data which
> >>documents or supports this?
> >>
> >>Thanks
> >>
> >>--
> >>Luis Sanchez-Ramos, MD
> >>
> >--
> >art fougner, md
> >ich bin ein New Yorker
> >
>
> --
> art fougner, md
> ich bin ein New Yorker
>




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