Thread View: bionet.audiology
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Started by Neil S. Rothman, Ph.D.
Wed, 06 Jun 2007 00:45
hydrocephalus and hearing loss
Author: Neil S. Rothman, Ph.D.
Date: Wed, 06 Jun 2007 00:45
Date: Wed, 06 Jun 2007 00:45
141 lines
9231 bytes
9231 bytes
--Apple-Mail-1-920055679 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed My company is interested in diagnostic tests for hydrocephalus. We have found very little literature about the effects of hydrocephalus on ABR. I found a posting from you that appears to address this issue: Kimberly: Maybe an ABR would be helpful. If the reflex decay is from hydrocephalus the fourth ventrical is probably involved (compressing the lower pontine region where CN VII and crossed AR pathways reside). The ABR is particularly sensitive to this compression effect and may be used to monitor changes in function associated with changes in ventricular pressure. It would be real helpful if you had a pre-eppisode ABR. Maybe the neurosurgeon got one after the last shunt? Good luck David Zapala I'm not sure when this is from, but do you have a journal articles or references you could point me to? Thank you. Neil S. Rothman, Ph.D. VP Research and Development Infinite Biomedical Technologies neil@i-biomed.com --Apple-Mail-1-920055679 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=ISO-8859-1 <HTML><BODY style=3D"word-wrap: break-word; -khtml-nbsp-mode: space; = -khtml-line-break: after-white-space; ">My company is interested in = diagnostic tests for hydrocephalus.=A0 We=A0have found very little = literature about the effects of hydrocephalus on ABR.=A0 I found a = posting from you that appears to address this issue:<DIV><BR = class=3D"khtml-block-placeholder"></DIV><DIV style=3D"margin-top: 0px; = margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT = class=3D"Apple-style-span" face=3D"Courier" size=3D"3"><SPAN = class=3D"Apple-style-span" style=3D"font-size: = 13px;">Kimberly:</SPAN></FONT></DIV><DIV style=3D"margin-top: 0px; = margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal = normal normal 13px/normal Courier; min-height: 16px; "><BR></DIV><DIV = style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; = margin-left: 0px; "><FONT class=3D"Apple-style-span" face=3D"Courier" = size=3D"3"><SPAN class=3D"Apple-style-span" style=3D"font-size: = 13px;">Maybe an ABR would be helpful.</SPAN></FONT><FONT = class=3D"Apple-style-span" face=3D"Courier" size=3D"3"><SPAN = class=3D"Apple-style-span" style=3D"font-size: 13px;">=A0 = </SPAN></FONT><FONT class=3D"Apple-style-span" face=3D"Courier" = size=3D"3"><SPAN class=3D"Apple-style-span" style=3D"font-size: = 13px;">If the reflex decay is from hydrocephalus</SPAN></FONT></DIV><DIV = style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; = margin-left: 0px; "><FONT class=3D"Apple-style-span" face=3D"Courier" = size=3D"3"><SPAN class=3D"Apple-style-span" style=3D"font-size: = 13px;">the fourth ventrical is probably involved (compressing the lower = pontine</SPAN></FONT></DIV><DIV style=3D"margin-top: 0px; margin-right: = 0px; margin-bottom: 0px; margin-left: 0px; "><FONT = class=3D"Apple-style-span" face=3D"Courier" size=3D"3"><SPAN = class=3D"Apple-style-span" style=3D"font-size: 13px;">region where CN = VII and crossed AR pathways reside). </SPAN></FONT><FONT = class=3D"Apple-style-span" face=3D"Courier" size=3D"3"><SPAN = class=3D"Apple-style-span" style=3D"font-size: 13px;">=A0 = </SPAN></FONT><FONT class=3D"Apple-style-span" face=3D"Courier" = size=3D"3"><SPAN class=3D"Apple-style-span" style=3D"font-size: = 13px;">The ABR is</SPAN></FONT></DIV><DIV style=3D"margin-top: 0px; = margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT = class=3D"Apple-style-span" face=3D"Courier" size=3D"3"><SPAN = class=3D"Apple-style-span" style=3D"font-size: 13px;">particularly = sensitive to this compression effect and may be used = to</SPAN></FONT></DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; = margin-bottom: 0px; margin-left: 0px; "><FONT class=3D"Apple-style-span" = face=3D"Courier" size=3D"3"><SPAN class=3D"Apple-style-span" = style=3D"font-size: 13px;">monitor changes in function associated with = changes in ventricular</SPAN></FONT></DIV><DIV style=3D"margin-top: 0px; = margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT = class=3D"Apple-style-span" face=3D"Courier" size=3D"3"><SPAN = class=3D"Apple-style-span" style=3D"font-size: 13px;">pressure. = </SPAN></FONT><FONT class=3D"Apple-style-span" face=3D"Courier" = size=3D"3"><SPAN class=3D"Apple-style-span" style=3D"font-size: 13px;">=A0= </SPAN></FONT><FONT class=3D"Apple-style-span" face=3D"Courier" = size=3D"3"><SPAN class=3D"Apple-style-span" style=3D"font-size: = 13px;">It would be real helpful if you had a pre-eppisode = ABR.</SPAN></FONT><FONT class=3D"Apple-style-span" face=3D"Courier" = size=3D"3"><SPAN class=3D"Apple-style-span" style=3D"font-size: 13px;">=A0= </SPAN></FONT><FONT class=3D"Apple-style-span" face=3D"Courier" = size=3D"3"><SPAN class=3D"Apple-style-span" style=3D"font-size: = 13px;">Maybe</SPAN></FONT></DIV><DIV style=3D"margin-top: 0px; = margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT = class=3D"Apple-style-span" face=3D"Courier" size=3D"3"><SPAN = class=3D"Apple-style-span" style=3D"font-size: 13px;">the neurosurgeon = got one after the last shunt?</SPAN></FONT></DIV><DIV style=3D"margin-top:= 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: = normal normal normal 13px/normal Courier; min-height: 16px; = "><BR></DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; = margin-bottom: 0px; margin-left: 0px; "><FONT class=3D"Apple-style-span" = face=3D"Courier" size=3D"3"><SPAN class=3D"Apple-style-span" = style=3D"font-size: 13px;">Good luck</SPAN></FONT></DIV><DIV = style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; = margin-left: 0px; font: normal normal normal 13px/normal Courier; = min-height: 16px; "><BR></DIV><DIV style=3D"margin-top: 0px; = margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT = class=3D"Apple-style-span" face=3D"Courier" size=3D"3"><SPAN = class=3D"Apple-style-span" style=3D"font-size: 13px;">David = Zapala</SPAN></FONT></DIV><DIV style=3D"margin-top: 0px; margin-right: = 0px; margin-bottom: 0px; margin-left: 0px; "><FONT = class=3D"Apple-style-span" face=3D"Courier" size=3D"3"><SPAN = class=3D"Apple-style-span" style=3D"font-size: 13px;"><BR = class=3D"khtml-block-placeholder"></SPAN></FONT></DIV><DIV = style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; = margin-left: 0px; "><FONT class=3D"Apple-style-span" color=3D"#000000">I'm= not sure when this is from, but do you have a journal articles or = references you could point me to?</FONT></DIV><DIV style=3D"margin-top: = 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><BR = class=3D"khtml-block-placeholder"></DIV><DIV style=3D"margin-top: 0px; = margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Thank = you.</DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; = margin-bottom: 0px; margin-left: 0px; "><BR = class=3D"khtml-block-placeholder"></DIV><DIV style=3D"margin-top: 0px; = margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Neil S. = Rothman, Ph.D.</DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; = margin-bottom: 0px; margin-left: 0px; ">VP Research and = Development</DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; = margin-bottom: 0px; margin-left: 0px; ">Infinite Biomedical = Technologies</DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; = margin-bottom: 0px; margin-left: 0px; "><A = href=3D"mailto:neil@i-biomed.com">neil@i-biomed.com</A></DIV></BODY></HTML= >= --Apple-Mail-1-920055679--
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