Abstract：
:Experimental middle ear barotrauma was studied morphologically. White guinea pigs were placed in an experimental hyperbaric chamber, and middle ear barotrauma was created by increasing the pressure in the hyperbaric chamber from 1 atmosphere absolute (ATA) to 2 ATA using pure oxygen, maintaining the pressure at 2 ATA for 10 minutes, then again reducing the pressure to 1 ATA. Selected experimental animals were decapitated immediately after, one day after, one week after, or weeks after pressure loading, and their middle ears were examined by a light microscope (LM), a scanning electron microscope (SEM) and a transmission electron microscope (TEM). Hemorrhaging in the tympanic cavity immediately after pressure exposure was apparent even macroscopically. LM also revealed evidence of submucous hemorrhage. Submucous edema was seen in the "one week after" cases. SEM showed a minor loss of cilia in some ciliated cells just after the experiment. In nonciliated cells, the terminal web was somewhat indistinct in the "one week after" cases. TEM also indicated a minor loss of cilia in some ciliated cells in "one day after" cases as well as apparent vacuoles within the cells. These findings suggest that although trauma during compression is more marked than during decompression, recovery from this damage progressed with time.
journal_name
Nagoya J Med Scijournal_title
Nagoya journal of medical scienceauthors
Sato S,Yokoi H,Fukuta S,Kozuka M,Yanagita Nsubject
Has Abstractpub_date
1997-11-01 00:00:00pages
109-17issue
3-4eissn
0027-7622issn
2186-3326journal_volume
60pub_type
杂志文章,评审abstract：:In endovascular coil embolization for intracranial aneurysms, as coils are filled in the aneurysm and the stage of procedure is advanced, the force to push forward the coil delivery wire (insertion force) increases. However, the coil insertion force that interventionist's felt at his fingertips does not directly refle...
journal_title：Nagoya journal of medical science
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journal_title：Nagoya journal of medical science
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journal_title：Nagoya journal of medical science
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更新日期：1994-03-01 00:00:00
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journal_title：Nagoya journal of medical science
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journal_title：Nagoya journal of medical science
pub_type： 杂志文章
doi：
更新日期：1994-05-01 00:00:00
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journal_title：Nagoya journal of medical science
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journal_title：Nagoya journal of medical science
pub_type： 杂志文章
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journal_title：Nagoya journal of medical science
pub_type： 杂志文章,评审
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