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In 36 pregnancies with normal liquor volume, stable intra\u2010amniotic pressure (IAP, range 1\u201314 mmHg) increased with gestation (<jats:italic>r<\/jats:italic>=0\u00b748, <jats:italic>p<\/jats:italic>&lt;0\u00b701). In pregnancies complicated by severe oligohydramnios, IAP was \u2264 1 mm Hg and rose to normal levels with saline amnioinfusion. Raised IAP (range 17\u201326 mm Hg), found in pregnancies with gross polyhydramnios, fell with drainage of amniotic fluid. Subtraction manometry was used to determine supra\u2010amniotic pressure within the intervillus space, umbilical vein, umbilical artery, abdominal and thoracic cavities, and the urinary tract in normal and\/or pathological fetuses. Low intravesical and intrapelvicalyceal pressures (median 6\u00b75, range 2\u201310 mmHg) were noted in fetuses with obstructive uropathies. Intrauterine subtraction manometry appears to be a useful tool in the understanding of fetal pathophysiology and may be of clinical benefit in the therapeutic drainage and infusion of amniotic fluid and in the assessment of certain fetal disease states.<\/jats:p>","DOI":"10.1002\/pd.1970090404","type":"journal-article","created":{"date-parts":[[2007,3,4]],"date-time":"2007-03-04T02:43:58Z","timestamp":1172976238000},"page":"243-254","source":"Crossref","is-referenced-by-count":53,"title":["Intrauterine manometry: Technique and application to fetal pathology"],"prefix":"10.1002","volume":"9","author":[{"given":"Umberto","family":"Nicolini","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nicholas M.","family":"Fisk","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"David G.","family":"Talbert","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Charles H.","family":"Rodeck","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Neil K.","family":"Kochenour","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pantaleo","family":"Greco","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Corinne","family":"Hubinont","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Joaquin","family":"Santolaya","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2005,11,21]]},"reference":[{"key":"e_1_2_1_2_1","first-page":"392","article-title":"Transabdominal amniocentesis in hydramnios","volume":"17","author":"Brandt A. 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Fisk N. M. Rodeck C. H. Talbert D. G. Wigglesworth J. S.(1989a).Low amniotic pressure in oligohydramnios; is this the cause of pulmonary \u2010 hypoplasia?Submitted for publication.","DOI":"10.1016\/0002-9378(89)90641-8"},{"key":"e_1_2_1_16_1","doi-asserted-by":"crossref","unstructured":"Nicolini U. Talbert D. G. Fisk N. M. Rodeck C. H.(1989b). Pathophysiology of pressure changes during intrauterine transfusion Am. J. Obstet. Gynecol. in press.","DOI":"10.1016\/0002-9378(89)90176-2"},{"key":"e_1_2_1_17_1","doi-asserted-by":"publisher","DOI":"10.1002\/pd.1970080906"},{"key":"e_1_2_1_18_1","doi-asserted-by":"publisher","DOI":"10.1016\/0002-9378(70)90055-4"},{"key":"e_1_2_1_19_1","doi-asserted-by":"crossref","first-page":"257","DOI":"10.1152\/ajplegacy.1958.193.2.257","article-title":"Pressures in umbilical arteries and veins of the fetal lamb, in utero","volume":"193","author":"Reynolds S. R. M.","year":"1958","journal-title":"Am. J. 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