{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,4]],"date-time":"2026-08-04T04:42:23Z","timestamp":1785818543507,"version":"3.56.0"},"reference-count":18,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2005,11,18]],"date-time":"2005-11-18T00:00:00Z","timestamp":1132272000000},"content-version":"vor","delay-in-days":4857,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Pediatric Pulmonology"],"published-print":{"date-parts":[[1992,8]]},"abstract":"Abstract<\/jats:title>To determine whether the addition of air flow and O2<\/jats:sub> saturation (Sa) channels improves sensitivity of the pneumogram in identifying cardiorespiratory pattern abnormalities, 2\u2010and 4\u2010channel pneumograms (PG\u20102 and PG\u20104) were simultaneously recorded in 91 consecutive infants. Forty\u2010one infants (45%) had cardiorespiratory symptoms, and 50 were asymptomatic. Pneumograms were considered abnormal for any of the following: apnea \u2267 20 seconds, heart rate < 80 bpm for gt; 5 seconds in preterm and < 60 bpm in full\u2010term infants (bradycardia), shorter apnea with bradycardia or desaturation, periodic breathing gt; 7% of total sleep time in preterm and gt; 4% in full\u2010term infants, or Sa < 85% for gt; 5 seconds. Both recordings were normal in 72% of infants and abnormal in 24%. In only 4% were the PG\u20104 abnormal when the PG\u20102 were normal, in all instances due to minimum Sa levels of 77\u201384% for 5\u201319 seconds associated with central apnea of intermediate duration (three infants) or with mixed apnea. The difference in frequency of abnormal results between the PG\u20102 and PG\u20104 recordings was not statistically significant (X2<\/jats:sup>). In conclusion, although PG\u20104 do increase the scope of physiological information obtained in infants with cardiorespiratory events, this short\u2010term study does not establish whether this increase results in any long\u2010term benefits. Further, at least in this number and these types of at\u2010risk infants, PG\u20104 do not improve the sensitivity of cardiorespiratory recordings for detecting abnormalities. \u00a9 1992 Wiley\u2010Liss, Inc.<\/jats:p>","DOI":"10.1002\/ppul.1950130413","type":"journal-article","created":{"date-parts":[[2007,3,6]],"date-time":"2007-03-06T17:05:22Z","timestamp":1173200722000},"page":"245-249","source":"Crossref","is-referenced-by-count":6,"title":["Comparison of 2\u2010channel and 4\u2010channel pneumograms"],"prefix":"10.1002","volume":"13","author":[{"given":"Ibrahim","family":"Abdulhamid","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pierre A.","family":"Vauthy","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bruce A.","family":"Barnett","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"David 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