Preoxygenation of Pregnant and Nonpregnant Women in the Head-Up Versus Supine Position
The influence of preoxygenation in the supine (n = 10) versus the 45° head-up (n = 10) position on the duration of apnea leading to a decrease in arterial oxygen saturation to 95%, as monitored by pulse oximetry, was investigated in 20 women undergoing elective cesarean section at term of pregnancy....
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| Veröffentlicht in: | Anesthesia and analgesia 1992-11, Vol.75 (5), p.757-759 |
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| container_title | Anesthesia and analgesia |
| container_volume | 75 |
| creator | Baraka, Anis S. Hanna, Myrna T. Jabbour, Samar I. Nawfal, Maud F. Sibai, Abla A. N. Yazbeck, Vanda G. Khoury, Nawal I. Karam, Karam S. |
| description | The influence of preoxygenation in the supine (n = 10) versus the 45° head-up (n = 10) position on the duration of apnea leading to a decrease in arterial oxygen saturation to 95%, as monitored by pulse oximetry, was investigated in 20 women undergoing elective cesarean section at term of pregnancy. The results were compared with those obtained in a control group of 20 nonpregnant women. In the supine position, the average time to desaturation to 95% was significantly shorter in the pregnant group (173 ± 4.8 s [mean ± SD]) than in the control group of nonpregnant women (243 ± 7.4 s). Using the head-up position resulted in an increase in the desaturation time in the nonpregnant group (331 ± 7.2 s) but had no significant effect in the pregnant group (156 ± 2.8 s). We conclude that pregnant women desaturate their arterial blood of oxygen more rapidly than do nonpregnant women. Furthermore, the head-up position extends the duration of apnea that can take place before desaturation occurs in nonpregnant patients. |
| doi_str_mv | 10.1213/00000539-199211000-00018 |
| format | Article |
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Using the head-up position resulted in an increase in the desaturation time in the nonpregnant group (331 ± 7.2 s) but had no significant effect in the pregnant group (156 ± 2.8 s). We conclude that pregnant women desaturate their arterial blood of oxygen more rapidly than do nonpregnant women. Furthermore, the head-up position extends the duration of apnea that can take place before desaturation occurs in nonpregnant patients.</description><identifier>ISSN: 0003-2999</identifier><identifier>EISSN: 1526-7598</identifier><identifier>DOI: 10.1213/00000539-199211000-00018</identifier><identifier>PMID: 1416130</identifier><identifier>CODEN: AACRAT</identifier><language>eng</language><publisher>Hagerstown, MD: International Anesthesia Research Society</publisher><subject>Abdominal surgery. Urology. Gynecology. Obstetrics ; Adult ; Anesthesia ; Anesthesia depending on type of surgery ; Anesthesia. Intensive care medicine. Transfusions. 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N.</creatorcontrib><creatorcontrib>Yazbeck, Vanda G.</creatorcontrib><creatorcontrib>Khoury, Nawal I.</creatorcontrib><creatorcontrib>Karam, Karam S.</creatorcontrib><title>Preoxygenation of Pregnant and Nonpregnant Women in the Head-Up Versus Supine Position</title><title>Anesthesia and analgesia</title><addtitle>Anesth Analg</addtitle><description>The influence of preoxygenation in the supine (n = 10) versus the 45° head-up (n = 10) position on the duration of apnea leading to a decrease in arterial oxygen saturation to 95%, as monitored by pulse oximetry, was investigated in 20 women undergoing elective cesarean section at term of pregnancy. The results were compared with those obtained in a control group of 20 nonpregnant women. In the supine position, the average time to desaturation to 95% was significantly shorter in the pregnant group (173 ± 4.8 s [mean ± SD]) than in the control group of nonpregnant women (243 ± 7.4 s). Using the head-up position resulted in an increase in the desaturation time in the nonpregnant group (331 ± 7.2 s) but had no significant effect in the pregnant group (156 ± 2.8 s). We conclude that pregnant women desaturate their arterial blood of oxygen more rapidly than do nonpregnant women. Furthermore, the head-up position extends the duration of apnea that can take place before desaturation occurs in nonpregnant patients.</description><subject>Abdominal surgery. Urology. Gynecology. Obstetrics</subject><subject>Adult</subject><subject>Anesthesia</subject><subject>Anesthesia depending on type of surgery</subject><subject>Anesthesia. Intensive care medicine. Transfusions. Cell therapy and gene therapy</subject><subject>Apnea - metabolism</subject><subject>Biological and medical sciences</subject><subject>Female</subject><subject>Humans</subject><subject>Medical sciences</subject><subject>Oxygen - metabolism</subject><subject>Posture</subject><subject>Pregnancy - metabolism</subject><subject>Supine Position</subject><subject>Time Factors</subject><issn>0003-2999</issn><issn>1526-7598</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1992</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp1kVFP2zAQgC001JWOnzDJD9PeAj7bSezHCQ2KhABpgz1aTnKh2VI7sxMV_v1c2rInbFnW3X13lj4TQoGdAQdxzrYrFzoDrTlACrJ0QB2ROeS8yMpcqw9knnIi41rrj-Qkxt9bhKliRmYgoQDB5uTxPqB_fnlCZ8fOO-pbmjJPzrqRWtfQW--GQ_zLr9HRztFxhXSJtskeBvqIIU6R_piGziG997HbzvlEjlvbRzzd3wvycPn958Uyu7m7ur74dpPVQkmV5dCUspCc5TrnwFAVgLUGUUvettByUVRSMK5kyRtWV6ooyzztqrGgc1m1YkG-7uYOwf-dMI5m3cUa-9469FM0peDJT6kSqHZgHXyMAVszhG5tw4sBZrZKzUGpeVNqXpWm1s_7N6Zqjc3_xp3DVP-yr9tY274N1tVdfMOkkGkOT5jcYRvfj0nan37aYDArtP24Mu99qPgHeQaLuw</recordid><startdate>199211</startdate><enddate>199211</enddate><creator>Baraka, Anis S.</creator><creator>Hanna, Myrna T.</creator><creator>Jabbour, Samar I.</creator><creator>Nawfal, Maud F.</creator><creator>Sibai, Abla A. N.</creator><creator>Yazbeck, Vanda G.</creator><creator>Khoury, Nawal I.</creator><creator>Karam, Karam S.</creator><general>International Anesthesia Research Society</general><general>Lippincott</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>199211</creationdate><title>Preoxygenation of Pregnant and Nonpregnant Women in the Head-Up Versus Supine Position</title><author>Baraka, Anis S. ; Hanna, Myrna T. ; Jabbour, Samar I. ; Nawfal, Maud F. ; Sibai, Abla A. N. ; Yazbeck, Vanda G. ; Khoury, Nawal I. ; Karam, Karam S.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3848-51d746420595210e861ec913c42ff1f236b43028472d0cb86775757bda1954bf3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1992</creationdate><topic>Abdominal surgery. Urology. Gynecology. Obstetrics</topic><topic>Adult</topic><topic>Anesthesia</topic><topic>Anesthesia depending on type of surgery</topic><topic>Anesthesia. Intensive care medicine. Transfusions. Cell therapy and gene therapy</topic><topic>Apnea - metabolism</topic><topic>Biological and medical sciences</topic><topic>Female</topic><topic>Humans</topic><topic>Medical sciences</topic><topic>Oxygen - metabolism</topic><topic>Posture</topic><topic>Pregnancy - metabolism</topic><topic>Supine Position</topic><topic>Time Factors</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Baraka, Anis S.</creatorcontrib><creatorcontrib>Hanna, Myrna T.</creatorcontrib><creatorcontrib>Jabbour, Samar I.</creatorcontrib><creatorcontrib>Nawfal, Maud F.</creatorcontrib><creatorcontrib>Sibai, Abla A. 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N.</au><au>Yazbeck, Vanda G.</au><au>Khoury, Nawal I.</au><au>Karam, Karam S.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Preoxygenation of Pregnant and Nonpregnant Women in the Head-Up Versus Supine Position</atitle><jtitle>Anesthesia and analgesia</jtitle><addtitle>Anesth Analg</addtitle><date>1992-11</date><risdate>1992</risdate><volume>75</volume><issue>5</issue><spage>757</spage><epage>759</epage><pages>757-759</pages><issn>0003-2999</issn><eissn>1526-7598</eissn><coden>AACRAT</coden><abstract>The influence of preoxygenation in the supine (n = 10) versus the 45° head-up (n = 10) position on the duration of apnea leading to a decrease in arterial oxygen saturation to 95%, as monitored by pulse oximetry, was investigated in 20 women undergoing elective cesarean section at term of pregnancy. The results were compared with those obtained in a control group of 20 nonpregnant women. In the supine position, the average time to desaturation to 95% was significantly shorter in the pregnant group (173 ± 4.8 s [mean ± SD]) than in the control group of nonpregnant women (243 ± 7.4 s). Using the head-up position resulted in an increase in the desaturation time in the nonpregnant group (331 ± 7.2 s) but had no significant effect in the pregnant group (156 ± 2.8 s). We conclude that pregnant women desaturate their arterial blood of oxygen more rapidly than do nonpregnant women. Furthermore, the head-up position extends the duration of apnea that can take place before desaturation occurs in nonpregnant patients.</abstract><cop>Hagerstown, MD</cop><pub>International Anesthesia Research Society</pub><pmid>1416130</pmid><doi>10.1213/00000539-199211000-00018</doi><tpages>3</tpages></addata></record> |
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| source | MEDLINE; Journals@Ovid LWW Legacy Archive; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Journals@Ovid Complete |
| subjects | Abdominal surgery. Urology. Gynecology. Obstetrics Adult Anesthesia Anesthesia depending on type of surgery Anesthesia. Intensive care medicine. Transfusions. Cell therapy and gene therapy Apnea - metabolism Biological and medical sciences Female Humans Medical sciences Oxygen - metabolism Posture Pregnancy - metabolism Supine Position Time Factors |
| title | Preoxygenation of Pregnant and Nonpregnant Women in the Head-Up Versus Supine Position |
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