Abstract
Although preoxygenation has been extensively studied, to our knowledge this is the first study addressing its optimal length in children, who form a high risk group for developing hypoxaemia during induction of anaesthesia. Recommended preoxygenation times in children range between 1 and 4 min, but whether one of these times maintains arterial oxygen saturation (Sao2) at an adequate level for a longer time period is unknown. This study was performed on 11 healthy children, randomly distributed into either Group 1 (1 min of preoxygenation, n = 6) or Group 2 (3 min of preoxygenation, n = 5). Sao2 was measured by pulse oximetry. While the patients were breathing room air, Sao2 was similar in both groups (97%) and rose to 100% after preoxygenation in all patients. After intravenous induction of anaesthesia and muscle relaxation, all patients became apnoeic. The time taken for the Sao2 to decrease to 90% was measured. In Group 1 this occurred in 91 s, whereas Group 2 required 144 s. Thus, a 3‐min rather than a 1‐min period of preoxygenation would appear to maintain Sao2 at a safe level for a longer time in children.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 109-111 |
| Number of pages | 3 |
| Journal | Acta Anaesthesiologica Scandinavica |
| Volume | 36 |
| Issue number | 2 |
| DOIs | |
| State | Published - Jan 1 1992 |
| Externally published | Yes |
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Keywords
- Oxygen saturation
- pediatric anesthesia
- preoxygenation
ASJC Scopus subject areas
- Anesthesiology and Pain Medicine
Cite this
Preoxygenation in children : for how long? / Videira, R. L.R.; Neto, P. P.R.; do Amaral, R. V.Gomide; Freeman, Judith (Judy).
In: Acta Anaesthesiologica Scandinavica, Vol. 36, No. 2, 01.01.1992, p. 109-111.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Preoxygenation in children
T2 - for how long?
AU - Videira, R. L.R.
AU - Neto, P. P.R.
AU - do Amaral, R. V.Gomide
AU - Freeman, Judith (Judy)
PY - 1992/1/1
Y1 - 1992/1/1
N2 - Although preoxygenation has been extensively studied, to our knowledge this is the first study addressing its optimal length in children, who form a high risk group for developing hypoxaemia during induction of anaesthesia. Recommended preoxygenation times in children range between 1 and 4 min, but whether one of these times maintains arterial oxygen saturation (Sao2) at an adequate level for a longer time period is unknown. This study was performed on 11 healthy children, randomly distributed into either Group 1 (1 min of preoxygenation, n = 6) or Group 2 (3 min of preoxygenation, n = 5). Sao2 was measured by pulse oximetry. While the patients were breathing room air, Sao2 was similar in both groups (97%) and rose to 100% after preoxygenation in all patients. After intravenous induction of anaesthesia and muscle relaxation, all patients became apnoeic. The time taken for the Sao2 to decrease to 90% was measured. In Group 1 this occurred in 91 s, whereas Group 2 required 144 s. Thus, a 3‐min rather than a 1‐min period of preoxygenation would appear to maintain Sao2 at a safe level for a longer time in children.
AB - Although preoxygenation has been extensively studied, to our knowledge this is the first study addressing its optimal length in children, who form a high risk group for developing hypoxaemia during induction of anaesthesia. Recommended preoxygenation times in children range between 1 and 4 min, but whether one of these times maintains arterial oxygen saturation (Sao2) at an adequate level for a longer time period is unknown. This study was performed on 11 healthy children, randomly distributed into either Group 1 (1 min of preoxygenation, n = 6) or Group 2 (3 min of preoxygenation, n = 5). Sao2 was measured by pulse oximetry. While the patients were breathing room air, Sao2 was similar in both groups (97%) and rose to 100% after preoxygenation in all patients. After intravenous induction of anaesthesia and muscle relaxation, all patients became apnoeic. The time taken for the Sao2 to decrease to 90% was measured. In Group 1 this occurred in 91 s, whereas Group 2 required 144 s. Thus, a 3‐min rather than a 1‐min period of preoxygenation would appear to maintain Sao2 at a safe level for a longer time in children.
KW - Oxygen saturation
KW - pediatric anesthesia
KW - preoxygenation
UR - http://www.scopus.com/inward/record.url?scp=0026593222&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0026593222&partnerID=8YFLogxK
U2 - 10.1111/j.1399-6576.1992.tb03433.x
DO - 10.1111/j.1399-6576.1992.tb03433.x
M3 - Article
C2 - 1549927
AN - SCOPUS:0026593222
VL - 36
SP - 109
EP - 111
JO - Acta Anaesthesiologica Scandinavica
JF - Acta Anaesthesiologica Scandinavica
SN - 0001-5172
IS - 2
ER -