Evaluation of the Ohmeda 3700 pulse oximeter.

Warley, A; Mitchell, Jere H.; Stradling, J

doi:10.1136/thx.42.11.892

Cited by 66 publications

(19 citation statements)

References 6 publications

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“…The apparatus records the lowest percentage transcutaneous oxygen saturation (S A o 2 ) detected over successive 12 second time intervals for eight hours (2400 data points), and has been validated over oxygen saturation ranges of 60–98% 6. The data were analysed to calculate the overnight minimum S A o 2 , mean S A o 2 , dip frequency (a dip was defined as a fall in S A o 2 ∼4%), and the percentage of recording time spent with an S A o 2 of ⩽ 90%.…”

Section: Methodsmentioning

confidence: 99%

Cognitive impairment in heart failure with Cheyne-Stokes respiration

Staniforth

Kinnear²,

Cowley³

2001

Heart

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Objectives-To document the degree of cognitive impairment in stable heart failure, and to determine its relation to the presence of Cheyne-Stokes respiration during sleep. Subjects-104 heart failure patients and 21 healthy normal volunteers. Methods-Overnight oximetry was used (previously validated as a screening tool for Cheyne-Stokes respiration in heart failure). Cognitive function was assessed using a battery of neuropsychological tests. Left ventricular function was assessed by echocardiography. Results-Heart failure patients performed worse than the healthy volunteers in tests that measured vigilance. Reaction times were 48% slower (0.89 (0.03) s v 0.60 (0.05) s; p < 0.005) and they hit twice as many obstacles on the Steer Clear simulator (75 (6.4) v 33 (4.6); p < 0.005). Cognitive impairment within the heart failure group was unrelated to either the presence of Cheyne-Stokes respiration, the degree of left ventricular dysfunction, or indices of nocturnal oxygenation. Conclusions-Vigilance was impaired in heart failure but this did not appear to be related to the presence of Cheyne-Stokes respiration during sleep. Impaired vigilance as measured on the Steer Clear test has been associated with an increased risk of motor vehicle accidents. The issue of fitness to drive in heart failure requires further attention. (Heart 2001;85:18-22)

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Section: Methodsmentioning

confidence: 99%

Cognitive impairment in heart failure with Cheyne-Stokes respiration

Staniforth

Kinnear²,

Cowley³

2001

Heart

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“…5,15,[17][18][19][20][21] Iyer et al 5 reported no difference between hand and foot probe sites in infants less than 3 months of age undergoing cardiac surgery with cardiopulmonary bypass. Warley et al 18 described finger and toe response time to be proportionately longer than ear probe response in normal subjects and attributed this finding to increased lung to periphery circulation times. Severinghaus and Naifeh 19 found the response times at the ear or finger for step desaturation to be longer than for step resaturation.…”

Section: Discussionmentioning

confidence: 99%

Accuracy of pulse oximeter readings from probe placement on newborn wrist and ankle

et al. 2011

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Objective: To compare the accuracy of pulse oximetry oxygen saturation (SpO 2 ) measured on the wrist compared with the ipsilateral palm, and SpO 2 measured on the ankle compared with the ipsilateral sole.Study Design: In this prospective observational study, neonates admitted to the neonatal intensive care unit were enrolled. We recorded SpO 2 (Masimo Radical-7 pulse oximeter) detected at the palm and ipsilateral wrist initially, then at 30 s, and at 1 min, and we repeated the same procedure over the sole and ipsilateral ankle. We recorded the time to obtain the SpO 2 readings from all these sites. Regression analysis was performed to determine the relationship between paired SpO 2 measurements. The mean difference (bias) and standard deviation of the paired SpO 2 differences (precision) were calculated (Bland-Altman plots).Result: A total of 150 patients (birth weight 2381±1020 g, gestational age 34.3 ± 4.3 weeks, median postnatal age 3.5 days (25th-75th percentile 1-16 days)) were enrolled. There was a good correlation between SpO 2 measured at the palm versus the wrist (r ¼ 0.95, P<0.001 (right); r ¼ 0.97, P< 0.001 (left)) and between SpO 2 measured at the sole versus the ankle (r ¼ 0.92, P<0.001 (right); r ¼ 0.91, P<0.001 (left)). There was also a good agreement between paired SpO 2 measurements from these sites. The bias and precision for SpO 2 at the right palm and right wrist was 0.08 ± 0.94% and for the left palm and left wrist 0.22 ± 0.87%. Similarly, the bias and precision for SpO 2 at the right sole and right ankle was À0.03 ± 0.93% and for the left sole and left ankle was À0.01 ± 0.93%. Conclusion:Our results show that the wrist and ankle can be used as alternative sites to measure SpO 2 in newborn infants in place of the routinely used palm or sole.

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“…Oxygen saturation was recorded continuously using an Ohmeda 3700e pulse oximeter and transferred for subsequent computer analysis. The overnight baseline Sa02 and the number of dips in SaO: >4% from the baseline level and lasting longer than 10 s was calculated and expressed per hour of recording [16], The use of oxi meters to detect and monitor hypoxaemic episodes has been vali dated in previous studies [17,18]. The presence of sleep was docu mented by one of the investigators (N.T.).…”

Section: Introductionmentioning

confidence: 99%

Sleep Problems in Multiple Sclerosis

et al. 1994

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Twenty-eight consecutive patients with multiple sclerosis (MS) were clinically evaluated to determine the presence of sleep-related disorders. There were 12 males and 16 females aged between 22 and 67 with disability ranging between 1.5 and 8.5 on Kurtzke extended disability status score (EDSS). Fifteen patients (54%) reported sleep-related problems. These included difficulties initiating sleep and/or frequent awakenings due to spasms or discomfort in the legs (8 patients), difficulty in initiating or maintaining sleep (3), habitual snoring (4) and nocturia (1). All-night oximetry was performed and the tracings analysed for the number of dips in oxygen saturation (SaO₂) or more than 4%. Three patients showed significant sleep-related oxygen desaturation (>5 dips of >4% SaO₂/h). Subsequent polysomnography performed in 2 of the 3 patients with significant oxygen desaturation confirmed the presence of sleep apnoea. MRI analysis of brain stem regions showed abnormalities in 20/22 cases. The 3 patients showing nocturnal oxygen desaturation had MRI brain stem lesions, but their locations were variable and their general appearance not different from that seen in the 17 without sleep apnoea. Sleep disturbance in MS is common but poorly recognised. It is usually due to leg spasms, pain, immobility, nocturia or medication. It is much less commonly associated with nocturnal respiratory insufficiency.

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Evaluation of the Ohmeda 3700 pulse oximeter.

Cited by 66 publications

References 6 publications

Cognitive impairment in heart failure with Cheyne-Stokes respiration

Cognitive impairment in heart failure with Cheyne-Stokes respiration

Accuracy of pulse oximeter readings from probe placement on newborn wrist and ankle

Sleep Problems in Multiple Sclerosis

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