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Biomedical subjects

C Acebo

Publications and source records attributed to C Acebo.

22 records · Page 2Linked to original sources
PubMed1991

Sleep and apnea in the elderly: reliability and validity of 24-hour recordings in the home.

Two studies investigated the reliability and validity of measures of sleep and apnea using the home sleep monitoring system (HMS), which requires no instrumentation of the subject. From a pressure-sensitive pad on the subject's bed, signals from respiration and motility are recorded. These are scored for sleep and the occurrence of apneas, and the following measures are obtained: time in bed, total sleep time, number of awakenings from sleep, waking after sleep onset, sleep efficiency, and number of apneas. Overnight recordings of 14 adults were made concurrently with polysomnographic recordings in the New Haven Sleep Disorders Center. Significant agreement was found for each sleep measure and the apnea index. Four weekly 24-h recordings were made of eight elderly women, aged 62 to 90, in the home. There were significant individual differences and measurement reliability for each sleep measure and number of apneas. Some of the elderly showed highly episodic sleep patterns; and three of them showed high and variable apneas over the four weeks. These studies indicate the potential of the HMS for characterizing sleep in the elderly from nonintrusive, naturalistic observations in the home.

Adult↗
PubMed1991

Premature infants seek rhythmic stimulation, and the experience facilitates neurobehavioral development.

This was a clinical trials study of self-regulation of rhythmic stimulation in preterm infants. Infants were enrolled in three regional hospitals and followed in four outlying hospitals. Forty-five premature infants, 22 males and 23 females, enrolled at 29-33 weeks conceptional age (CA) received in the isolette either a "breathing" teddy bear (set to breathe at one-half the infant's quiet sleep respiration rate) or a nonbreathing bear. Using time-lapse videorecording at a 60:1 ratio, subjects were recorded for 3 days at the beginning of the Intervention period and again for 3 days, 2 weeks later. After discharge from the hospital, the sleep of the subjects was monitored in the home for a 24-hour period on weeks 1, 2, 3, 4, and 5 after expected date of birth (postterm). Infants with a breathing bear spent more time in contact with the bear, and increased their contact over the two weeks. Postterm, the "breathing bear babies" showed more quiet sleep and a greater increase in quiet sleep over weeks. The results indicate that premature infants ("prematures") are capable of organizing their motility to express a preference for rhythmic stimulation, and that the experience facilitates neurobehavioral development.

Acoustic Stimulation↗
PubMed1983

Infant crying and stability in the mother-infant relationship: a systems analysis.

Mother-infant interaction was studied using a general systems theory framework. 20 mother-infant pairs were observed in their home for a 7-hour period when the infants were 2, 3, 4, and 5 weeks of age. A measurement procedure was devised to assess, for each pair, the consistency over weeks in their allocation of time to 4 interactional contexts that make up the day: feeding, changing or bathing, social attention, and baby alone. The measure was called an Interactional Stability Score. Construct validity for this measure was investigated based on our hypothesis that high interactional stability would be strongly linked to low levels of crying during social attention. This hypothesis was confirmed. The results are interpreted within a general systems theory perspective--namely, that this measure of interactional stability is an empirical indicator of the degree of equilibrium within the relationship, at the level of patterning of interactional contexts. High stability scores represent consistency in allocation of time to the 4 contexts over weeks and not a rigidity in sequencing of these contexts, and thus appeared to reflect a dynamic process of mutual constraints on the behaviors of both partners.

Child Development↗