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Biomedical subjects

M Hack

Publications and source records attributed to M Hack.

At least 109 records · Page 6Linked to original sources
PubMed1981

Rehospitalization of the very-low-birth-weight infant. A continuum of perinatal and environmental morbidity.

To evaluate ongoing morbidity, a prospective follow-up study was undertaken of the frequency and causes of rehospitalization of very-low-birth-weight infants (less than 1,500 g) during the first year of life. In 1977, 90 very-low-birth-weight infants were discharged after an average of 62 days' hospitalization. Thirty required rehospitalization on 51 occasions during the first year, for reasons including continuing care of chronic conditions related to the initial neonatal hospitalization (16), respiratory and other infections (14), inguinal herniorrhaphy (13), caretaking disorders (five), and other causes (three). Infants at highest risk for rehospitalization included those with chronic conditions and/or those with poor neurodevelopmental outcomes. These data reconfirm the continuing toll of perinatal morbidity among very-low-birth-weight infants and emphasize the medical and social responsibility for a systematic program of follow-up for these high-risk infants.

Adolescent↗
PubMed1981

Brainstem evoked response audiometry in the premature infant population.

Auditory brainstem response (ABR) audiometry was performed on 76 non-selected premature infants from 32 to 40 weeks conceptional age. Follow-up ABR was completed on 45 infants at 4 months of age. The results were compared to data from selected, relatively low risk infants of comparable age. No significant differences were seen between the two groups, which indicates that normative data from non-selected premature infants can be obtained to identify ABR abnormality.

Audiometry↗
PubMed1981

Brainstem-evoked response audiometry: normative data from the preterm infant.

Brainstem-evoked response audiometry (BERA) was performed on 40 preterm infants who had low neonatal risk scores. Mean latencies for waves I and V were obtained from four age-groups, 33-34, 35-36, 37-38 and 39-40 weeks conceptional age. The results indicate that BERA is a valuable and reliable tool in assessment of auditory function in the preterm infant. Also for classification of abnormality it is recommended that 2 standard deviations from the mean latency of wave V be used.

Audiometry↗
PubMed1981

State of awakeness during visual fixation in preterm infants.

To demonstrate the presence of discriminable awake states in preterm infants, facial behaviors and visual fixation to a single patterned stimulus were recorded. Five healthy preterm infants born at a mean of 29 weeks' gestation were followed from 30 to 35 weeks' postmenstrual age. Behaviors (eye openness, movements, mouthing, and vocalizations) were recorded simultaneously with visual fixation measured by the corneal reflection technique. Test time was determined by the duration of time the infant remained awake before crying or closing eyes. The presence of both quiet awakeness and drowsiness was demonstrated. Younger infants spent more time in drowsiness, whereas older infants had more quiet awakeness. Visual pattern fixation was observed as early as 30 weeks. Fixation time increased with increasing postmenstrual age. More fixation was observed during quiet awakeness than during drowsiness.

Eye Movements↗
PubMed1980

Changing trends of neonatal and postneonatal deaths in very-low-birth-weight infants.

Advances in perinatal care have resulted in a decline in mortality of very-low-birth-weight infants (< 1.5 kilograms) and also in an extension of the mortality period. To determine the current relevance of neonatal mortality results as indicators of outcome, all deaths among 427 very-low-birth-weight infants admitted during 1975-1977 were documented. A total of 145 infants died; 90 of the deaths (62%) occurred during the early neonatal period (0 to 6 days), 35 (24%) in the late neonatal period (7 to 27 days), and 20 (14%) in the postneonatal period. Death in 17 of the 20 postneonatal losses was due to neonatal complications of prematurity, and 16 of the 20 deaths occurred during the initial hospitalization. The postponement of these deaths to the postneonatal period has important epidemiologic implications and indicates a need for a reconsideration of accepted reporting mechanisms for infants of very low birth weight.

Female↗
PubMed1980

Footwear.

Explore the source record for details and available documents.

Shoes↗
PubMed1978

Hazards of amniocentesis: an unidentifiable fragment.

A 38-year-old woman had amniocentesis performed for advanced maternal age. The karyotype of the cultured amniotic fluid cells showed a minute fragment in all cells analyzed, 47,XY+Fg. The fragment could not be identified. For medical reasons the pregnancy had to be terminated at 34 weeks. Both skin and blood cultures from the aborted fetus showed a 47,XY,21+ karyotype.

Abortion, Induced↗
PubMed1977

Neonatal pattern vision: a predictor of future mental performance?

The visual fixation responses of 33 high-risk neonates to patterned stimuli were rated as normal, suspect, or abnormal in an attempt to predict future intellectual performance. For comparison purposes, a neurologic examination was aslo administered. Follow-up studies based on autopsies and neurologic and psychological testing agreed with the neonatal visual preference ratings in 27 cases, but with the neurologic examination ratings in only 22 cases. This preliminary study suggests that neonatal visual testing is a promising technique for evaluating brain integrity in the newborn period.

Child, Preschool↗
PubMed1976

Neonatal respiratory distress following elective delivery. A preventable disease?

Twelve per cent of all infants with respiratory distress admitted to our neonatal intensive-care unit from November, 1973 to April, 1974, were born after elective intervention (15 cesarean sections and four vaginal inductions). All were white and 18/19 were private compared to yearly admissions of white (56 per cent) and private (57 per cent). Eighteen of 19 were admitted from the region via the transport service. Mean birth weight was 2.69 kilograms, with 18 infants over 2 kilograms. Pediatric gestational age from a physical and neurological evaluation ranged from 32 to 39 weeks (mean 36.2 weeks) in contrast to obstetric dating which ranged from 38 to 44 weeks (mean 39 weeks). The obstetric dating was 3 or more weeks greater than the pediatric age in 11 infants. Pulmonary disease included transient tachypnea (5) and respiratory distress syndrome (14). No prior documentation of pulmonary maturity had been obtained in any of these infants. Mean hospitalization was 23 days (range 1 to 140), with estimated costs of $3,421 per baby. Two infants died. Respiratory distress following elective delivery remains a potent source of on-going perinatal morbidity. Regional programs must direct increased educational efforts to eliminate this preventable disease.

Birth Weight↗
PubMed1976

Development of attention in preterm infants.

The quality of the awake state and attention in preterm infants has been evaluated by rating indices of attention such as widening of the eye, type of fixation, brightening, scanning, and cessation of sucking measured during visual fixation of patterns. Twenty-six infants ranging from 28 to 32 weeks' gestation at birth (mean, 31 weeks) were tested from one to four weeks postnatally until 36 weeks' gestation. Indices of attention were rated on a scale of 4 with an optimal mean index of 4. A progressive increase in behaviors associated with fixation of visual stimuli has been shown from 32 to 36 weeks of conceptual age. Mean scores ranged from 0.7 at 31 weeks' gestation to 1.8 at 34 weeks' and 2.7 at 36 weeks' gestation. The possibility therefore exists that by as early as 31 to 32 weeks from conception the human brain may be capable of waking states and thus able to process some sensory stimulation.rease in behaviors associated with fixation of visual stimuli has been shown from 32 to 36 weeks of conceptual age. Mean scores ranged from 0.7 at 31 weeks' gestation to 1.8 at 34 weeks' and 2.7 at 36 weeks' gestation. The possibility therefore exists that by as early as 31 to 32 weeks from conception the human brain may be capable of waking states and thus able to process some sensory stimulation.

Analysis of Variance↗