Hautdurchblutung und Thermoregulation bei neugeborenen Kindern

Brück, K.; Brück, Monika; Lemtis, H

doi:10.1007/bf00364521

Cited by 25 publications

(5 citation statements)

References 17 publications

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“…The further studies of Kidd, Levison, Gemmel, Aharon & Swyer (1966) using a strain-gauge plethysmograph have since shown that limb blood flow varies two-to-threefold with change in environmental temperature. These observations are in good accord with the earlier findings of Briick, Bruck & Lemtis (1957, 1958) and Briick (1961, who measured the insulation provided by the skin and superficial tissues to externally applied heat and showed that even premature babies exert thermoregulatory control over their skin blood flow.…”

supporting

confidence: 91%

The range of thermal insulation in the tissues of the new‐born baby

Hey¹,

Katz²

1970

The Journal of Physiology

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SlUMARY1. Rectal temperature and skin temperatures were measured in twentyeight naked babies weighing 1 1-4 5 kg, lying supine in environments of 25-31 0C when air speed was 4-7 cm/sec. The ratio of external insulation to internal or tissue insulation for the whole body averaged 2-7 but varied inversely with body weight; the ratio was higher than this on the trunk, and five times lower than this on the hand and foot. The mean ratio rose threefold when environmental temperature was increased to 34-350 C.2. Direct measurements of heat flow from the back of a hand placed in a water jacket maintained at 32°C were made in thirty-three babies. Heat loss averaged 3 kcal/m2. hr.0 C at low environmental temperature, but the loss was often rather less than this in the first 24 hr of life. Heat loss from the hand increased three-to fourfold, during exposure to an environment of 350 C.3. When babies more than 48 hr old were exposed to an environment of 34-350 C, heat loss from the hand only increased when rectal temperature reached between 36-6 and 37.30 C; a slightly higher rectal temperature was usually reached before heat loss rose in babies less than 24 hr old.4. Similar methods were used to study specific tissue insulation in three babies with congenital defects of the brain who lacked evidence of temperature control. No changes in insulation were detected in these three babies following changes in environmental temperature.5. It is concluded that the range and pattern of control that can be exerted over the specific thermal insulation of the tissues is essentially the same in babies 2-20 days old as it is in adult life.

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supporting

confidence: 91%

The range of thermal insulation in the tissues of the new‐born baby

Hey¹,

Katz²

1970

The Journal of Physiology

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“…Some authors (4,5 ) found a decreased reactive hyperaemia response and a lower baseline flow with increasing postconceptional age, whereas others (6,7) reported an increasing reactive hyperaemia response and a higher baseline flow with increasing postconceptional age. Moreover, the earlier studies on reactive hyperaemia in newborn premature infants were done with venous occlusion plethysmography of the limbs, which reflects the blood flow of both skin and muscles (4,6,8,9,10,11). This method does not discriminate between cutaneous and muscular blood flow.…”

mentioning

confidence: 99%

Postocclusive Reactive Hyperaemia of Cutaneous Blood Flow in Premature Newborn Infants

Beaufort‐Krol¹,

Suichies

Aarnoudse

et al. 1989

Acta Paediatrica

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“…

METHODSAn AGA Thermovision model 661 was used.

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mentioning

confidence: 99%

“…The principal mechanism of controlling heat loss during the first postnatal hour is the constriction of skin vessels, thus reducing radiation and the temperature gradient between skin and environment (2,4). Because of lack of suitable methods, our knowledge is only fragmentary concerning the immediate response of the peripheral circulation at birth.…”

mentioning

confidence: 99%

Changes in Skin Temperature of the Neonate at Birth

Tähti¹,

Lind²,

Österlund³

et al. 1972

Acta Paediatrica

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The principal mechanism of controlling heat loss during the first postnatal hour is the constriction of skin vessels, thus reducing radiation and the temperature gradient between skin and environment (2, 4). Because of lack of suitable methods, our knowledge is only fragmentary concerning the immediate response of the peripheral circulation at birth.Thermography offers a method to map out the heat distribution of the skin and by cinethermography sudden changes in temperature can be recorded almost continuously. METHODSAn AGA Thermovision model 661 was used. The equipment is made up of two basic units: an infrared camera and a modified oscilloscope that displays the thermal picture on its screen. The relation between temperature and radiation intensity is highly nonlinear. Therefore the instrument's calibration can be directly interpreted in terms of temperature only for a restricted range of temperature around the calibration temperature. The range is 20°C to 40°C for the instruments used (5).The camera equipment used was a Bolex 16 mm cinecamera fitted with a 50/60 Hz synchronous motor. The gear ratio has been chosen so that every other thermovision picture is filmed, i.e. the cine frame rate is 8 frame/second. The equipment also includes a phasing device, so that frame begins to be exposed at the same moment as the thermovision picture sweep commences.The camera was placed in the delivery room about 2 m from the labour bed. The thermograph was turned on at least 15 min before expected labour in order to reach satisfactory stability of the equipment. The temperature of the delivery room was about 24°C. The recording began at the moment when the vertex first appeared. In all fullterm babies, skin temperature of the center of both palms and heels, epigastrium and back (between the scapulae) were measured with an electrical thermometer type "Sekunden Thermometer", using skin applicator. The response time of this electrode was 2-3 sec. Registrations were made within 10 sec, at 1, 3 and 5 min after birth in order to get a rough control of the temperature changes seen on the thermal picture and of the degree of cooling during the first 5 min. In a few infants, temperatures of the skull, cheeks and nose were also measured with the skin applicator.

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Hautdurchblutung und Thermoregulation bei neugeborenen Kindern

Cited by 25 publications

References 17 publications

The range of thermal insulation in the tissues of the new‐born baby

The range of thermal insulation in the tissues of the new‐born baby

Postocclusive Reactive Hyperaemia of Cutaneous Blood Flow in Premature Newborn Infants

Changes in Skin Temperature of the Neonate at Birth

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