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Biomedical subjects

V Ehehalt

Publications and source records attributed to V Ehehalt.

13 recordsLinked to original sources
PubMed1982

[Adrenergic cardiovascular responses during neuroleptanalgesia (author's transl)].

During major abdominal surgery with neuroleptanalgesia unexplainable increases of arterial blood pressure were observed several times without being objectified until now. Therefore the actual plasma catecholamines in connection with haemodynamic parameters like arterial blood pressure, heart rate and peripheral pulse amplitude were compared with synchronously measured concentrations of fentanyl in 31 patients undergoing standardized neuroleptanalgesia. From the data obtained it could be shown that the parameters of circulation do not always correlate with the concentration of the analgesic. Activation of the sympathetic nervous system was found in spite of sufficient analgesic medication. It was observed, with a sometimes particularly critical increase of pressure and decrease of pulse amplitude, mainly during the surgical stimulation in the upper abdomen. The causes of these increases and the possibilities of prevention also by other drugs are discussed.

Abdomen↗
PubMed1977

[The loss of volume in modern respirators during change of compliance and resistance (author's transl)].

Respirators with constant volume proved to have a distinct loss of originally set tidal volume, when mechanical respiratory disturbances are present. In cases with decreased compliance the loss of volume is mainly caused by compression of the basic volume of the apparatus. In cases with increased bronchial flow resistance - unfavourable inspiration - expiration ratio, too short or even lacking endinspiratory pressure plateau result in the distinct decrease of the set respiratory minute volume, which then requires an appropriate correction. The degree of volume loss was measured and analysed in 10 respirators which are in current use.

Airway Resistance↗
PubMed1977

[Report on an emergency of alveolar leakage following lung decortication (author's transl)].

A case of respiratory distress is reported following lung decortication. Of a 331/min applied respiratory volume 90% was lost due to the multiple alveolar leakage. The lung could be inflated only when the chest was closed and several Bülau drains with powerful suckers were inserted. When the lung surface came in contact with the chest wall, the lossof tidal volume could immediately be reduced and respiration was possible again.

Calcinosis↗
PubMed1975

[Controlled hyperventilation with dead space (author's transl)].

We report on a new kind of ventilation-hyperventilation, whereby dead space is added between the patient and the respirator. This kind of ventilation is compared with positive end expiratory pressure ventilation together with intermittent sighs on 10 dogs. Over a period of 80 hours no respiratory or circulatory differences were found in the two groups. There also was no difference in clinical or anatomic histologic findings. It was demonstrated that dogs can be artificially ventilated for a much longer period than estimated. The findings of "respirator lungs" were only shown in an emphysema of the lungs.

Acidosis, Respiratory↗