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Biomedical subjects

A C Davidson

Publications and source records attributed to A C Davidson.

45 records · Page 3Linked to original sources
PubMed1976

The relation between ease of forceps delivery and speed of cervical dilatation.

An attempt has been made to predict a difficult forceps delivery. The duration of the 7 to 10 cm cervical dilatation interval was measured from the completed cervimetric chart in 952 consecutive patients who delivered spontaneously between December 1973 and September 1974. The 7 to 10 cm cervical dilatation intervals of this group were compared with those of 378 consecutive patients in whom forceps were applied with the fetal head in the occipito-anterior position and 83 consecutive patients where Kielland's forceps rotation from the occipito-tranverse or occipito-posterior position was performed. The forceps deliveries were graded as 'easy', 'moderately difficult', or 'difficult'. In only 5% of the spontaneous delivery group did the 7 to 10 cm cervical dilatation interval exceed two hours. In the occipito-anterior and Kielland's forceps groups an 'easy' delivery could be expected if the 7 to 10 cm cervical dilatation interval was less than two hours. The greater this interval increased beyond two hours, the greater was the proportion of 'moderately difficult' and 'difficult' forceps deliveries.

Analgesia↗
PubMedDate not supplied

'Not for resuscitation': guidelines for decision making and documentation.

In 1991, the government's Chief Medical Officer made it clear that the responsibility for resuscitation policy lay with consultants, and that they should ensure this policy was understood by all staff caring for a patient, in particular junior medical staff. Since then, many hospitals and trusts have provided members of the multidisciplinary team with guidance on how to ensure that adequate and satisfactory communication is in place to record a patient's resuscitation status. However, as is common in the NHS, poor documentation is still evident. Guy's & St Thomas' Hospital Trust has been using a document since April 1998 which is clearly written, user friendly and does not contain ambiguous statements. With ongoing audit of this policy document we hope to reduce the incidence of inappropriate resuscitation attempts which are costly, both emotionally and financially, for all concerned.

Decision Making↗
PubMedDate not supplied

Aminophylline, respiratory muscle strength and exercise tolerance in chronic obstructive airway disease.

Fourteen patients with chronic obstructive airway disease participated in a randomized, double-blind, placebo controlled, cross-over study to assess the effect of acutely administered aminophylline on respiratory muscle strength and exercise tolerance. An increase in the distance walked in 6 min occurred following aminophylline (p less than 0.01). There was no improvement in respiratory muscle strength, assessed by maximal static mouth pressures, and no increase in maximal ventilation or oxygen uptake during a progressive exercise test. The ventilatory response to inhaled CO2 was increased (p less than 0.02), suggesting a central stimulatory effect of aminophylline. The mean increase in walking distance was 5.7%. In most cases, the change was small and unlikely to be of practical benefit.

Aminophylline↗