Acute gastric volvulus is a life-threatening condition, but its intermittent nature and vague symptoms may make diagnosis difficult. Imaging is usually only diagnostic if carried out when patients are symptomatic. The population affected ranges from paediatric age group to elderly with multiple co-morbidities. Laparoscopic repair is advisable once a diagnosis is reached. This review on gastric volvulus focuses on the diagnostic and management challenges encountered, together with strategies for dealing with them. Lessons have emerged which may assist in dealing with such a rare presentation in future.

Cardiac tamponade is a poorly recognized complication of central venous catheterization associated with a high mortality. We present a case of fatal cardiac tamponade after intra- pericardial infusion of total parenteral nutrition in a patient who had two central venous catheters. We suggest that catheter tip position should always be confirmed before use of a catheter. Tamponade should be suspected in a patient who deteriorates when a central venous catheter is used and resuscitation via the catheter should be avoided.

Summary Guidelines are presented for safe practice in the use of intravenous drug infusions for general anaesthesia. When maintenance of general anaesthesia is by intravenous infusion, this is referred to as total intravenous anaesthesia. Although total intravenous anaesthesia has advantages for some patients, the commonest technique used for maintenance of anaesthesia in the UK and Ireland remains the administration of an inhaled volatile anaesthetic. However, the use of an inhalational technique is sometimes not possible, and in some situations, inhalational anaesthesia is contraindicated. Therefore, all anaesthetists should be able to deliver total intravenous anaesthesia competently and safely. For the purposes of simplicity, these guidelines will use the term total intravenous anaesthesia but also encompass techniques involving a combination of intravenous infusion and inhalational anaesthesia. This document is intended as a guideline for safe practice when total intravenous anaesthesia is being used, and not as a review of the pros and cons of total intravenous anaesthesia vs. inhalational anaesthesia in situations where both techniques are possible.

We report 16 adult men (age, 41 to 75 yr) with neuralgic amyotrophy (NA) who presented with dyspnea due to involvement of the diaphragm. All patients developed breathlessness after a prodrome of acute severe neck and shoulder pain. Bilateral diaphragm paralysis (BDP) was confirmed in 12 patients and unilateral diaphragm paralysis (UDP) in four by the absence of electrical and mechanical responses to percutaneous phrenic nerve stimulation. Global expiratory muscle strength was well preserved in all patients, but inspiratory muscle strength was reduced in proportion to the extent of diaphragmatic involvement. Lung function showed low lung volumes with preservation of carbon monoxide transfer coefficient in all patients. Two BDP patients were hypoxic (PaO2 = 67 and 54 mm Hg, respectively) on daytime arterial blood gas analysis; the latter patient with pre-existing chronic obstructive pulmonary disease and marked obesity also had borderline hypercapnia (PaO2 = 49 mm Hg). Overnight sleep studies in three BDP and two UDP patients showed frequent intermittent arterial oxygen desaturations apparently caused by obstructive sleep apneas, but there was no evidence of alveolar hypoventilation. Follow-up muscle studies in five BDP and four UDP patients between 2 and 4 yr after initial referral showed complete recovery of diaphragmatic function in only two UDP patients, one of whom relapsed a year later. We postulate that NA may be an important but underrecognized cause of diaphragmatic paralysis in otherwise normal patients. Diaphragmatic strength returns very slowly, if at all.

Fifty infants and 50 children less than 15 years undergoing palliative or corrective cardiac surgery in the Brompton Hospital between March and October 1988 had direct percutaneous stimulation of the phrenic nerve before and after operation. Ten patients, six under 1 year of age and four over, developed unilateral phrenic nerve injury. In those aged less than 1 year recovery after operation was prolonged because their diaphragmatic palsy made it difficult to wean them from the ventilator. Older children had symptoms but their rate of recovery did not seem to be affected by the phrenic nerve injury. Phrenic nerve damage was no more frequent after a lateral thoracotomy than after a median sternotomy. There was no significant association with the type of operation performed, the experience of the surgeon, the use of bypass or topical ice, the duration of bypass, circulatory arrest or aortic cross clamping, or the age of the patient at the time of operation. In patients who had cardiopulmonary bypass the risk of injury was significantly higher in those who had undergone previous operation. The 10% frequency of phrenic nerve injury determined in this prospective study was higher than that seen in earlier retrospective reports.Direct percutaneous stimulation of the phrenic nerve can be used at the bedside in infants and children to This non-invasive technique was modified for use in infants and children in the Brompton Hospital in a preliminary study'4 and normal values have also been established (in preparation). We performed a prospective study of 100 infants and children undergoing cardiac surgery to determine the frequency and predisposing factors contributing to phrenic nerve injury.Patients and methods The study was approved by the hospital medical ethics committee and parental consent was obtained. We studied 100 unselected infants and children undergoing palliative or corrective surgery for congenital heart disease in the Brompton Hospital between March and October 1988. Figure 1 shows their age distribution which ranged from 1 day to 14-5 years (median age 15 months).