Quantification of the Psychoacoustic Effect of Noise from Small Unmanned Aerial Vehicles.

This paper presents the results of a study evaluating the human perception of the noise produced by four different small quadcopter unmanned aerial vehicles (UAVs). This study utilised measurements and recordings of the noise produced by the quadcopter UAVs in hover and in constant-speed flight at a fixed altitude. Measurements made using a ½″ microphone were used to calculate a range of different noise metrics for each noise event.

Pheochromocytoma presenting as life-threatening pulmonary edema.

Acute cardiogenic pulmonary edema as the first presentation of pheochromocytoma is uncommon and usually rapidly fatal. A 39-yr-old man presented in acute cardiogenic shock with global ventricular dysfunction that required high-dose iv inotrope support and an intraaortic balloon pump assist device. Abdominal imaging to exclude aortic dissection revealed a 6-cm right adrenal mass.

Intermittent high frequency ventilation. Clinical evaluation of a new mode of ventilation.

In this first clinical study of a new mode of ventilation, called intermittent high frequency ventilation (IHFV), a comparison was made in ten patients after myocardial revascularization, between normal ventilation, high frequency ventilation (HFV) and IHFV at 15, 60, 100 and 160 breaths per min (b.p.m.

Hormonal and metabolic responses to cholecystectomy: comparison of extradural somatostatin and diamorphine.

We have studied the metabolic and hormonal responses to surgery, and the pain scores and analgesic requirements in 24 patients undergoing cholecystectomy, allocated randomly to three groups to receive either general anaesthesia alone, or general anaesthesia with extradural diamorphine 0.1 mg kg-1, or general anaesthesia with extradural somatostatin to a total dose of somatostatin 3 mg. The only significant effect of extradural diamorphine was a decrease in the glucose response to surgery.