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Biomedical subjects

R W Nickalls

Publications and source records attributed to R W Nickalls.

12 recordsLinked to original sources
PubMed2001

Airway fire during tracheostomy: prevention strategies for surgeons and anaesthetists.

Airway fires are an uncommon but real and devastating complication of tracheostomy. One such fire in a 31-year-old man is described. Surgical fires are discussed, and 15 reported cases of tracheostomy fire are reviewed. A tracheostomy protocol, adopted by our department and designed to avoid this life-threatening complication, is described. Surgeons and anaesthetists involved in tracheostomy must understand the fire hazard and how to avoid it.

Adult↗
PubMed1996

The influence of target angular velocity on visual latency difference determined using the rotating Pulfrich effect.

Visual latency difference was determined directly in normal volunteers, using the rotating Pulfrich technique described by Nickalls [Vision Research, 26, 367-372 (1986)]. Subjects fixated a black vertical rod rotating clockwise on a horizontal turntable turning with constant angular velocity (16.6,33.3 or 44.7 revs/min) with a neutral density filter (OD 0.7 or 1.5) in front of the right eye. For all subjects the latency difference associated with the 1.5 OD filter was significantly greater (P < 0.001) with the rod rotating at 16.6 rev/min than at 33.3 revs/min. The existence of an inverse relationship between latency difference and angular velocity is hypothesized.

Adult↗
PubMed1987

A new percutaneous infraclavicular approach to the axillary vein.

A new percutaneous infraclavicular approach for cannulating the axillary vein is described. The technique was devised using surface landmarks established by cadaver dissection. This is a relatively safe procedure with no risk of pneumothorax, provided that the tip of the needle remains inferior to the clavicle.

Axillary Vein↗
PubMed1987

Dangers of placement of narrow bore nasogastric feeding tubes.

Three complications of the use of narrow bore nasogastric feeding tubes are described. Clinical tests to determine correct placement are noted to be unreliable and the importance of radiological confirmation is stressed. A number of suggestions are made for safe use of these tubes.

Adult↗
PubMed1986

The rotating Pulfrich effect, and a new method of determining visual latency differences.

A rotating Pulfrich effect is described and analysed in relation to the Fertsch-Pulfrich latency difference theory. Although some of the predictions conflicted with observations described by Pulfrich [Naturwissenschaften 10, 553-564 (1922)], they were confirmed by experiment, and led to a simple and sensitive method of determining visual latency differences.

Fixation, Ocular↗