In neurosurgical practice, extradural or subgaleal drains are commonly placed and connected to a vacuum system. Several reports have described severe bradycardia or arterial hypotension, or both, after connection of negative suction pressure to the extradural or epicranial drains following craniotomy. We encountered an unusual complication with the use of the vacuum drain after an elective aneu...

The Amber El Amino area is located 75 kilometres southeast of Prince Rupert. Access to the area is by helicopter from Prince Rupert or Terrace (Figure 1). The El Amino showing (BC MINFILE 103H 071) is located on Sulphide Creek (Figure 2) which drains eastward into Hanna (El Amino) Creek. The Amber showing (BC MINFILE 103H 171) is located 700 metres north of the El Amino showing. Hanna Creek dra...

The steady groundwater flow of water to drains on a sloping bed is re-examined. Results from a number of solutions for the maximum watertable height (hm) for flow to drains on slopes are presented and compared with published HeleShaw model results and HYDRUS2D numerical model calculations. Numerical modelling shows that when the length of the slope (L)  < 50 m the ratio L/hm is affected by L (...