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Biomedical subjects

Jens Haase

Publications and source records attributed to Jens Haase.

4 recordsLinked to original sources
PubMed2005

Testing repeatability of forces when using neurosurgical spatulas.

Virtual reality systems seems to be useful for training the use of brain spatulas without damaging brain tissue but the success of such a system is dependant on the human ability to discriminate pressures applied with the spatula. This paper describes an experiment designed to explore some central issues related to this ability: are surgeons better than laypeople, are the abilities in Virtual Reality (VR) and real world (RW) comparable, and will visual feedback enhance the ability. A group of surgeons and a control group of laypeople were tested in VR and RW. The results showed that surgeons performed better than the control group in RW but worse in VR, and that visual feedback improved the surgeons' abilities more than the control group. The results indicated that visual feedback is important for the success of such a virtual training system.

Computer Simulation↗
PubMed2003

Training brain retraction in a virtual reality environment.

A computer based virtual reality system is presented allowing the user to train skills related to brain retraction. The system is designed and the core training system implemented and tested. The initial test shows promising results.

Brain↗
PubMed2002

A case of late-onset primary hyperoxaluria type 1.

Primary hyperoxaluria type 1 (PH1) is an inherited metabolic disorder characterized by recurrent urolithiasis and nephrocalcinosis frequently leading to progressive renal insufficiency during the second decade of life. Systemic organ involvement as a result of the accumulation of calcium oxalate crystal deposits in vessel walls often is observed. We report a case of a 56-year-old woman with late-onset of PH1 who developed rapidly progressive renal failure and severe systemic oxalosis with skin and eye involvement despite intensified hemodialytic therapy during the waiting period for combined liver and kidney transplantation. This case illustrates the difficulties in treatment of PH1-induced end-stage renal disease. Combined liver and kidney transplantation should be offered to these patients as soon as possible to reverse the underlying metabolic defect and to restore renal function.

Female↗