Search PubMed⌕ Search

Biomedical subjects

Steen W Henneberg

Publications and source records attributed to Steen W Henneberg.

5 recordsLinked to original sources
PubMed2003

[Reflex dystrophy affects children, too].

Reflex dystrophy or Complex Regional Pain Syndrome (CRPS) is a neuropathic pain condition in a limb after a trauma. Pain is not limited to one or more dermatomes and there is a disproportion between the intensity of the pain and the eliciting trauma. Among physicians in Denmark it is not common knowledge that CRPS also affects children. It is not described in paediatric textbooks and until 1978 there were only eight published case reports. CRPS is seen in older children and teenagers and the pain is often located in a leg. CRPS is more common among girls than boys (approx. 4:1). Lack of knowledge of CRPS in children often results in a fairly long delay between the onset of symptoms and the diagnosis. Physiotherapy is an important part of the treatment of CRPS but concomitant pain treatment is often required in order to make physiotherapy possible. Sympathetic nerve block with intravenous regional guanethedine block or an epidural blockade is used. A number of analgesics may also be used. The treatment should be administered by a multi-disciplinary team. The incidence of CRPS in children in Denmark is unknown but the condition is probably under-diagnosed. Early diagnosis and active treatment may reduce the duration of the condition considerably.

Adolescent↗
PubMed2002

Comparison of conventional averaged and rapid averaged, autoregressive-based extracted auditory evoked potentials for monitoring the hypnotic level during propofol induction.

BACKGROUND: The extraction of the middle latency auditory evoked potentials (MLAEP) is usually done by moving time averaging (MTA) over many sweeps (often 250-1,000), which could produce a delay of more than 1 min. This problem was addressed by applying an autoregressive model with exogenous input (ARX) that enables extraction of the auditory evoked potentials (AEP) within 15 sweeps. The objective of this study was to show that an AEP could be extracted faster by ARX than by MTA and with the same reliability. METHODS: The MTA and ARX methods were compared with the Modified Observer's Assessment of Alertness and Sedation Scale (MOAAS) in 15 patients scheduled for cardiac surgery and anesthetized with propofol. The peak amplitudes and latencies were recorded continuously for the MTA- and ARX-extracted AEP. An index, AAI, was derived from the ARX-extracted AEP as well. RESULTS: The best predictors of the awake and anesthetized states, in terms of the prediction probability, Pk, were the AAI (Pk [SE] = 0.93 [0.01]) and Na-Pa amplitude (MTA, Pk [SE] = 0.89 [0.02]; ARX, Pk [SE] = 0.87[0.02]). When comparing the AAI at the MOAAS levels 5-3 versus 2-0, significant differences were achieved. During the transitions from awake to asleep, the ARX-extracted AEP were obtained with significantly less delay than the MTA-extracted AEP (28.4 s vs. 6 s). CONCLUSION: The authors conclude that the MLAEP peaks and the AAI correlate well to the MOAAS, whether extracted by MTA or ARX, but the ARX method produced a significantly shorter delay than the MTA.

Anesthetics, Intravenous↗