Maria E Krautwald-Junghanns

Publications (2)4.03 Total impact

• Article: The effects of isoflurane anaesthesia on some Doppler-derived cardiac parameters in the common buzzard (Buteo buteo).

  Jens Straub, Neil A Forbes, Jens Thielebein, Michael Pees, Maria E Krautwald-Junghanns
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  ABSTRACT: In order to gain an initial overview of the influence of anaesthesia on the results of Doppler-derived blood flow measurements in raptors, the heart rate as well as three different sample volumes of pulsed-wave spectral Doppler-derived flow velocity (diastolic flow across the left and right atrioventricular valve, systolic flow across the aortic valve) were determined in 10 common buzzards (Buteo buteo). Measurements were taken once in conscious and once in anaesthetized birds. Anaesthesia was shown to produce significant changes in cardiac parameters recorded in the same birds whilst conscious. When comparing conscious birds with each other (with one exception for right sided ventricular inflow velocity) no correlation between the heart frequency and measured blood flow velocities was evident. This was also the case under anaesthesia. However, significant differences in these parameters were evident when comparing the results obtained before and under anaesthesia. The results suggest that the influence of anaesthesia in raptors is more than a simple reduction of heart rate and that there is also reduction in blood flow velocity.
  The Veterinary Journal 12/2003; 166(3):273-6. · 2.24 Impact Factor
• Article: Measurement of the cardiac silhouette in psittacines.

  Jens Straub, Michael Pees, Maria E Krautwald-Junghanns
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  ABSTRACT: To determine reference values for size of the radiographic cardiac silhouette in healthy adult medium-sized psittacines. Prospective case series. 46 African grey parrots (Psittacus erythacus), 7 Senegal parrots (Poicephalus senegalis), and 6 orange-winged Amazon parrots (Amazona amazonica). Birds were anesthetized, and ventrodorsal radiographic projections were obtained. Maximum width of the cardiac silhouette, width of the thorax at the level of the maximum width of the cardiac silhouette, and width of the coracoid were measured on the radiographs. Sternum length was directly measured on individual birds. Results of physical examination, electrocardiography, and echocardiography were normal in all birds. Mean cardiac silhouette width-to-sternum length ratio was 38%, mean cardiac silhouette width-to-thorax width ratio was 55%, and mean cardiac silhouette width-to-coracoid width ratio was 600%. Width of the cardiac silhouette was strongly correlated with length of the sternum, width of the coracoid, and width of the thorax. No significant differences between species were detected. Results suggest that in healthy adult medium-sized psittacines, the cardiac silhouette on a ventrodorsal radiographic projection should be 35 to 41 % of the length of the sternum, 51 to 61 % of the width of the thorax, and 545 to 672% of the width of the coracoid.
  Journal of the American Veterinary Medical Association 08/2002; 221(1):76-9. · 1.79 Impact Factor