ISSN:0425-1644    

DOI:10.1111/j.2042-3306.1989.tb02098.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

ISSN:0425-1644    

DOI:10.1111/j.2042-3306.1989.tb02099.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

SummaryA nuclear medicine facility constructed specifically for the application of a gamma camera system to the radioisotope imaging of bone, pulmonary circulation and ventilation in the horse is described. The gamma camera was previously used for human nuclear medicine, and a support for the gamma camera head was specifically designed for this work. Imaging protocols are suggested and the necessary materials for bone and lung studies are described. Images of bone and lung are shown and computer analysis of the data indicated. Imaging times are approximately 1 to 2 mins and typical bone and lung studies can be completed in 20 to 30 mins.

ISSN:0425-1644    

DOI:10.1111/j.2042-3306.1989.tb02100.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

ISSN:0425-1644    

DOI:10.1111/j.2042-3306.1989.tb02101.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

SummaryEight standardbred horses trotted on a treadmill for 55 mins at a sub‐maximal speed of 5m/sec and subsequently performed an exercise test consisting of 2 min intervals at increasing speed. Heart (HR) and respiratory (Rf) rates and venous blood samples were obtained before, during and for 5 mins after exercise. Gluteus medius muscle biopsies and rectal temperatures were taken before and after exercise. The mean HR was 132/min and the mean Rf was 156/min during the 5m/sec trotting. With 5m/sec exercise, plasma free fatty acids (FFA), glucose, creatinine and Cortisol concentrations increased markedly. Blood lactate increased slightly and plasma potassium increased initially and then decreased with a lengthened duration of trotting. Within 5 mins post exercise plasma FFA, glucose and Cortisol concentrations continued to rise, whereas creatinine and lactate levels declined slightly and potassium concentrations declined rapidly to below resting values. The mean intramuscular (im) glycogen utilisation was 86 mmol/kg, no significant changes occurred in creatine phosphate (CP), adenosine triphosphate (ATP) and glucose‐6‐phosphate (G‐6‐P) concentrations and muscle lactate decreased significantly. During the second exercise test mean HR was 215/min and Rf 126/min at top speed. No significant change was seen in plasma glucose whereas Cortisol levels rose to a lesser extent, and creatinine lactate, ammonia and potassium concentrations to a greater extent, compared to 5 m/sec trotting. Post exercise, these parameters continued to increase except for creatinine which declined slightly and potassium which decreased rapidly. The mean im glycogen utilisation was 144 mmol/kg, ATP concentrations were unaltered, CP declined, lactate and G‐6‐P increased during exercise. The rapid changes in concentrations of blood chemistry parameters post exercise emphasise the importance of obtaining blood samples during exercise when studying metab

ISSN:0425-1644    

DOI:10.1111/j.2042-3306.1989.tb02102.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

ISSN:0425-1644    

DOI:10.1111/j.2042-3306.1989.tb02103.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

ISSN:0425-1644    

DOI:10.1111/j.2042-3306.1989.tb02104.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

ISSN:0425-1644    

DOI:10.1111/j.2042-3306.1989.tb02105.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

SummaryTotal respiratory impedance was measured rapidly and non‐invasively in conscious horses over the frequency range 3 to 40 Hz by the forced random noise method. The shape of curve of impedance versus frequency in horses was markedly different from that of humans. Respiratory resistance was readily found as the real part of impedence and both its absolute value and frequency dependence are useful indices of pulmonary function. It was difficult to obtain meaningful results in intubated animals with the method because of the mechanical properties of the endotracheal tube itsel

ISSN:0425-1644    

DOI:10.1111/j.2042-3306.1989.tb02106.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

ISSN:0425-1644    

DOI:10.1111/j.2042-3306.1989.tb02107.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY