直接與間接膝部短波熱療對下肢血流及體表溫度的影響

Change of Arterial Blood Flow and Skin Temperature after Direct and Indirect Shortwave Heationg on Knee

詹美華(Mei-Hwa Jan) ； 葉炳強(Ping-Keung Yip) ； 林光華(Kwan-Hwa Lin)

《中華民國物理治療學會雜誌》 18卷1期 (1993/03) Pp. 64-71

https://doi.org/10.29616/JPTAROC.199303.0007

摘要

The aim of this study was to investigate the differential effect of direct and indirect heating by applying shortwave diathermy on single knee. All of 58 experimental subjects are physical therapy students or junior teaching assistants. They do not have cardiovascular diseases and any musculoskeletal or neuromuscular disorders of their lower extremities. The average age of them is 22.4±0.9y/o; the average height of them is 167.6±3.7cm; the average weight is 66.4±2.4kg. All of their right knees received shortwave diathermy with inductional cable twice with one week apart. Initially the left knee was kept in close to righ knee during heating, then one week later the left knee was kept 30cm distant from right knee when receiving shortwave diathermy for eliminating the direct electromagnetic effect of shortwave. The two experiments were arranged at an interval of at least one week to avoid residual heat effect. Before and after receiving shortwave diathermy, skin temperature of bilateral lower extremities at central patella, above patella 15cm and below patella 10cm were measured by a thermometer. The vessel diameter, its area of cross section, the time average velocity and total volume of blood flow of femoral and popliteal arteries were also recorded by Doppler ultrasound (Diasonics DRF 400). The data were analyzed by paired-t test. This study demonstrated the following results:
1. Direct and indirect shortwave heating increased skin temperature significantly in both lower extremities. The direct heating cannot raise skin temperature more than indirect heating and it made no difference whether both knees were separated or not.
2. Increase of femoral arterial diameter, its area of cross section, average velocity, and total volume of blood flow per minute was significant in direct heating side (right knee). Some subjects showed negative response and the decrease of blood flow was significant, too.
3. There were two different responses with indirect heating. Increase of vessel diameter, area of cross section, average velocity, and total volume of blood flow was not significant in subjects with both knees closed. Decrease of average velocity and total volume of blood flow per minute was significant in subjects with both knees separated.
4. The effect of direct heating by shortwave diathermy may not be substituted by indirect heating.

關鍵字

短波 ； 熱療 ； 循環

並列摘要

The aim of this study was to investigate the differential effect of direct and indirect heating by applying shortwave diathermy on single knee. All of 58 experimental subjects are physical therapy students or junior teaching assistants. They do not have cardiovascular diseases and any musculoskeletal or neuromuscular disorders of their lower extremities. The average age of them is 22.4±0.9y/o; the average height of them is 167.6±3.7cm; the average weight is 66.4±2.4kg. All of their right knees received shortwave diathermy with inductional cable twice with one week apart. Initially the left knee was kept in close to righ knee during heating, then one week later the left knee was kept 30cm distant from right knee when receiving shortwave diathermy for eliminating the direct electromagnetic effect of shortwave. The two experiments were arranged at an interval of at least one week to avoid residual heat effect. Before and after receiving shortwave diathermy, skin temperature of bilateral lower extremities at central patella, above patella 15cm and below patella 10cm were measured by a thermometer. The vessel diameter, its area of cross section, the time average velocity and total volume of blood flow of femoral and popliteal arteries were also recorded by Doppler ultrasound (Diasonics DRF 400). The data were analyzed by paired-t test. This study demonstrated the following results:
1. Direct and indirect shortwave heating increased skin temperature significantly in both lower extremities. The direct heating cannot raise skin temperature more than indirect heating and it made no difference whether both knees were separated or not.
2. Increase of femoral arterial diameter, its area of cross section, average velocity, and total volume of blood flow per minute was significant in direct heating side (right knee). Some subjects showed negative response and the decrease of blood flow was significant, too.
3. There were two different responses with indirect heating. Increase of vessel diameter, area of cross section, average velocity, and total volume of blood flow was not significant in subjects with both knees closed. Decrease of average velocity and total volume of blood flow per minute was significant in subjects with both knees separated.
4. The effect of direct heating by shortwave diathermy may not be substituted by indirect heating.

並列關鍵字

Shortwave ； Heat ； Circulation