[The influence of ultrasound therapy on patient's blood pressure subjected to activity ultrasound].
The ultrasound therapy is a one of physical methods to treat disorders of movement organ. The ultrasound wave, while passing through layers of tissues gives away acoustic energy. Each tissue of the body has got different structure and different ability to absorb the ultrasound energy. A biological influence of ultrasounds on the body depends on an amount of energy absorbed by the tissues. The influence is resultant of thermal and non-thermal effects of ultrasounds, which includes cavitation and acoustic streaming. Beside local reaction of tissues treated with ultrasound, there is also a general reaction of a whole body. Depends on parameters of ultrasound wave may have an influence on cardiovascular system, especially blood pressure, both on people with normal blood pressure and hypertension.


OBJECTIVE
Evaluation of change in blood pressure due to ultrasound therapy. Evaluation of change in blood pressure after ultrasound therapy among people with normal blood pressure and with hypertension. Research on influence of applied dose of ultrasounds and time of application on change in blood pressure.


METHODS
The research was done among 29 patients (aged form 30 to 83) qualified to ultrasound therapy by a physician. Each patient was treated with a one series of 10 ultrasound sessions. The ultrasound device used at that time was US 10 with applicator of 5 cm2 surface and 1 MHz frequency. The dose was 0.05-1.5 W/cm2 of continuous ultrasound wave applied dynamically. Time of each session was 3-9 minutes. Blood pressure was measured using Korotkow's method before and after first (measurement I, II), after fifth (III), and after tenth (IV) therapeutic session. The control group were 10 patients without ultrasound influence.


RESULTS
We observed statistically decreased patient's blood pressure after the ultrasound treatment. Blood pressure of patients with hypertension statistically decreased after ultrasound therapy too. Decrease of systolic blood pressure was observed after an application of medium dose of ultrasound (0.5-1.5 Wcm2) and medium time (4-9 min). We did not observed statistically changing of blood pressure in control patient's group.


CONCLUSIONS
Ultrasound therapy was found to have a decreasing influence on blood pressure. Ultrasound intensity and time of application may have an influence on blood pressure.
Ciejka
Elzbieta
E
Wyzsza Szkoła Kosmetologii i Ochrony Zdrowia, Katedra Fizjoterapii w Białymstoku. elzbieta.ciejka@gmail.com
Wiechna
Katarzyna
K
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001794:Blood Pressure / Q000502:physiology*; D005260:Female; D006801:Humans; D006973:Hypertension / Q000628:therapy*; D008297:Male; D008875:Middle Aged; D014464:Ultrasonic Therapy; D055815:Young Adult