Avtor/Urednik		Groell, Reinhard; Schaffler, Gottfried J; Schloffer, Stephan
Naslov		Breath-hold times in patients undergoing radiological examinations: comparison of expiration and inspiration with and without hyperventilation
Prevedeni naslov		Zadrževanje diha pri bolnikih, ki so radiološko preiskovani: primerjava časov po izdihu in po vdihu z ali brez hiperventilacije
Tip		članek
Vir		Radiol Oncol
Vol. in št.		Letnik 35, št. 3
Leto izdaje		2001
Obseg		str. 161-5
Jezik		eng
Abstrakt		Background: Breath-holding is necessary for imaging studies of the thorax and abdomen using computed tomography, magnetic resonance imaging or ultrasound examinations. The purpose of this study was to compare the breath-hold times in expiration and inspiration and to evaluate the effects of hyperventilation. Patients and methods. Thirty patients and 19 healthy volunteers participated in this study after informed consent was obtained in all. The breath-hold times were measured in expiration and inspiration before and after hyperventilation. Results. The mean breath-hold times in expiration (patients: 24+-9sec, volunteers: 27+-7sec) were significantly shorter than those in inspiration (patients: 41+-20sec, p<0.001; volunteers: 62+-18sec, p<0.001). Additional hyperventilation resulted in a significant increase (range: 40-60%, p>-0.005) of the mean breathhold times either in expiration and in inspiration and for both patients and volunteers. Conclusions. Although breath-holding in expiration is recommended for various imaging studies particularly of the thorax and of the abdomen, suspending respiration in inspiration enables the patient a considerable longer breath-hold time.
Izvleček		Izhodišča. Pri slikovnih preiskavah kot so računalniška tomografija, magnetna resonanca ali ultrazvok je potrebno, da bolnik zadrži dihanje. Namen pričujoče šudije je bil primerjati čase zadrževanja diha po vdihu in izdihu in ocenti učinek hiperventilacije. Bolniki in metode. V študiji smo obravnavali 30 bolnikov in 19 zdravih prostovoljcev, vsi so podpisali pismeno privolenje. Čas zadrževaja diha je bil merjen po izdihu in izdihu, pred in po hiperventilaciji. Rezultati. Srednji čas zadržanega diha po izdihu (bolniki 24+-9 sekunde, prostovoljci 27+-7 sekunde) je bil značilno krajši kot po vdihu (bolniki 41+-20 sekunde, p<0.001; prostovoljci 62+-18 sekunde, p<0.001). Razlika se je značilno povečala s hiperventilacijo (40-60%, p<_0.005) po izdihu in vdihu, tako pri bolnikih kot pri prostovoljcih. Zaključki. Čeprav je zadrževanje diha po izdihu priporočlivo pri različnih slikovnih preiskavah, zlasti še pri preiskavah trupa in trebuha, pa zadrževanje dihanja po vdihu omogoča, da bolniki zadržujejo zrak znatno dlje.
Deskriptorji		TOMOGRAPHY, X-RAY COMPUTED MAGNETIC RESONANCE IMAGING THORAX BREATH TESTS LUNG DISEASES, OBSTRUCTIVE HEART FAILURE, CONGESTIVE HYPERVENTILATION