Sökning: "Doppler ultrasound"

Visar resultat 31 - 35 av 82 avhandlingar innehållade orden Doppler ultrasound.

1. 31. Noninvasive assessment of cerebral circulation before, during and after carotid surgery

   Författare :Helene Zachrisson; Göteborgs universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Internal carotid artery disease; cerebrovascular hemodynamics; Carotid thrombendarterectomy; Duplex ultrasound; transcranial Doppler; Internal carotid artery disease;

   Sammanfattning : Non-invasive ultrasound investigations were evaluated in patients with carotid artery stenosis in comparison with radiological disease gradations and perioperative blood pressure measurements. The aim was to assess cerebrovascular hemodynamics before, during and after carotid thrombendarterectomy (CEA) in relation to the clinical outcome of the surgical intervention. LÄS MER

3. 32. Dynamic Fetal and Placental Circulatory Changes during Uterine Contractions

   Författare :Hui Li; Lund Obstetrik och gynekologi; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; sexualitet; reproduktion; andrologi; gynekologi; Obstetrik; sexuality; reproduction; andrology; gynaecology; Obstetrics; Venous; Uterine; Umbilical; Resistance; Pregnancy; Oxytocin; Labor; IUGR; Flow; Doppler; Contraction; Brain-sparing; Cerebral;

   Sammanfattning : The best mode of delivery for fetuses with intrauterine growth restriction (IUGR) and umbilical artery (UA) blood flow changes is not well elucidated. Uterine artery, fetal UA, middle cerebral artery (MCA), and venous blood flow changes during uterine contractions during an oxytocin challenge test (OCT) have not been observed systemically. LÄS MER

4. 33. Development in children born very preterm after intrauterine growth restriction with abnormal fetal blood flow

   Författare :Eva Morsing; Lund Pediatrik; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; umbilical artery; cognitive development; lung function; cardiovascular function; very preterm infants; Doppler ultrasound; Intrauterine growth restriction;

   Sammanfattning : Delivery of fetuses with intrauterine growth restriction (IUGR) with abnormal umbilical artery blood flow in the second trimester represents a clinical dilemma. So far, no evidence based management protocols are available adressing when to deliver these fetuses. LÄS MER

5. 34. Studies of vector tomography

   Författare :Kent Stråhlén; Matematik LTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Doppler tomography; Doppler Radon transform; local tomography; vectorial k-plane transform; vectorial Radon transform; k-plane transform; Radon transform; tomography; vector tomography; Mathematics; Matematik;

   Sammanfattning : The motivation to study the kind of problems appearing in this thesis has been ultrasound measurements of flows, from which velocity spectra along lines can be determined. These velocity spectra can mathematically be described by a new non-linear transform, here called the Doppler Spectral Transform (DST). LÄS MER

7. 35. Anal Fistula : Aspects of Aetiology, Diagnosis and Prognosis After Surgical Treatment

   Författare :Ulla-Maria Gustafsson; Wilhelm Graf; Torgny Svenberg; Uppsala universitet; []
   Nyckelord :Surgery; anal fistula; risk factors; endoanal advancement flap; anal incontinence; endoanal ultrasound; magnetic resonance imaging; gentamicin-collagen; micro perfusion; laser Doppler flowmetry; Kirurgi;

   Sammanfattning : Patients with idiopathic anal fistula (n=85) were compared with 215 control subjects, matched for age and sex, through a 180-item questionnaire. Obesity, smoking, constipation and bowel symptoms associated with IBS were more common in the patients. LÄS MER