Biomedical subjects

T de Boo

Publications and source records attributed to T de Boo.

59 records · Page 4Linked to original sources

PubMedDate not supplied

Effects of aging on cardiac blood flow velocities.

The effects of aging on cardiac blood flow velocities are important as a description of the natural history of the aging process and as a reference for evaluation of the aging cardiovascular system. We therefore studied these effects in 215 healthy volunteers, 120 males and 95 females, between 1 and 65 years old. Pulsed Doppler signals were recorded proximal and distal to the mitral (M) and tricuspid (T) valves, in the left ventricular outflow tract (LVOT), in the ascending aorta (AAO), in the right ventricular outflow tract (RVOT), and in the pulmonary artery (PA). Systolic (S) flow velocity patterns consist mainly of one peak. Diastolic blood flow velocity is characterized by two peaks: one due to early filling (E) of the ventricle and a second as a result of atrial contraction (A). All peaks are characterized by the maximum of the median velocity curve (Vmax). With age increasing from 1 to 65 years, VmaxS decreases in the AAO (40%) and PA (10%), VmaxE decreases on both sides of the M valve (proximal-50%; distal-30%), and the T valve (proximal-20%; distal-30%). However, with increasing age VmaxS increases in the LVOT (25%), and VmaxA increases on both sides of the M valve (proximal-20%; distal-50%) and proximal to the T valve (30%). VmaxS in the RVOT and VmaxA distal to the T valve did not show a relation with age. These observations demonstrate that in a normal population Vmax in the heart and great vessels is age dependent at most sites.(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗

PubMedDate not supplied

Angioplasty of the iliac and femoral arteries. Initial and long-term results in short stenotic lesions.

This retrospective study presents the initial and long-term results of 212 iliac and femoral angioplasties in a selected group of 175 patients with one to three short stenotic lesions (less than 3 cm each). Patients who had iliac (n = 157) and femoral (n = 55) angioplasties were followed for 6-101 months. Claudication was the principal indication for intervention. Success or failure was defined by using a combination of clinical and objective vascular laboratory criteria. Long-term success was estimated by the Kaplan-Meier method. Differences between survival curves for factors such as site of angioplasty and status of run-off were analysed with the log-rank test. For all 212 angioplasties, the initial technical success rate was 93%. The immediate failure rate was 7% (15/212). The cumulative patency rate after 5 years of all technical successful angioplasties was 82% (SE 4%). Five-year patency rates were 84% (SE 4%) for iliac and 73% (SE 11%) for femoral angioplasty. Only one variable in this selected group of patients was associated with success: the site of the lesion.

Adult↗

PubMedDate not supplied

Reliability and normal values for measuring the skin temperature of the hand with an infrared tympanic thermometer: a pilot study.

Recording asymmetry in skin temperature between symmetric body areas is useful in monitoring diseases that alter skin temperature. This pilot study checked the reported high reliability of recording skin temperature of the hands with an infrared tympanic thermometer, provided insight into the relationship between dorsal and palmar temperature differences, and assessed the agreement between these data and normative data obtained from thermograms. Using an infrared tympanic thermometer, two independent assessors measured the temperature of 13 asymptomatic, right-handed subjects (mean age, 30 years; range, 21 to 44 years). Both test-retest and interobserver reliabilities were high. Skin temperature of the hand differed with the site where it was measured; differences between sites changed over time. The mean absolute differences in skin temperature between dorsal and palmar aspects of the hands were 0.30 degrees C and 0.25 degrees C, respectively. These data match normative values reported in the literature for infrared thermograms.

Adult↗

PubMedDate not supplied

Do physical therapy and occupational therapy reduce the impairment percentage in reflex sympathetic dystrophy?

Reflex sympathetic dystrophy (RSD) is a disorder that can potentially result in permanent impairment. Because there are no adequate comparative studies regarding the additional value of physical therapy (PT) or occupational therapy (OT) for reducing the severity of permanent impairment in RSD, we prospectively investigated their effectiveness. At two university hospitals, we randomly assigned 135 patients with RSD of one upper limb, existing for <1 yr, to PT, OT, or control therapy (CT). One year after inclusion, impairment percentages were calculated according to the general method of the American Medical Association's Guides to the Evaluation of Permanent Impairment. For statistical evaluation, the Wilcoxon's signed-rank test (two-sided; alpha = 0.05) was used. The mean whole body impairments were as follows: PT, 21.6% and 19.1%; OT, 22.8% and 22.1%; CT, 22.0% and 22.1% (intention-to-treat and per protocol analysis, respectively). There were no significant differences between the groups. We conclude that impairment percentages in RSD patients treated with PT or OT did not differ significantly from those treated with CT at 12 months after inclusion.

Arm↗

PubMedDate not supplied

Chest radiography in acute traumatic rupture of the thoracic aorta.

Of 123 patients who had suffered blunt trauma to the chest traumatic aortic rupture was eventually confirmed in 61 and absent in 62 patients. The chest radiographs of these patients were examined for 15 signs reported in the literature as being associated with traumatic aortic rupture. Although many individual signs were significantly more frequent in the aortic rupture group they were not useful in differentiating between patients with and those without rupture of the aorta. By using discriminant analysis combining 2 or 3 signs, patients were classified as having aortic rupture or not. The best discrimination between the two groups was obtained using the combined signs of a widened paratracheal stripe, an opacified pulmonary window, a widened right paraspinal interface and a displaced nasogastric tube.

Aorta, Thoracic↗