PubMed Health⌕ Search

Biomedical subjects

B Sundén

Publications and source records attributed to B Sundén.

12 recordsLinked to original sources
PubMed2001

Numerical investigation of combined impingement and convection heat transfer.

This paper concerns development of a prediction method for combined turbulent impingement and convection heat transfer. Firstly, a prediction of a single round unconfined impinging air jet without crossflow is investigated to assess the performance of linear and non-linear two-equation turbulence models. The results show that realizable and/or non-linear two-equation models may successfully be used for impinging jet heat transfer predictions but there are significant differences between the formulations. Among the models tested, a non-linear k-omega showed superior performance. Secondly, the influence of crossflow is considered and a plane confined air jet is investigated. For this case the models based on a frequency-equation (omega) show quite different and more reasonable predictions compared to the dissipation-equation (epsilon) based models.

Journal Article↗
PubMed1990

Assessment of patients suffering from chronic orofacial pain of nonspecific origin.

The diagnosis and assessment of patients suffering from chronic, persistent orofacial pain of nonspecific origin can be difficult because of the interactions between psychological and somatic signs. Patients with chronic pain are treated differently from those with acute pain and often fail to respond to the usual acute pain model. This article discusses the practical assessment and drug treatment of chronic orofacial pain of nonspecific origin.

Chronic Disease↗
PubMed1990

Experiences from a facial pain unit.

During the academic year 1988/1989, 282 patients with chronic orofacial pain were referred to the facial pain unit of the University of Helsinki; 143 of these patients were suffering mainly of orofacial dysesthesia and 139 patients of masticatory dysfunction. Thirty-six of the patients with orofacial dysesthesia were referred for a psychiatric consultation. The result revealed a strong mental disturbance component associated with this kind of pain disorder. The patients with orofacial dysesthesia were treated mostly with amitriptyline, clonazepam, and distigmin; the patients with masticatory dysfunction were treated with splints and/or occlusal rehabilitation.

Adult↗
PubMed1987

Ultrasound measurement of the ovarian volume.

The ovaries of 377 women between the age of 40 and 70 years were measured by ultrasound. About one third of the patients were postmenopausal. Mean value, standard deviation and S.E.M. of the ovarian volume were calculated and related to age, parity and menstrual cycle. Ovarian size decreased with age in all women but bore no relation to parity and day of menstrual cycle in the menstruating group of women over 40 years of age. A diagram of the ovarian volume related to age is presented. In postmenopausal women the volume was related to estrogen treatment, age, parity and years since menopause. In the group of women receiving orally administered estrogens for at least a year the p-values for all parameters were greater than 0.005. Furthermore, the ovarian volume of women under hormonal treatment did not decrease with age. On the other hand the most important factor for ovarian size in subjects not receiving estrogen treatment was age (p = 0.0056). The results presented here will serve as a prerequisite for sonar examination of the ovaries in women at high risk for development of ovarian carcinoma.

Adult↗
PubMed1980

Diagnostic ultrasound in threatened abortion and suspected ectopic pregnancy.

200 women threatened with abortion during the first 16 weeks of pregnancy were examined with diagnostic ultrasound to determine whether there were signs of intrauterine life. Of the 90 who showed positive signs, 8 aborted spontaneously later, the other 82 continued their pregnancy. The ultrasound investigation revealed no signs of intrauterine life in 110 patients. Of these, spontaneous abortion or later evacuation because of missed abortion 101 (histopathological examination showed degenerated villi in 98), not pregnant 4, mola hydatidosa 3, extrauterine pregnancies 2. An ultrasound examination was performed to ascertain whether 136 women with suspected ectopic pregnancy had intrauterine pregnancies. 61 of them had an intrauterine gestational sac, confirmed at clinical follow-up. One of the 61 was operated on with laparoscopy because of pain; no abnormalities were found. In 36 of the other 75, laparoscopy was performed. Ectopic pregnancy 21, ovarian or parovarian cyst 11, adhesions 2, salpingitis 1, and normal 1. Diagnostic ultrasound is excellent for accurate prognosis in threatened abortion. Unnecessary operations avoided; hospitalization in suspected ectopic pregnancies reduced.

Abortion, Threatened↗
PubMed1977

Neonatal and prospective follow-up study of infants delivered by vacuum extraction (VE).

Forty infants delivered by vacuum extraction have been studied in the neonatal period--neurological examination, neonatal CSF-examinations, skull X-ray examination, transillumination and sonoencephalography --and at 14 months of age--developmental and behavioural evaluation, neurological examination, skull X-ray examination, sonoencephalography and electroencephalography. Two infants died in the neonatal period but in both cases a life-threatening situation of the fetus required immediate delivery. CSF cytological signs of haemorrhage were observed in 42% of the 26 infants who had a successful lumbar tap, compared to 10% found in normal deliveries. The result of the neonatal neurological study did not differ from that in a control group. The result of the skull X-ray examination and sonoencephalography were also within normal limits. In the follow-up study behavioural problems were found in 25%, but otherwise very few abnormalities were found. The deviatiosn found do not for the present indicate any later signs of brain lesions. It is concluded that this prospective study has shown that VE-delivery in fullterm babies seem to imply no risk fo serious cerebral sequelae. Further follow-up studies at a later age in order to evaluate the incidence of so-called minimal brain damage in VE-delivered children are required.

Adult↗