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S M Sørensen

Publications and source records attributed to S M Sørensen.

13 recordsLinked to original sources
PubMed2001

[Complications of transligamental knee arthroscopy. The frequency of pain and ultrasonographic changes in the inferior patellar tendon].

INTRODUCTION: We wanted to investigate whether the transtendineous portal for arthroscopy was causing damage to the patellar tendon (PT). We also wanted to assess postoperative complaints related to the patellar tendon. METHODS: Out of 59 consecutive patients, who had neither anterior knee pain nor ultrasonographic changes in the tendon, and who had a planned transtendineous arthroscopy of the knee because of a suspected meniscal lesion or osteoarthritis, 36 patients were given both a clinical examination and ultrasonography of the PT before surgery and at two and six months. RESULTS: At the six months follow-up, 20 patients had tenderness of the PT, which was fewer than at the two-month follow-up. Ten patients had signs of granuloma formation of the patellar tendon and four had signs of perifibrosis/peritendinitis on ultrasonography. There was no statistical correlation between tenderness of the patellar tendon and granuloma formation (p = 0.48, Fisher's exact test) or perifibrosis/peritendinitis (p = 0.78, Fisher's exact test). DISCUSSION: More than 25% of the patients showed granuloma formation on ultrasonography and more than 50% had complaints from the patellar tendon, but both the symptoms and the complaints seemed to decline over time. The consequences of the postoperative changes in the patellar tendon six months postoperatively are uncertain, as there was no statistical correlation between tenderness of the PT and the findings at ultrasonography. Further studies are recommended to investigate the changes in the PT when this method is used.

Arthroscopy↗
PubMed1991

Measurement of anal cross-sectional area and pressure during anal distension in healthy volunteers.

A probe for simultaneous measurement of cross-sectional area and pressure was used to elucidate biomechanical wall properties during anal distension. Measurements in distal sphincter regions demonstrated a high resistance to stretch and a large hysteresis compared to proximal sphincter regions. Resistance to stretch decreased during anal distension indicating an active relaxation mechanism at all recording levels. The zone with high resistance to stretch was located more distal than the high-pressure zone measured by anal-pressure profilometry. In conclusion, biomechanical wall properties of the anal canal cannot be described by classic viscoelastic theories but rather by a loss of sphincter tone caused by reflex mechanism during anal distension.

Adult↗
PubMed1989

Randomised trial of endoscopic endoprosthesis versus operative bypass in malignant obstructive jaundice.

In patients with obstructive jaundice caused by malignant stricture of the extrahepatic bile duct we compared survival time, complication rates, hospitalisation requirements, and quality of life after palliation by endoscopic endoprosthesis or bypass surgery. During diagnostic endoscopic cholangiography 50 patients were randomised to the two treatment alternatives. All 25 patients randomised to endoprosthesis were treated by this procedure, whereas only 19 of 25 patients randomised to bypass surgery underwent operative biliary-digestive anastomosis. Life table analysis revealed no difference in survival between treatment groups or randomisation groups. No differences were found when other variables were compared. We conclude, that palliation of obstructive jaundice in malignant bile duct obstruction with endoscopically introduced endoprosthesis is as effective as operative bypass.

Aged↗
PubMed1989

Spontaneous anorectal pressure activity. Evidence of internal anal sphincter contractions in response to rectal pressure waves.

To characterize spontaneous anorectal pressure activity and a possible relation between the activity in the rectum and the anal canal, 11 healthy female volunteers were investigated. Resting activities were obtained during 1-h recordings with a multi-channel perfused catheter measuring the pressure 1, 2, 3, 7, and 8 cm from the anal verge. In five subjects sequences of rhythmic rectal pressure waves with amplitudes exceeding the maximal anal resting pressure coincided with a similar internal anal sphincter activity, preventing rectal pressure from exceeding the anal pressure at any point. The mean frequency was 5 x min-1 (range, 3-6 x min-1). This may well be a reflex mechanism by which the internal anal sphincter prevents incontinence in the resting state. Low-frequency pressure waves, not previously described, were detected in four women. These pressure waves were attributed to the internal anal sphincter and were named ultra-slow waves type II. The mean frequency and amplitude were 0.16 x min-1 (range, 0.15-0.17 x min-1) and 24 cm H2O (range, 11-41 cm H2O), respectively. The function of these pressure waves is unknown.

Adult↗
PubMed1988

Long term reproducibility of urodynamic investigations in healthy fertile females.

The long term reproducibility of uroflowmetry, urethral pressure profilometry, cystometry and pressure-flow studies was evaluated in 10 healthy fertile female volunteers over a two year period. All parameters were unchanged, except for an increase in the detrusor pressure. The volume at first sensation, the maximal cystometric capacity and the maximum flow rate, had a coefficience of variation (CV) of 24%, 15% and 21% respectively. The compliance and the opening time however showed a considerably higher CV. Several parameters showed a larger intra individual standard variation (SD) than the interindividual SD, indicating that these parameters should be interpreted with great care. Repetition of the investigations showed in this small material a reduction in the standard error of the mean (SEM). Repeating the investigation reduces the number of patients needed in a clinical trial to obtain a statistically significant change. The study showed that urodynamic investigation is a reliable tool in evaluation of patients over a period of years.

Adult↗
PubMed1987

The reliability of transabdominal ultrasound scanning in the determination of prostatic volume. An autopsy study.

The prostatic volume as determined by transabdominal ultrasound scanning using the ellipsoid method was compared to the prostatic volume determined by autopsy in 26 post-mortem men. The regression line was nearly optimal (Y = 1.06 chi + 0.57) although it seems that ultrasound underestimates prostatic volume slightly. The parametrical correlation coefficient was 0.86 and the non-parametrical Spearmans rho was 0.76. It is concluded that transabdominal ultrasound scanning has a definite value in the assessment of prostatic size.

Aged↗