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Biomedical subjects

Francis Van Glabbeek

Publications and source records attributed to Francis Van Glabbeek.

8 recordsLinked to original sources
PubMed2006

In vivo 3D arthrokinematics of the proximal and distal radioulnar joints during active pronation and supination.

BACKGROUND: Pronation and supination of the forearm are important motions with major impact of impairment on daily activities. Despite this, the migration of contact of the articular surfaces of the proximal and distal radioulnar joints during active pronation has not been evaluated in vivo. METHOD: Helical CT-data in elbow positions of full active supination, mid position and full pronation with the elbow in extension were acquired from three female subjects and processed in 3D skeletal reconstructions. From the sets of skeletal landmarks relative radioulnar finite helical axes were estimated. The migration of the articular contact was evaluated in the planes perpendicularly reconstructed on these finite helical axes. FINDINGS: The center of the radial head translated 1.96 (SD 0.24) mm from a posterior location on the ulna in supination to a centered location in mid-position and an anterior location in pronation. For the distal radioulnar joint, the center of rotation remained relatively fixed about the center of the curvature of the articular surface of the ulna. RELEVANCE: The motion of the radial head on the ulnar surface consists of an anterior spinning with anterior gliding which contrasts with the concave-convex rule as used in manual therapy i.e. posterior gliding of the caput radii on the ulna with pronation. As such, the findings have major therapeutic implications for manual therapy.

Adult↗
PubMed2005

Associated injuries complicating radial head fractures: a demographic study.

UNLABELLED: Treatment of radial head fractures may be complicated because of the presence of associated lesions. However, little is known about the frequency or relevance of associated lesions in different types of radial head fractures. We studied the demographics of radial head fractures focusing on associated lesions in 333 adults from 1997 to 2002. The mean age of the patients was 45 years (range, 18-82 years). Two hundred twenty-three (67%) patients had Mason Type 1 fractures, 46 patients had Mason Type 2 (14%) fractures, and 64 patients had Mason Type 3 (19%) fractures. One hundred eighteen of 333 patients (39%) had associated fractures or soft tissue injury. Fifty-three (16%) patients had coronoid fractures, and 45 patients (14%) had elbow dislocations. Two hundred thirty-five (71%) patients had nonoperative treatment, which failed in six (3%) patients. Sixty-six (20%) patients had open reduction and internal fixation, which failed in six (9%) patients. Resection was used in 20 (6%) patients, and radial head replacement was used in 31 (9%) patients, one of which was revised. The ligamentous injury required surgical repair or reconstruction in 44 patients. A concurrent coronoid fracture was the most common associated injury prompting referral to this tertiary medical center. LEVEL OF EVIDENCE: Diagnostic study, Level IV (case-control study). See the Guidelines for Authors for a complete description of levels of evidence.

Adolescent↗
PubMed2005

Plate fixation of middle-third fractures of the clavicle in the semi-professional athlete.

From 1995 to 2003, 39 semi-professional athletes (34 men and 5 women) aged 17-34 years (mountain bike racers, soccer players, swimmers and cyclists) with a displaced fracture of the middle-third of the clavicle were treated operatively using rigid plate fixation within one week after the initial trauma. In 90% of the athletes, radiographic union was achieved after 12 weeks. At 6 weeks post-operatively the mean Constant score was 88 points, the mean visual analogue pain score was 3 out of 10 and the average time for return to sports was 45 days. Seventy-five percent of the patients were very satisfied with the end-result and 95% would chose to have the same operation again. In 5% of the cases the end-result was unsatisfactory. The most frequent postoperative complication was wound infection (18% of the cases). Nevertheless, this did not affect the outcome. Other postoperative complications in our athletic population included refracture (5%), transient neurological complications (7%) and non-union (5%), which were equally low in the literature. These data suggest that rigid plate fixation of middle-third clavicle fractures gives good results in the semi-professional athlete and may result in early return to sports activity, at the expense of a significant risk for complications, which would not be considered acceptable in patients with lower functional demands.

Adolescent↗
PubMed2005

Surrounding soft tissue pressure during shoulder arthroscopy.

In 40 patients undergoing arthroscopic subacromial decompression, we monitored the soft tissue pressure in the paratracheal region and in the deltoid and supraspinatus muscles, looking for evidence of a potentially dangerous rise in pressure, especially in the paratracheal region. Statistical analysis was used to determine predictable variables of the time of reaching maximum pressure in and between the three regions. Deltoid pressure rose quickly during surgery, and did not drop to baseline levels at the end of surgery. Supraspinatus pressures showed a similar trend but with lower maximum levels of pressure rise. Five patients had an (unexpected) rise in paratracheal pressure, with an absolute maximum of 133.4 mmHg in one. In only two patients, did "10 minutes post-op" paratracheal pressure levels not drop to baseline levels. No respiratory problems occurred during any procedure. There are no variables to predict a potentially dangerous rise in surrounding soft tissue pressure during shoulder arthroscopy. We recommend endotracheal intubation during shoulder arthroscopy.

Adult↗
PubMed2003

The noncircular shape of the radial head.

PURPOSE: The purpose of this study was to define the shape of the radial head by identifying the relationship between precisely defined axes of the radial head. METHODS: An anatomic study was done to define the shape of the radial head and specifically the relationship between the long and the short axis. Twenty-seven cadaveric upper extremities were used. The x and y axes of the radial head were defined in relationship to the radial notch of the ulna, with the forearm in neutral position. Outer diameters of the x and y axis were measured. These were compared with the actual maximum and minimum diameters of the radial head. X and y diameters of the articulating surface of the radial head also were measured. RESULTS: Paired 1-tailed Student's t-tests were used to compare the x and y diameters of the radial head. Regression analysis of x and y diameters of the radial head was done to identify a correlation between these parameters.Paired 1-tailed Student's t-tests showed a significant difference between X and Y diameters of the radial head. Regression analysis of x and y diameters of the radial head showed a strong correlation between these 2 axes. CONCLUSIONS: The radial head is not round. A strong correlation exists between the x and y diameters of the radial head. The orientation of the long axis is perpendicular to the radial notch with the forearm in neutral rotation. This finding will make it possible to approach the anatomy of the radial head more closely when designing radial head prostheses. The definition of the axes can be used as a guide when implanting the radial head prosthesis.

Aged↗