13 research outputs found
Forearm rotation improves after corrective osteotomy in patients with symptomatic distal radius malunion
Objectives: Distal radius malunion can result in pain and functional complaints. One of the functional problems that can affect daily life is impaired forearm rotation. The primary aim of this study was to investigate the effect of corrective osteotomy for distal radius malunion on forearm rotation at 12 months after surgery. We secondarily studied the effect on grip strength, radiological measurements, and patient-reported outcome measurements (PROMs). Patients and methods: This cohort study analysed prospectively collected data of adult patients with symptomatic distal radius malunion. All patients underwent corrective osteotomy for malunion and were followed for 1 year. We measured forearm rotation (pronation and supination) and grip strength and analysed radiographs. PROMs consisted of the Patient-Rated Hand/Wrist Evaluation (PRWHE) questionnaire, Visual Analogue Scale for pain, and satisfaction with hand function. Results:Preoperative total forearm rotation was 112° (SD: 34°), of which supination of 49° (SD: 25°) was more impaired than pronation of 63° (SD: 17°). Twelve months after surgery, an unpaired Student's t-test showed a significant improvement of total forearm rotation to 142° (SD: 17°) (p < 0.05). Pronation improved to 72° (SD: 10°), and supination to 69° (SD: 13°) (p < 0.05). Grip strength, PROMs, as well as inclination and volar tilt on radiographs improved significantly during the first year after surgery (p < 0.05). Conclusion: In patients with reduced forearm rotation due to distal radius malunion, corrective osteotomy is an effective treatment that significantly improves forearm rotation. In addition, this intervention improves grip strength, the PRWHE-score, pain, and satisfaction with hand function.</p
Forearm rotation improves after corrective osteotomy in patients with symptomatic distal radius malunion
Objectives: Distal radius malunion can result in pain and functional complaints. One of the functional problems that can affect daily life is impaired forearm rotation. The primary aim of this study was to investigate the effect of corrective osteotomy for distal radius malunion on forearm rotation at 12 months after surgery. We secondarily studied the effect on grip strength, radiological measurements, and patient-reported outcome measurements (PROMs). Patients and methods: This cohort study analysed prospectively collected data of adult patients with symptomatic distal radius malunion. All patients underwent corrective osteotomy for malunion and were followed for 1 year. We measured forearm rotation (pronation and supination) and grip strength and analysed radiographs. PROMs consisted of the Patient-Rated Hand/Wrist Evaluation (PRWHE) questionnaire, Visual Analogue Scale for pain, and satisfaction with hand function. Results:Preoperative total forearm rotation was 112° (SD: 34°), of which supination of 49° (SD: 25°) was more impaired than pronation of 63° (SD: 17°). Twelve months after surgery, an unpaired Student's t-test showed a significant improvement of total forearm rotation to 142° (SD: 17°) (p < 0.05). Pronation improved to 72° (SD: 10°), and supination to 69° (SD: 13°) (p < 0.05). Grip strength, PROMs, as well as inclination and volar tilt on radiographs improved significantly during the first year after surgery (p < 0.05). Conclusion: In patients with reduced forearm rotation due to distal radius malunion, corrective osteotomy is an effective treatment that significantly improves forearm rotation. In addition, this intervention improves grip strength, the PRWHE-score, pain, and satisfaction with hand function.</p
Vegetation characteristics and eco-hydrological processes in a pristine mire in the Ob River valley (Western Siberia)
Relations between vegetation characteristics
and eco-hydrological processes were
assessed in a pristine mire in the valley of the
Ob River (Western Siberia). Along a transect
from the terrace scarp to the river, field data were
collected on vegetation composition, peat stratigraphy,
peat chemistry, hydrology and hydrochemistry.
Based on floristic composition, eight
vegetation communities were distinguished.
Hydraulic head measurements were used to
obtain an indication of groundwater flow directions.
The water balance of the mire was calculated
with a two-dimensional steady-state
numerical groundwater model. Water types were
defined based on cluster analysis of hydrochemical
data. The results revealed that the dominant
hydrological factor in the Ob mire is the discharge
of groundwater, which supplies about threefold
more water than net precipitation. Although the
discharge flux decreases with increasing distance
from the terrace scarp, high water levels and a
‘‘groundwater-like’’ mire water composition were
observed in the major part of the study site.
Precipitation and river water play only a minor
role. Despite dilution of discharging groundwater
with rainwater, spatial differences in pH and
solute concentrations of the surficial mire water
are small and not reflected in the vegetation
composition. Although small amounts of silt and
clay were found in the peat in the proximity of the
river, indicating the occurrence of river floods in
former times, no river-flood zone could be recognized
based on hydrochemical characteristics or
vegetation composition. A comparison of the Ob
mire with well-studied and near-natural mires in
the Biebrza River valley (Poland) revealed
substantial differences in both vegetation characteristics
and the intensity and spatial pattern of eco-hydrological processes. Differences in the origin and ratios of water fluxes as well as a
dissimilar land use history would seem to be key
factors explaining the differences observed