Early PEMF therapy improves union success rates for delayed unions of long-bone fractures .
OrthoEvidence Journal (OE Journal) - ACE Report
OE Journal. 2014;2(9):22 BMC Musculoskelet Disord. 2013 Jan 19;14:35. doi: 10.1186/1471-2474-14-35.64 patients with delayed union following a long-bone fracture were randomized to receive either an active or sham treatment of pulsed electromagnetic field (PEMF) therapy between 16 weeks and 6 months postoperatively to determine whether early application of PEMF is effective in improving union success rates in these patients. Results indicated that, although union success rates were similar between groups at the 3-month assessment, PEMF therapy was associated with a significantly higher union success rate at study completion, compared to the control group (77.4% versus 48.1%). The average length of treatment at the end of the study was similar between groups.
Was the allocation sequence adequately generated?
Was allocation adequately concealed?
Blinding Treatment Providers: Was knowledge of the allocated interventions adequately prevented?
Blinding Outcome Assessors: Was knowledge of the allocated interventions adequately prevented?
Blinding Patients: Was knowledge of the allocated interventions adequately prevented?
Was loss to follow-up (missing outcome data) infrequent?
Are reports of the study free of suggestion of selective outcome reporting?
Were outcomes objective, patient-important and assessed in a manner to limit bias (ie. duplicate assessors, Independent assessors)?
Was the sample size sufficiently large to assure a balance of prognosis and sufficiently large number of outcome events?
Was investigator expertise/experience with both treatment and control techniques likely the same (ie.were criteria for surgeon participation/expertise provided)?
Ja = 1
Ungewiss = 0.5
Nicht relevant = 0
Nein = 0
Die Bewertung der Berichtskriterien bewertet die Transparenz, mit der die Autoren die methodischen und studienspezifischen Merkmale der Studie in der Veröffentlichung angeben. Die Bewertung ist in fünf Kategorien unterteilt, die im Folgenden vorgestellt werden.
3/4
Randomization
4/4
Outcome Measurements
4/4
Inclusion / Exclusion
3/4
Therapy Description
4/4
Statistics
Detsky AS, Naylor CD, O'Rourke K, McGeer AJ, L'Abbé KA. J Clin Epidemiol. 1992;45:255-65
Der Fragilitätsindex ist ein Instrument, das bei der Interpretation signifikanter Ergebnisse hilft und ein Maß für die Stärke eines Ergebnisses liefert. Der Fragilitätsindex gibt die Anzahl der aufeinanderfolgenden Ereignisse an, die zu einem dichotomen Ergebnis hinzugefügt werden müssen, damit das Ergebnis nicht mehr signifikant ist. Eine kleine Zahl steht für ein schwächeres Ergebnis und eine große Zahl für ein stärkeres Ergebnis.
Warum wurde diese Studie jetzt benötigt?
A common complication associated with treatment of fractures is delayed union or nonunion. Conservative treatments to promote bone healing are typically administered when these fractures are infection- and defect-free. One approach - pulsed electromagnetic field (PEMF) therapy - has previously been found to be effective, although the mechanism by which it carries out this effect is not well-known. Furthermore, some studies begin this treatment well after delayed union has been diagnosed (i.e. >6 months post-fracture), while others wait until nonunion is officially diagnosed. This study was needed to examine the efficacy of PEMF when applied early on, immediately following diagnosis of delayed union (i.e. approximately 16 weeks post-fracture).
Was war die wichtigste Forschungsfrage?
Is pulsed electromagnetic field (PEMF) therapy effective in improving bone healing in patients with postoperative delayed union following a long-bone fracture?
- At 3 months, union success was found in 12 patients (38.7%) in the treatment group and 6 patients (22.2%) in the control group, a non-significant difference (RR 1.74; p=0.256).
- At study completion, the union success rate was significantly greater in the treatment group (24/31 or 77.4%; 95% CI 0.58 to 0.90) compared to the control group (13/27 or 48.1%; 95% CI 0.28 to 0.68) (RR 1.61; p=0.029).
- The average length of treatment was similar between groups at the end of the study (treatment: 4.8 months; control: 4.4 months) (p=0.489).
Was sollte ich mir besonders merken?
Although union success rates were similar between groups at the 3-month assessment, pulsed electromagnetic field (PEMF) therapy was associated with a significantly higher union success rate compared to the control group at study completion (77.4% versus 48.1%). The average length of treatment at the end of the study was similar between groups.
Wie wird sich dies auf die Behandlung meiner Patienten auswirken?
Results from this study support the early application (i.e. 16 weeks to 6 months postoperatively) of pulsed electromagnetic field (PEMF) therapy in the treatment of patients with delayed union of long bone fractures. These findings are limited by varying degrees of damage in each patient, the small number of patients for each fracture location, and variability in the patients' activity levels. Future studies should determine whether there is a difference in patient outcome whether PEMF is administered at 16 weeks versus 6 months postoperatively.
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