Electrical stimulation of quadriceps during rehabilitation following proximal femoral fracture

A systematic review of using electrical stimulation to improve clinical outcomes after hip fractures

BACKGROUND

Pain and muscles weakness often delays regaining independent mobility following hip fracture surgery. Electrical stimulation may relieve pain and improve muscle strength and function.

PURPOSE

To systematically review and evaluate available literature examining the effectiveness of using electrical stimulation to promote clinical outcomes after hip fractures.

METHODS

Two researchers independently searched MEDLINE, CINAHL, EMBASE, Web of Science, Cochrane Reviews, Physiotherapy Evidence Database, and PsycInfo from inception to July 1, 2018, with no restrictions. The quality and fidelity of the included interventions were assessed, and expert consultation was conducted to help explain the results.

RESULTS

We identified 432 records through database searching. Initial screening indicated 24 articles were appropriate for full-text review, and four articles met the inclusion criteria. In included studies, electrical stimulation (i.e. TENS) reduced pain (mean difference (MD) = 3.3 points on 10-point Visual Analogue Scale, p < .001), improved range of motion (ROM) (MD: 25.7°, p < .001), and accelerated functional recovery immediately after hip fracture (p < .001). Conflicting evidence existed when using neuromuscular electrical stimulation to improve muscle strength and other functional outcomes (e.g. mobility); however, nine experts advised that longer-term interventions might be necessary to achieve significant improvment in muscle strength.

CONCLUSION

Available evidence, albeit limited, supports the early application of noninvasive electrical stimulation (e.g. TENS) for improving clinical outcomes (i.e. reducing pain, improving ROM, and accelerating functional recovery after hip fractures). We could not find conclusive evidence on the effectiveness of using electrical stimulation to improve muscle strength. This review establishes the need for future additional high-quality trials in this field.

Interventions for improving mobility after hip fracture surgery in adults

BACKGROUND

Hip fracture mainly occurs in older people. Strategies to improve mobility include gait retraining, various forms of exercise and muscle stimulation.

OBJECTIVES

To evaluate the effects of different interventions for improving mobility after hip fracture surgery in adults.

SEARCH STRATEGY

We searched the Cochrane Bone, Joint and Muscle Trauma Group Specialised Register, the Cochrane Central Register of Controlled Trials, MEDLINE and other databases, and reference lists of articles, up to April 2010.

SELECTION CRITERIA

All randomised or quasi-randomised trials comparing different mobilisation strategies after hip fracture surgery.

DATA COLLECTION AND ANALYSIS

The authors independently selected trials, assessed risk of bias and extracted data. There was no data pooling.

MAIN RESULTS

The 19 included trials (involving 1589 older adults) were small, often with methodological flaws. Just two pairs of trials tested similar interventions.Twelve trials evaluated mobilisation strategies started soon after hip fracture surgery. Single trials found improved mobility from, respectively, a two-week weight-bearing programme, a quadriceps muscle strengthening exercise programme and electrical stimulation aimed at alleviating pain. Single trials found no significant improvement in mobility from, respectively, a treadmill gait retraining programme, 12 weeks of resistance training, and 16 weeks of weight-bearing exercise. One trial testing ambulation started within 48 hours of surgery found contradictory results. One historic trial found no significant difference in unfavourable outcomes for weight bearing started at two versus 12 weeks. Of two trials evaluating more intensive physiotherapy regimens, one found no difference in recovery, the other reported a higher level of drop-out in the more intensive group. Two trials tested electrical stimulation of the quadriceps: one found no benefit and poor tolerance of the intervention; the other found improved mobility and good tolerance.Seven trials evaluated strategies started after hospital discharge. Started soon after discharge, two trials found improved outcome after 12 weeks of intensive physical training and a home-based physical therapy programme respectively. Begun after completion of standard physical therapy, one trial found improved outcome after six months of intensive physical training, one trial found increased activity levels from a one year exercise programme, and one trial found no significant effects of home-based resistance or aerobic training. One trial found improved outcome after home-based exercises started around 22 weeks from injury. One trial found home-based weight-bearing exercises starting at seven months produced no significant improvement in mobility.

AUTHORS' CONCLUSIONS

There is insufficient evidence from randomised trials to establish the best strategies for enhancing mobility after hip fracture surgery.

Randomised controlled trial of electrical stimulation of the quadriceps after proximal femoral fracture

BACKGROUND AND AIMS

Proximal femoral fracture is often associated with long-term residual disability. Quadriceps weakness may be a factor in poor outcome. This study aimed to determine whether training of the quadriceps using electrical stimulation (ES) increases leg extensor power and decreases disability in elderly subjects rehabilitating after fracture.

METHODS

A single-blind randomized controlled trial of elderly postsurgical proximal femoral fracture patients, comparing 6 weeks of supplementary electrical stimulation of the quadriceps (15 patients) to usual physiotherapy alone (11 patients). The electrical stimulation on:off duty cycle was 7:23 seconds, with 36 cycles per session, given daily as an in-patient and twice weekly after discharge. The primary outcome measure was change in leg extensor power (Nottingham Power Rig). Functional mobility (Elderly Mobility Scale), disability (Barthel Index) and health status (Nottingham Health Profile) were also measured.

RESULTS

There was no significant difference in change in leg extensor power, or any other outcome measure, in the ES group compared to usual care controls. Fractured leg extensor power increased by 10.9 (standard error of the mean 2.1) Watts at 6 weeks in the ES group compared to 15.3 (5.5) in the controls (mean adjusted difference -3.1, 95% CI -7.8, 1.6 Watts). Only 3 (20%) of the intervention patients tolerated sufficient stimulation intensity to produce repetitive knee extension, while 11 (73%) sustained palpable or visible contractions with no leg movement.

CONCLUSION

A 6-week program of electrical stimulation of the quadriceps did not increase leg extensor power, or reduce disability, in elderly patients rehabilitating after surgical fixation of proximal femoral fracture. In many patients local discomfort limited the intensity of electrical stimulation that could be delivered.

Mobilisation strategies after hip fracture surgery in adults

BACKGROUND

Hip fracture mainly occurs in older people. Mobilisation strategies such as gait retraining and exercises are used at various stages of rehabilitation after surgery.

OBJECTIVES

To evaluate the effects of different mobilisation strategies after hip fracture surgery in adults.

SEARCH STRATEGY

We searched the Cochrane Bone, Joint and Muscle Trauma Group Specialised Register, the Cochrane Central Register of Controlled Trials, MEDLINE and other databases, conference proceedings and reference lists of articles, up to January 2006.

SELECTION CRITERIA

All randomised or quasi-randomised trials comparing different mobilisation strategies after hip fracture surgery.

DATA COLLECTION AND ANALYSIS

The authors independently selected trials, assessed trial quality and extracted data. There was no data pooling.

MAIN RESULTS

Most of the 13 included trials (involving 1065 participants, generally over 65 years) were small and all had methodological limitations, including inadequate follow up. Seven trials evaluated mobilisation strategies started soon after hip fracture surgery. One historic trial found no significant differences in unfavourable outcomes for weight bearing started at two versus 12 weeks after internal fixation of a displaced intracapsular fracture. Two trials compared a more with a less intensive regimen of physiotherapy: one found no difference in recovery, the other found a higher level of drop-out in the more intensive group with no difference in length of hospital stay. One trial found short-term improvement in mobility and balance for a two-week programme of weight-bearing versus non-weight-bearing exercise. One trial found improved mobility in those given a quadriceps muscle strengthening exercise programme. One trial found no significant difference in recovery of mobility after a treadmill versus conventional gait retraining programme. One trial found a greater recovery of pre-fracture mobility after neuromuscular stimulation of the quadriceps muscle. Six trials evaluated strategies started after hospital discharge. Started soon after discharge, two trials found improved outcome after 12 weeks of intensive physical training and a home-based physical therapy programme respectively. Begun after completion of standard physical therapy, one trial found improved outcome after six months of intensive physical training whereas another trial found no significant effects of home-based resistance or aerobic training. One trial found improved outcome after home-based exercises started around 22 weeks from injury. One trial found home-based weight-bearing exercises starting at seven months produced no statistically significant differences aside for greater quadriceps strength.

AUTHORS' CONCLUSIONS

There is insufficient evidence from randomised trials to establish the effectiveness of the various mobilisation strategies used in rehabilitation after hip fracture surgery. Further research is required to establish the possible benefits of the additional provision of interventions, including intensive supervised exercises, primarily aimed at enhancing mobility.

Mobilisation strategies after hip fracture surgery in adults

BACKGROUND

Hip fracture, which happens in predominantly elderly populations, often results in a reduction in mobility. Care programmes after hip fracture surgery include strategies for mobilisation, such as early weight bearing and gait retraining. Other mobilisation strategies, such as exercises and physical training, are used at various stages in rehabilitation including after discharge from hospital.

OBJECTIVES

To evaluate the effects of different mobilisation strategies and programmes after hip fracture surgery.

SEARCH STRATEGY

We searched the Cochrane Musculoskeletal Injuries Group Specialised Register (May 2004), the Cochrane Central Register of Controlled Trials (The Cochrane Library Issue 2, 2004), MEDLINE and other databases, conference proceedings and reference lists of articles.

SELECTION CRITERIA

All randomised or quasi-randomised trials comparing different mobilisation strategies/programmes after hip fracture surgery.

DATA COLLECTION AND ANALYSIS

The reviewers independently assessed trial quality and extracted data.

MAIN RESULTS

Our third update, which extended the review scope to cover the whole rehabilitation period, included four new trials. Most of the 10 included trials were small and all had methodological limitations, including inadequate follow up. Seven trials evaluated mobilisation strategies started soon after hip fracture surgery. One trial (273 participants) found no statistically significant differences in unfavourable outcomes for weight bearing started at two versus 12 weeks after internal fixation of a displaced intracapsular fracture. Of two trials (188 participants) comparing a more with a less intensive regimen of physiotherapy, one reported a lack of demonstrable difference in recovery of the two patient groups, and the other found a higher level of drop-out in the more intensive group with no difference in length of hospital stay. One trial (80 participants) comparing two-week programmes of weight-bearing versus non-weight-bearing exercise found some short-term improvement in mobility and balance in the weight-bearing exercise group. One trial (80 participants) found improved mobility, leg extension power and Barthel score in those given a quadriceps muscle strengthening exercise programme. One trial (40 participants) found no statistically significant difference in recovery of mobility and time to hospital discharge after a treadmill versus conventional gait retraining programme. One trial (27 participants) comparing neuromuscular stimulation of the quadriceps muscle with placebo found a greater recovery of pre-fracture mobility in the stimulation group. The interventions tested by the three remaining trials started after hospital discharge. One trial (28 participants) found improved outcome after 12 weeks of intensive physical training. One trial (120 participants) found improved outcome after home-based exercises started around 22 weeks from injury. One trial (44 participants) found home-based weight-bearing exercises starting at seven months produced no statistically significant differences aside, perhaps, for greater quadriceps strength.

REVIEWERS' CONCLUSIONS

There is insufficient evidence from randomised trials to determine the effectiveness of the various mobilisation strategies examined in this review that start either in the early post-operative period or during the later rehabilitation period. Further research is required to establish the possible benefits of the additional provision of interventions primarily aimed at enhancing mobility.