IFC Therapy in Proximal Humerus Fractures

Not Applicable

Completed

Conditions: Interferential Current in Proximal Humerus Fractures

Interventions: Device: Interferential current
Other: Rehabilitation program

Registration Number: NCT04553497

Lead Sponsor: Ege University

Brief Summary: Proximal humerus fractures (PHFs) frequently occur in the elderly and osteoporotic population, but these fractures are also common in individuals under age 60 years. Conservative treatment of PHF usually involves a short period of immobilization followed by orthopedic rehabilitation. However, the severe pain of some patients with fractures limits their participation in the exercise programme, and shoulder muscle atrophy and frozen shoulder may occur in these patients due to immobilization. There are conflicting results regarding the use of physical therapy modalities in the shoulder pain management. Interferential current (IFC) therapy is believed to be effective for the pain-relieving through several mechanisms. Although IFC has been investigated in many painful shoulder disorders, there is no reported study on the effectiveness of IFC therapy in patients with PHF. This study aimed to investigate the effectiveness of IFC added to exercise on shoulder function, pain, and disability compared with placebo in patients with conservative treated PHF.

Patients were evaluated within the first week of PHF and divided into two groups to receive either IFC or sham using a simple randomization method. The orthopedic rehabilitation programme was applied to all patients three times a week for four weeks under the guidance of the same physiotherapist. IFC or sham therapy was applied three times a week for 20 minutes before each exercise session by another physiotherapist.

Shoulder functions, pain (visual analogue scale), disability and range of motion was evaluated at the end of the rehabilitation program, at 6-weeks and 18-weeks post-treatment by the physiatrist (ED) who did not know which group the patients belonged to. In addition, the amount of acetaminophen usage was noted at each visit.

Detailed Description: Patients with conservatively treated proximal humerus fracture who admitted to Ege University Physical Medicine and Rehabilitation outpatient clinic have been included in the study. All patients who met inclusion criteria were enrolled into the study at the first week of PHF. The orthopedic rehabilitation programme was applied to all patients three times a week for four weeks under the guidance of the same physiotherapist. The patients also received a complete set of premade exercise cards, which showed all exercises to ensure that the training program was learned correctly. The patients were recruited at the first week after proximal humerus fracture and then allocated into the groups. The patients were separated into two groups as interferential current or sham using a simple randomization method managed by an impartial observer. Flipping a coin was used for simple randomization (heads - sham, tails - treatment). The patient's group was reported to the physiotherapist who would apply interferential current in a closed envelope. Patients and the outcome assessor were blind to the treatment groups. The IFC therapy was applied using a combined electrotherapy device SONOPULS 692® (brand: Enraf-Nonius). The medium frequency of the IFC was 4000 Hz and 4100 Hz to produce the amplitude-modulated frequency at 100 Hz. Two rubber electrodes (8×6 cm) were fitted on the fractured shoulder. One of the electrodes was placed on the lateral part of the deltoid muscle; the other one was placed on the trapezius muscle near the shoulder. The current intensity was set to achieve a "strong but comfortable tingling" without visible muscle contraction. The sham therapy consisted of placing the same pads for the same time, but no electrical stimulation was applied to the probes. The primary outcome was shoulder global function which was measured by the Constant-Murley score (CMS). The questionnaire assesses four shoulder functions: 1) pain; 2) activities of daily living (sleeping, work, leisure); 3) range of motion; and 4) muscle strength. The total score ranges from 0 to 100, with a higher score indicating better shoulder function. Activity pain was measured with the visual analog scale (VAS). In addition, in order to evaluate shoulder function and disability, the Disability of the Arm, Shoulder and Hand questionnaire (DASH) was used. This self-administered questionnaire includes 30 questions evaluated on a 5-point Likert scale, most of which relate to the individual's capacity to realize a task. The patients were allowed to use paracetamol during the study and the paracetamol intake was recorded as gr/week.

Clinical assessments were evaluated at the end of the treatment, at 6-weeks and 18-weeks post-treatment. Only VAS resting pain was evaluated at the enrollment because the fractured side was immobile when the patients were included in the study. The physician who assessed the treatment outcomes, the patients and the physiotherapist who administer the exercises were unaware of the patient's group of treatment.

A clinically meaningful difference was considered to be a change of 15 points in total CMS. In order to detect this improvement, the number of patients needed was 17 per group according to a power of 0.80, a high size effect (d=0.88), a p value of 0.05, and a 15% dropout rate.

Statistical analysis was performed using SPSS version 20.0 (IBM, Armonk, NY, USA). An intention-to-treat analysis was employed for all analysis. The variables were investigated using visual (histogram, probability plots) and analytic methods (Kolmogorov-Smirnov, skewness and curtosis) to determine whether they were normally distributed or not. . Continuous data were described as median (inter-quartile range, IQR) or mean (standar deviation, SD) and categorical variables as percentages. Chi-square or Fisher's exact test was used to compare categorical variables and Mann-Whitney U test/Student's T-test was used to compare continuous variables. All outcome values were presented in mean and standard deviation. The repeated measures ANOVA test was used in comparison of the means of the repeated measures. The results of the repeated measures ANOVA were analyzed by Mauchly's sphericity test. If the parametric tests (factorial design for repeated measures analysis) did not provide the preconditions, the Greenhouse-Geisser correction was used for corrections to the degrees of freedom or Friedman's Test. The Bonferroni correction was used for multiple comparisons. A p value of less than 0.05 was considered to show a statistically significant result.

Recruitment & Eligibility

Status: COMPLETED

Sex: All

Target Recruitment: 35

Inclusion Criteria

Not provided

Exclusion Criteria

Any surgery history for shoulder pathologies
Previous electrotherapy experience before the fracture (to ensure blinding of therapy)
Any contraindication such as pacemaker, malignancy, pregnancy, etc. for IFC
Rheumatic disease such as rheumatoid arthritis and ankylosing spondylitis
Shoulder subluxation; having other fractures in addition to the PHF
Known or suspected joint infection or a specific condition such as peripheral or central nervous system lesions
Neoplasm; diabetes mellitus or osteonecrosis
Any mental disorder that may make it difficult to adapt to exercise

Study & Design

Study Type: INTERVENTIONAL

Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Rehabilitation and interferential current therapy	Interferential current	Flipping a coin was used for simple randomization (tails - interferential current). In this arm, interferential current therapy was applied to the patients in addition to the rehabilitation program.
Rehabilitation and sham therapy	Rehabilitation program	Flipping a coin was used for simple randomization (heads - sham). In this arm, sham therapy was applied to the patients in addition to the rehabilitation program.
Rehabilitation and sham therapy	Interferential current	Flipping a coin was used for simple randomization (heads - sham). In this arm, sham therapy was applied to the patients in addition to the rehabilitation program.
Rehabilitation and interferential current therapy	Rehabilitation program	Flipping a coin was used for simple randomization (tails - interferential current). In this arm, interferential current therapy was applied to the patients in addition to the rehabilitation program.

Primary Outcome Measures

Name	Time	Method
Constant-Murley Score	1. At the end of the treatment 2. The second evaluation: Six weeks after the first one (6th week post-treatment) 3. The last evaluation: Three months after the second one (18th week post-treatment)	The primary outcome was shoulder global function which was measured by the Constant-Murley score (CMS). The questionnaire assesses four shoulder functions: 1) pain; 2) activities of daily living (sleeping, work, leisure); 3) range of motion; and 4) muscle strength. The total score ranges from 0 to 100, with a higher score indicating better shoulder function.

Secondary Outcome Measures

Name	Time	Method
Disabilities of the Arm, Shoulder and Hand (DASH) Score	Disabilities of the Arm, Shoulder and Hand (DASH) Score was recorded at the end of the treatment, at 6-weeks and 18-weeks post-treatment	One of the secondary outcome was disability which was measured by the Disabilities of the Arm, Shoulder and Hand (DASH) Score. The DASH consists mainly of a 30-item disability/symptom on a 5-point Likert scale, scored 0 (no disability) to 100 (maximum disability).
Visual Analogue Scale	Visual analogue scale was recorded at the end of the treatment, at 6-weeks and 18-weeks post-treatment	The secondary outcome was pain which was measured by the visual analogue scale. The patients themselves used the VAS to make an assessment of their pain with 0 representing no pain, 10 cm representing severe pain.