The aim of this study is to compare effect of intradialytic NMES versus resistive training on physical measures and fatigue in HDP.
In this study we will compare between the effect of intradialytic neuromuscular electrical stimulation and resistive training on physical measures, dialysis efficiency and fatigue in HDP. This is first study that will compare between NMES and resistive training in HDP, investigating their effect on physical performance; dialysis efficiency and level of fatigue as previous studies show effect of each intervention alone.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
60
A supervised program of intradialytic NMES of the quadriceps and calf muscles of both lower limbs with different phases, types and current intensity. The electrical stimulation program will included (total time, intensity, contraction-relaxation phase time): a toning program in the first two weeks.
Part one: Warming up for 5 minutes in the form of lower limbs range of motion (active free) exercise from supine position. Part two: The main part is the resistive training for quadriceps and calf muscles from supine position using weights in the form of sand bags for 20 min. Part three: Cooling down for 5 minutes in the form of lower limbs range of motion (active free) exercise from supine position. The training parameters: The exercise training will be done during the first 2 hours of HD session using free leg weights. The patient will assume a supine lying position on the treatment plinth and perform the exercises for every lower limb separately while the other limb will be supported on the plinth by therapist or the patient himself. Resistance will be placed at the malleoli level in the distal third of the leg.
Outpatient clinic faculty of physical therapy cairo university
Dokki, Egypt
RECRUITINGAssessing the change in maximal strength of quadriceps and calf muscles
By using a Hand held dynamometer: A Kern-type standardized traction dynamometer (Kern CH50 50KG dynamometer) will used to assess the maximal strength of quadriceps and calf muscles will estimate. The patient will remain seated in a fixed chair so the back will supported on the back rest with the hip and knee at 90°, the subject will be asked to exert the greatest possible force without holding the chair with his/her arms,the values of muscular strength variables will be the mean of 3 consecutive measurements obtained by the same investigator to minimize errors
Time frame: at baseline and after 16 weeks of intervention
Assessing the change in predicted peak vo2 max
By using a 6-minute walk test (6MWT): It consisted of measuring the maximum distance covered during a 6 min period at an active pace, along a 20 m corridor near the HD unit. At the end of the test period, the total distance travelled was recorded by means of a standardized odometer,that will be used to calculate predicted peak vo2 by using the following equation Mean Peak VO2( ml /kg/min)= 4. 948+ 0. 023\*Mean 6 MWD (meters) (SEE 1.1 ml/ kg/ min), standard error of estimate (SEE).
Time frame: at baseline and after 16 weeks of intervention
Assessing the change in physical and psychological fatigue
Chalder Fatigue Questionnaire (CFQ11): is a short questionnaire, phrased in simple English with a straightforward answering system, it provides a brief tool to measure both physical and psychological fatigue. It consists from 11 items are answered on a 4-point scale ranging from the asymptomatic to maximum symptomology, a score of 0, increasing to 1, 2 or 3 as they become more symptomatic. The respondent's global score can range from 0 to 33. The global score also spans two dimensions physical fatigue (measured by items 1-7) and psychological fatigue (measured by items 8-11)
Time frame: at baseline and after 16 weeks of intervention
Assessing the change in Dialysis efficiency
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At baseline and 16 weeks after the intervention, blood samples will be collected after at least 12 h of fasting, and before the HD session, from an antecubital vein via venipuncture. Dialysis efficiency (represented using Kt/V) will be calculated from body weight and blood urea nitrogen (BUN) levels before and after dialysis using the Daugirdas formula as follows. Single-pool Kt/V will be calculated monthly using urea kinetic modeling equations derived from the following equation: (post: pre-dialysis plasma BUN ratio to estimate k. T/v and npcr: mathematical modeling) (second-generation logarithmic estimates of single-pool variable volume kt/v: an analysis of error). Kt/V = - ln(R - 0.008 × t) + \[(4-3.5 × R) × UF/W\], where R is the ratio of post-dialysis to pre-dialysis serum BUN concentration, t is the duration of hemodialysis in hours, UF is the amount of ultrafiltration (in l) during the HD session, and W is the post-dialysis weight (in kg).
Time frame: at baseline and after 16 weeks of intervention