Effects of Pulmonary Rehabilitation on Respiratory, and Cardiovascular Functional Capacity in COPD

Selection of project participants

COPD, duly diagnosed with proof of spirometric lung function, who are receiving outpatient care at the Hospital Santa Cruz (HSC) to compose the control group will be selected. For Rehabilitation Pulmonary Group fase 01 (GRP1) and Rehabilitation Pulmonary Group fase 02 (GRP2) will be selected COPD patients who participate in the program Rehabilitation Pulmonary occurring within the HSC, in the municipality of Santa Cruz do Sul - Rio Grande do Sul. The sample size calculation is performed according to the primary endpoint of the study.

All individuals involved in the project have signed a term of informed consent and answer a questionnaire of personal health, containing demographic information, exposure to radiation and drugs, as well as eating habits and consumption of alcohol and cigarettes.

Methodological procedures

The methodological steps of the study will consist of:

1. Selection of subjects according to the criteria of inclusion and exclusion;
2. As an outpatient treatment without Pulmonary Rehabilitation (PR) assess lung volumes, respiratory muscle strength, dyspnea for Medical Research Council (MRC), functional capacity for Functional Independence Measurement (MIF) and Six Minutes Walk Test (6MWT), grip strength, Quality of Life (QoL), body mass index (BMI), and ankle-brachial index (ITB);
3. As a submission to Rehabilitation Pulmonary after 02 months of treatment to assess lung volumes, respiratory muscle strength, MRC, functional capacity (MIF and 6MWT), grip strength, QoL, BMI, and ITB; 5) As a submission in Rehabilitation Pulmonary after 12 months of treatment to assess lung volumes, respiratory muscle strength, MRC, functional capacity (MIF and 6MWT), grip strength, QoL, BMI, and ITB

Techniques and tools for collecting

Lung volumes Lung volumes will be assessed through digital spirometry (EasyOne ®, Model 2001, Zurich, Switzerland). It is a tool to provide a record of several volumes and airflows that an individual is able to mobilize, as the gold standard for assessment of pulmonary functions according to the International Guidelines of the Global Initiative for Chronic Obstructive Lung Disease (GOLD, 2011). Forced vital capacity (FVC), forced expiratory volume in one second (FEV1), forced expiratory flow between 25% and 75% of FVC (FEF 25% -75%), FEV/FVC relationship, (In the present study, the following variables will be evaluated FEV1 / FVC) and peak expiratory flow (PEF) (GONTIJO, 2011). Three measures and the curve that presents the best performance will be compared with the predicted values in the literature and described in percentage of predicted will be realized (Pereira et al., 1992).

Respiratory Muscle Strength (FMR)

The FMR (MIP and MEP) will be evaluated through digital manometer (MDI®, Porto Alegre, Brazil). The MIP will be obtained after the individual expiration to residual volume (RV), the examiner connected with the nose clip and requested inspiration to total lung capacity (TLC). The MEP will be evaluated after the Total Lung Capacity inspiration to the residual volume the mouthpiece (ATS, 2002). For data analysis, will be considered the highest value among the five maneuvers, which did not differ more than 10% of the second highest value in descending order. These values are then compared with those reported in the literature (NEDER et al., 1999) and expressed as percentage of predicted. It is noteworthy that for these measures, the patient will remain in sitting position in the chair or sitting on the bed with an inclination of 45 °.

Functional dyspnea

The MRC (Medical Research Council), which is a British medical institute, developed a scale to graduate dyspnea in patients with COPD. The MRC scale is used for decades and has been adapted into Portuguese and published in published in the II Brazilian Consensus on COPD (2004). Patients were originally categorized into five grades, ranging from 1 ("normal") to 5 ("very dyspneic to leave the house"). The scale focuses primarily on dyspnoea occurring on walks. The MRC scale is widely used in patients with COPD due to its simplicity, ease of use and correlation with quality of life and prognosis.

Functional Capacity

Functional capacity is the independence of an individual to accomplish their mental and physical activities to maintain their basic and instrumental activities.

The Functional Independence Measure (FIM) is an assessment tool for people in the rehabilitation process, part of the Uniform Data System for Medical Rehabilitation (SUDRM) and is widely used and accepted internationally as a measure of functional assessment. Is linked to mobility and functional capacity in which the individual does not require help to perform the same, ie, independence supposed to satisfactory performance of motor and cognitive tasks conditions. The use of the scale focuses on the effective realization of activities independently in daily routine. So lets documenting their sensitivity to functional acquisitions and its correlation with functional levels.

The degree of dependence is classified according to the functional independence measure. This instrument consists of six dimensions: self-care, sphincter control, transfers, locomotion, communication and social cognition. Each item scores from 1 (total dependence) to 7 (complete independence). Obtain minimum total score of 18 and maximum of 126 points that characterize the levels of dependence. Through the individual score will be classified as follows: mild disability (> 80 points), moderate disability (40-80 points) or severe disability (<40).

To perform the 6MWT is the standard protocol used ATS Six-Minute Walk Test (2002). The 6MWT will be held itself, 02 tests, a practice test for educational purposes and another 6MWT, which will be validated for the collected information of the distance walked in six minutes and done. Standard phrases of encouragement will be given by the examiner and if necessary, subjects receive during testing, supplemental oxygen (O2) to maintain a peripheral O2 saturation above 90%.

Dynamometry Manual

Evaluation of peripheral muscle strength by Dynamometry Manual (DM) appears as a simple, objective, low cost alternative and less invasive to measure maximal voluntary handgrip strength and its principle to estimate the function of skeletal muscle. The dynamometer is a device simple to use, and provides fast and direct reading. This test enables indicating health risks related to muscle strength and correlated to other skeletal muscles in the human body, and is considered a good indicator for the overall muscle strength and also to assess physical performance in several clinical situations. Conform the American Society of Hand Therapist (ASHT), for measuring handgrip, patients should be seated comfortably with adducted and neutrally rotated, elbow flexed at 90 °, with arm in neutral pronation-supination and shoulder wrist joint between 0 ° and 30 ° of extension. The procedure should be performed three times in both limbs (right and left) the average of the measurements of each hemibody being calculated separately and given a resting time of 60 seconds between ume measurement and another quoted by.

Quality of Life (QOL)

The questionnaire St. George's Respiratory Questionnaire (SGRQ) which is specific for the assessment of QoL in patients with COPD will be used. This questionnaire consists of 76 items and is divided into 03 domains (symptoms, activity and impact of the disease). For each domain, the items are coded and transformed into a scale of zero (worst QOL) to 100 points (best QoL), according to the standardization of the Manual.

Anthropometric Assessment

The most widely used anthropometric measurements to assess nutritional status are: weight, height, circumferences (arm and waist), arm length and skinfold thicknesses (triceps, biceps, subscapular, suprailiac). Through the combination of these measures is possible to calculate the weight / height, arm muscle circumference and arm fat index relationships.

Anthropometric measurements are easy to perform and relatively sensitive to evaluate adult patients hospitalized in isolation as malnutrition. The body mass index (BMI), expressed as the relationship between body mass in kg and height in m2, is widely used as an indicator of nutritional status for its good correlation with body mass and low correlation with height.

Ankle-Brachial Index (ABI)

The ABI is a noninvasive measurement of peripheral arterial disease is highly predictive of subsequent cardiovascular morbidity and mortality in hypertensive patients. It is the relationship between the (maximum) of the ankle systolic blood pressure (right and left) and the (maximum) arm systolic blood pressure (right and left) with the patient at rest which is taken as a reference the largest value observed among measured the sides. Gauging the (maximum) systolic blood pressure of lower limbs is taken through the ankle being performed using a Doppler Vascular Portable and upper limbs with a sphygmomanometer. It will be noted that the ankle pressure is generally higher, then a ratio of 1 to 1.1 is normal. It is noteworthy that a lower index 0.9 provides strong evidence of peripheral arterial disease, thus the lower the value, the more severe the disease, as this reduction is due to the presence of arterial obstruction in the lower limb. This index is strongly associated with the incidence of strongly related to the individual's functional capacity Arterial Chronic Disease.

Waist-Hip Ratio (WHR)

To obtain the WHR, the waist is measured at the narrowest part of the waist, between the last rib and the iliac crest and hip circumference is taken at the widest area of the hips and the largest protuberance of the buttocks. Then divide the waist measurement by the hip measurement. WHO defines the indices of> 9.0 in men and> 8.5 in women as a crucial relationship to the metabolic syndrome. Studies confirm and cite several other studies that show that WHR is superior to predict all-cause and cardiovascular disease mortality clinical measure. Another Study add that the hip circumference indicates a lower risk of body fat accumulation and thus include it in the waist-hip ratio equation improves the accuracy of the measurement technique.

Lactate analysis

In conjunction with the 6MWT, the measure of capillary lactate could estimate muscle metabolism profile of COPD patients, since his early increase before the physical exertion seems to be associated with changes in muscle metabolism, observable loss of oxidative activity of skeletal muscle . The measurement will be performed after obtaining a drop of capillary blood from the tip of the second finger of the nondominant hand for analysis of lactate at rest and after the 6MWT, the pre-Rehabilitation Pulmonary intervals, 02, and 12 months post-Rehabilitation Pulmonary, (Lct) on the in lactate analyzer Accutrend Plus.

Intervention procedures

The group of patients undergoing Rehabilitation Pulmonary will carry out the intervention protocol as recommended by the GOLD (2009). Will undergo submaximal aerobic training for 30-40 minutes strength training for upper and lower limbs, muscle stretching, nutritional and pharmacological monitoring and continuing education sessions, twice a week. Such measures will be carried out under the Hospital Santa Cruz, Santa Cruz do Sul - Rio Grande do Sul.