Effects of perioperative respiratory rehabilitation in lung cancer resection: a pilot study


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Submission Date: 2020-09-15
Review Date: 2020-09-28
Pubblication Date: 2020-10-07
Printed on: Volume 2, Publications, Online Issue

Abstract

Abstract:

The aim of this study is to evaluate the impact of short term Preoperative Respiratory Rehabili-tation (PRR) on the changes of respiratory functions and clinical conditions in patients with ma-lignant lung cancer lesion and reduced respiratory functions, with high risk to develop postop-erative pulmonary complications (PPCs). A total of 15 patients were treated with PRR protocol. The rehabilitation programme was concluded by all patients. They showed a statistically signifi-cant improvement of lung functionality Forced Vital Capacity (FVC) (p=0,004), Forced Expira-tion Value in the first second (FEV1) (p<0,001) and walking distance (p<0,001). In addition, there was a significant enhancement of Partial Oxygen Saturation (SpO2) (p=0,002), Hart Rate (HR) (p=0,002) and Borg Dyspnoea Scale values (p=0,003) indicate a better cardiorespiratory functionality. In conclusion a short feasible PRR is suitable in patients’ candidate to thoracic surgery.

INTRODUCTION

Lung cancer is the most common cause of cancer mortality in males and females worldwide (Ferlay et al., 2010). Furthermore, the increase in global tobacco smoke leads to a rising of lung cancer mortality (Pesch et al., 2012). The treatment of lung cancer is based on surgery, radiation therapy, chemotherapy, and palliative care. These therapies may be used alone or in combination, in attempt to cure or manage the adverse effects of the malignant lung lesions (Bongers et al., 2012; Kim et al., 2012). The complete surgical resection is currently the only curative treatment for lung cancer. However, many of those patients are also affected by chronic obstructive pulmonary disease (COPD) (Ciatkowska-Rysz et al., 2012; Loganathan et al., 2006) which increases their risk of PPCs and their likelihood of being considered inoperable (Benzo et al., 2012; Agostini et al., 2010; Sekine et al., 2002). Physiotherapy has been used in prevention and treatment of major surgery complications since 1960s. Indeed, PPCs are an important cause of discomfort and morbidity for patients and lead to a longer intensive care and hospital stay (Reeve et al., 2010; Zehr et al., 1998; Taylor et al., 1990). There are evidence supporting the efficacy of Respiratory Rehabilitation (RR) in the global management of patients with respiratory disease and RR programs are practiced worldwide (Troosters et al., 2005). Moreover, the role of RR in the preoperative setting has been widely investigated in patient with pulmonary disease candidate for lung resection surgery and it is considered a crucial component in the treatment strategy of patient with high surgical risk (Pasqua et al., 2013; Singh et al., 2013; Celli, 2004). PRR has been suggested as an intervention to reduce surgical morbidity but there is not jet an established treatment protocol (Benzo et al., 2012). The aim of this study is to evaluate the impact of short term PRR on the changes of respiratory functions and clinical conditions in patients with malignant lung cancer lesion and reduced respiratory functions, with high risk to develop PPCs.

MATERIALS AND METHODS

Population

This pilot study took place in the Department of Thoracic Surgery at “Santo Spirito” Civil Hospital, Pescara (Italy), from January to April 2018. To be eligible for enrolment in this study, patients should be enlisted for pulmonary resection surgery for lung cancer with FEV1 lower than 61% (Agostini et al. 2010; Licker et al., 2006). A total of 15 patients were included (Table 1). All the patients gave informed written consent to the experimental procedure, which was in accordance with the latest revision of the Helsinki Declaration for Human Research and with the procedures concerning the privacy protection of subjects participating in biomedical research, as defined by ISO 9001 standards for research and experimentation.

Rehabilitation protocol

All patients were evaluated at admission (T0) and before surgery (T1). The rehabilitation protocol started on the day of admission in hospital and lasted on average after 6 days (until the operation day). In addition to PRR, all patients received optimization of the pharmacological treatment and smoking cessation. Patients were educated to practice deep and slow breathing (deep respiration cycle with prolonged expiration with half closed lips) (Raupach et al., 2008; Westerdahl et al., 2005). Deep and slow breathing helps the removal of secretion and thoracic mobility, highlighting relaxes and dyspnoea control (Hillegass et al., 2001; Hough, 2001). Patients were also trained in mobilization exercises for thorax and the using of respiratory devices (1. Acapella® Choice Vibratory PEP Device, Smiths Medical ASD; Coach 2 ® Incentive Spirometer 4000 ml, Smiths Medical).

In the morning patients were supervised by the physiotherapist during the execution of deep and slow breathing (30 repetitions), during the exercise with respiratory devices (30 repetitions for each device) and in the mobilization exercises for thorax (30 minutes). Then patients underwent cardiorespiratory incremental training on treadmill. Time and speed initially showed in.  During the cardiorespiratory training HR, SpO2 and Dyspnoea (Borg Scale) was monitored. In the afternoon, patients were instructed to perform breathing exercises and respiratory devices. The self-treatment program was organized in five afternoon sessions, one every hour approximately. Each session consisted of: deep and slow breathing (at least 10 repetitions) and exercise with respiratory devices (at least 10 repetitions for each device). In addition, patients should walk in the thoracic ward for 20 minutes in the first 3 days, and 30 minutes in the last 3 days, or alternatively 3000 steps every day (step countered).

Outcome measures

Outcome measures were respiratory functions evaluated with spirometry (Spirolab III ver. 3.4) in particular, FVC and FEV1; functional capacity measured with 6 Minute Walk Test (6MWT) according to American Thoracic Society recommendations (ATS Committee, 2002). In order to evaluate the quality of the postoperative course we compared our study group with a representative control group of patients admitted in the same Department of Thoracic Surgery at “Santo Spirito” Civil Hospital – Pescara (Italy), from January to April 2017 (same period of the study group, but one year before). From the clinic records and inclusion criteria it was selected 17 patients (Table 2). This group did not receive PRR.

Statistical analysis

Computations have been performed using the NCSS© for Windows statistical software package (NCSS© LLC, version 9, Kaysville, UT). Data are expressed as mean ± standard deviation (SD). Results were compared by Wilcoxon’s signed rank test (paired sample), or by Wilcoxon’s Rank Sum Test (two sample), or by Fisher’s exact test. A p value less than 0,05 was considered significant.

Tab. 1
Tab. 2

RESULTS

All 15 patients successfully completed the PRR protocol. There was a statistically significant increment in the FVC (p=0,004), FEV1 (p<0,001) which is crucial because of the eligibility of patient’ surgery. A significant improvement recorded in all 6MWT parameters that is related to a better cardiorespiratory functionality (Table 3). The comparison between groups showed that the patients of representative control group were hospitalized for a longer period (p<0,05) and a greater number of patients have been subject to PPCs (n.s.) (Figure 1). Only one patient of study group had PPCs (bronchial obstruction).

Tab. 3
Fig. 06.1. Comparison between the study group and the control group. Clinical conditions before surgery are shown in the first row of graphics. Outcome measures are shown in the second row of graphics.

DISCUSSION

The development of a short and feasible PRR protocol is linked to the schedule needs that a Thoracic Surgery Unit requires in a Public Hospital. The positive impact of PRR was investigated in literature. The rehabilitation treatment included breathing exercises, endurance training and using of respiratory devices (Divisi et al., 2013; Mujovic et al., 2013; Bobbio et al., 2007; Cesario et al., 2007; Jones et al., 2007; Spruit et al., 2006). Considering a short period of rehabilitation before surgery, an interesting work comes from Sekine et al. (Sekine et al., 2005) reporting that a 2-week PRR starting on admission in hospital, reduced the length of stay of 22 patients. Again, in this perspective, another study comes from Yanez-Brage, which included 263 patients treated with thoracic surgery who received only one day of PRR (incentive spirometry, deep breathing, coughing exercises and education on early postoperative ambulation). This article proved that the incidence of postoperative atelectasis was significantly reduced to 50% (Yanez-Brage et al., 2009). Our protocol for patients with lung malignant tumour lesion, admitted and enlisted for thoracic surgery, with reduced respiratory functionality and at high risk for PPCs, showed interesting results about the respiratory functions and clinical postoperative status. It achieved a reduction of length of hospital stay and number of patients with PPCs, with significant decrement of expenses. A rehabilitation based on educational treatment is not enough (Reid et al., 2010). Indeed, this pilot study integrated aerobic and mobilization exercises, breathing and educational aspects in an intensive system were patients being supervised and self-treated. Anyway, the positive response we received from patients’ diaries on supports the importance of their education. If correctly educated on how to perform the assignments, patients gained self confidence in their possibilities and abilities. They also became able to repeat them in the postoperative phase without problems or pain. This allows fostering their autonomy during the rehabilitation process and in preparation for surgery. In this hypothesis, patients were encouraged to become an active participant in this preparation program for the surgery. Self-efficacy has been identified as an important mediator of behavioural changes, especially in patients with COPD and cancer (Jerant et al., 2011; Lemmens et al., 2008; Van Weert et al., 2007). Furthermore, recent studies recommend promoting self-efficacy even during respiratory rehabilitation (Bentsen et al., 2010; Janssen et al., 2010). The practice of slow and deep breathing (reducing the respiratory ratio and prolonging expiration phase) showed benefits in patients with COPD, decreasing sympathetic tone (Raupach et al., 2008). In our experience, this practice leads the patients of the study group to better manage the postoperative pain (Friesner et al., 2006), improving the quality of the postoperative period (Kshettry et al., 2008). The cardiorespiratory aerobic training enhances cardio respiratory functions with important implications for the postoperative course (Jones et al., 2007). The positive results in a short feasible PRR protocol, which could become a useful method to improve functional status for inpatients enlisted for thoracic surgery. Further trials, with a larger number of patients, could corroborate these findings, and also include the assessment of the follow up of the patients.

CONCLUSIONS

In conclusion, a short feasible PPR protocol for patients with lung malignant tumour lesion, admitted and enlisted for thoracic surgery, with reduced respiratory functionality and at high risk for PPCs could be considered as an efficient treatment for the optimization of the status of patients both pre and post thorax surgery. 

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