Paula Agostini

Postoperative pulmonary complications following thoracic surgery: are there any modifiable risk factors?

Background Postoperative pulmonary complications (PPC) are the most frequently observed complications following lung resection, of which pneumonia and atelectasis are the most common. PPCs have a significant clinical and economic impact associated with increased observed number of deaths, morbidity, length of stay and associated cost. The aim of this study was to assess the incidence and impact of PPCs and to identify potentially modifiable independent risk factors. Methods A prospective observational study was carried out on all patients following lung resection via thoracotomy in a regional thoracic centre over 13 months. PPC was assessed using a scoring system based on chest x-ray, raised white cell count, fever, microbiology, purulent sputum and oxygen saturations. Results Thirty-four of 234 subjects (14.5%) had clinical evidence of PPC. The PPC patient group had a significantly longer length of stay (LOS) in hospital, high dependency unit (HDU) LOS, higher frequency of intensive care unit (ITU) admission and a higher number of hospital deaths. Older patients, body mass index (BMI) ≥30 kg/m2, preoperative activity <400 m, American Society of Anesthesiologists (ASA) score ≥3, smoking history, chronic obstructive pulmonary disease (COPD), lower preoperative forced expiratory volume in 1 s (FEV1) and predicted postoperative (PPO) FEV1 were all significantly (p<0.05) associated with PPC on univariate analysis. Multivariate analysis confirmed that age >75 years, BMI ≥30 kg/m2, ASA ≥3, smoking history and COPD were significant independent risk factors in the development of PPC (p<0.05). Conclusion The clinical impact of PPCs is marked. Significant independent preoperative risk factors have been identified in current clinical practice. Potentially modifiable risk factors include BMI, smoking status and COPD. The impact of targeted therapy requires further evaluation.

Is preoperative physiotherapy/pulmonary rehabilitation beneficial in lung resection patients?

A best evidence topic in thoracic surgery was written according to a structured protocol. The question addressed was whether preoperative physiotherapy/pulmonary rehabilitation is beneficial for patients undergoing lung resection. Ten papers were identified using the reported search, of which five represented the best evidence to answer the clinical question. In 2007 a report showed in 13 subjects receiving a preoperative rehabilitation programme (PRP) an improvement of maximum oxygen uptake consumption (VO(2) max) of an average 2.4 ml/kg/min (95% confidence interval 1-3.8; P=0.002). A report in 2008 showed in 12 patients with chronic obstructive pulmonary disease (COPD) and VO(2) max <15 ml/kg/min that PRP could effect a mean improvement in VO(2) max of 2.8 ml/kg/min (P<0.001). An earlier report in 2005 demonstrated a reduced length of hospital stay (21±7 days vs. 29±9 days; P=0.0003) in 22 subjects who underwent PRP for two weeks compared with a historical control of 60 patients with COPD. It was shown in 2006 that by using a cross-sectional design with historical controls that one day of chest physiotherapy comprising inspiratory and peripheral muscle training compared with routine nursing care was associated with a lower atelectasis rate (2% vs. 7.7%) and a median length of stay that was 5.73 days vs. 8.33 days (P<0.0001). A prospective randomised controlled study in 1997, showed that two weeks of PRP followed by two months of postoperative rehabilitation produced a better predicted postoperative forced expiratory volume in one second in the study group than in the control group at three months (lobectomy + 570 ml vs. -70 ml; pneumonectomy + 680 ml vs. -110 ml). We conclude that preoperative physiotherapy improves exercise capacity and preserves pulmonary function following surgery. Whether these benefits translate into a reduction in postoperative pulmonary complication is uncertain.

Effectiveness of incentive spirometry in patients following thoracotomy and lung resection including those at high risk for developing pulmonary complications

Background Following thoracotomy, patients frequently receive routine respiratory physiotherapy which may include incentive spirometry, a breathing technique characterised by deep breathing performed through a device offering visual feedback. This type of physiotherapy is recommended and considered important in the care of thoracic surgery patients, but high quality evidence for specific interventions such as incentive spirometry remains lacking. Methods 180 patients undergoing thoracotomy and lung resection participated in a prospective single-blind randomised controlled trial. All patients received postoperative breathing exercises, airway clearance and early mobilisation; the control group performed thoracic expansion exercises and the intervention group performed incentive spirometry. Results No difference was observed between the intervention and control groups in the mean drop in forced expiratory volume in 1 s on postoperative day 4 (40% vs 41%, 95% CI −5.3% to 4.2%, p=0.817), the frequency of postoperative pulmonary complications (PPC) (12.5% vs 15%, 95% CI −7.9% to 12.9%, p=0.803) or in any other secondary outcome measure. A high-risk subgroup (defined by ≥2 independent risk factors; age ≥75 years, American Society of Anaesthesiologists score ≥3, chronic obstructive pulmonary disease (COPD), smoking status, body mass index ≥30) also demonstrated no difference in outcomes, although a larger difference in the frequency of PPC was observed (14% vs 23%) with 95% CIs indicating possible benefit of intervention (−7.4% to 2.6%). Conclusions Incentive spirometry did not improve overall recovery of lung function, frequency of PPC or length of stay. For patients at higher risk for the development of PPC, in particular those with COPD or current/recent ex-smokers, there were larger observed actual differences in the frequency of PPC in favour of the intervention, indicating that investigations regarding the physiotherapy management of these patients need to be developed further.

Pulmonary rehabilitation programme for patients undergoing curative lung cancer surgery.

OBJECTIVES The aim of the study was to develop a multistranded pragmatic rehabilitation programme for operable lung cancer patients, that looks into feasibility, process indicators, outcome measures, local adaptability, compliance and potential cost benefit. METHODS An outpatient-based complex intervention, rehabilitation for operated lung cancer (ROC) programme, was developed to optimize physical status, prepare for the inpatient journey and support through recovery after surgery. It includes exercise classes, smoking cessation, dietary advice and patient education and was tested in an enriched cohort study within a regional thoracic unit over 18 months. RESULTS A multistranded pragmatic rehabilitation programme pre- and post-surgery is feasible. Fifty-eight patients received the intervention and 305 received standard care. Both groups were matched for age, lung function comorbidity and type of surgery. Patients in the intervention group attended exercise classes twice a week until surgery, which was not delayed. Patients attended four sessions presurgery (range 1-15), resulting in an improvement of 20 m (range -73-195, P = 0.001) in a 6-min walk test and 0.66 l in forced expiratory volume in 1 s (range -1.85 from 1.11, P = 0.009) from baseline to presurgery. Fifty-four percentage of smokers in the intervention group stopped smoking. Sixteen percentage of patients were identified as being at risk of malnourishment and received nutritional intervention. There was a trend in patients in the intervention group towards experiencing fewer postoperative pulmonary complications than those in the non-intervention group (9 vs 16%, respectively, P = 0.21) and fewer readmissions to hospital because of complications (5 vs 14% respectively, P = 0.12). CONCLUSION Chronic obstructive pulmonary disease-type pulmonary rehabilitation before and after lung cancer surgery is viable, and preliminary results suggest improvement in physical measures. A multicentre, randomized controlled trial is warranted to confirm clinical efficacy. ISRCTN REGISTRATION NUMBER ISRCTN00061628.

Long-term impact of developing a postoperative pulmonary complication after lung surgery

Introduction Postoperative pulmonary complications (PPC) such as atelectasis and pneumonia are common following lung resection. PPCs have a significant clinical impact on postoperative morbidity and mortality. We studied the long-term effects of PPCs and sought to identify independent risk factors. Methods A prospective observational study involved all patients following lung resection in a regional thoracic centre over 4 years. PPCs were assessed daily in hospital using the Melbourne group scale based on chest X-ray, white cell count, fever, purulent sputum, microbiology, oxygen saturations, physician diagnosis and intensive therapy unit (ITU)/high-dependency unit readmission. Follow-up included hospital length of stay (LOS), 30-day readmissions, and mortality. Results 86 of 670 patients (13%) who had undergone a lung resection developed a PPC. Those patients had a significantly longer hospital LOS in days (13, 95% CI 10.5–14.9 vs 6.3, 95% CI 5.9 to 6.7; p<0.001) and higher rates of ITU admissions (28% vs 1.9%; p<0.001) and 30-day hospital readmissions (20.7% vs 11.9%; p<0.05). Significant independent risk factors for development of PPCs were COPD and smoking (p<0.05), not age. Excluding early postoperative deaths, developing a PPC resulted in a significantly reduced overall survival in months (40, 95% CI 34 to 44 vs 46, 95% CI 44 to 47; p=0.006). Those who developed a PPC had a higher rate of non-cancer-related deaths (11% vs 5%; p=0.020). PPC is a significant independent risk factor for late deaths in non-small cell lung cancer patients (HR 2.0, 95% CI 1.9 to 3.2; p=0.006). Conclusions Developing a PPC after thoracic surgery is common and is associated with a poorer long-term outcome.

Chest Physiotherapy in Lung Resection Patients: State of the Art

The role of chest physiotherapy in limiting postoperative pulmonary complications and in the recovery of pulmonary function and exercise capacity after lung surgery is still unclear because of the lack of conclusive, well-designed clinical trials. In this article the available literature on these topics is reviewed, and the effects of respiratory physiotherapy, instituted preoperatively or administered after surgery to patients undergoing lung resection, are commented on. The authors conclude that chest physiotherapy improves preoperative exercise capacity; this is a parameter highly predictive of postoperative pulmonary complications. Also physiotherapy administered during the immediate period after lung resection probably decreases frequency of pulmonary complications. Finally, further investigation is required for a better understanding of the effects of long-term chest physiotherapy after hospital discharge in lung resection patients.

Thoracoscore fails to predict complications following elective lung resection

The Thoracoscore mortality risk model has been incorporated into the British Thoracic Society guidelines on the radical management of patients with lung cancer. The discriminative and predictive ability to predict mortality and post-operative pulmonary complications (PPCs) in this group of patients is uncertain. A prospective observational study was carried out on all patients following lung resection via thoracotomy in a regional thoracic centre over 42 months. 128 out of 703 subjects developed a PPC. 16 (2%) patients died in hospital. In a logistic regression analysis the Thoracoscore was not a significant predictor of mortality (OR 1.07, 95% CI 0.99–1.17; p=0.11) but was a significant predictor of PPCs (OR 1.08, 95% CI 1.03–1.13; p=0.002). However, the area under the receiver operator characteristic curve for the Thoracoscore was 0.68 (95% CI 0.56–0.80) for predicting mortality and 0.64 (95% CI 0.59–0.69) for PPCs, indicating limited discriminative ability. In a logistic regression analysis, another risk model, the European Society Objective Score, was predictive of mortality (OR 1.43, 95% CI 1.11–1.83; p=0.006) and PPCs (OR 1.48, 95% CI 1.30–1.68; p<0.0001). Therefore, Thoracoscore may have poor discriminative and predictive ability for mortality and PPCs following elective lung resection.

Postoperative pulmonary complications and rehabilitation requirements following lobectomy: a propensity score matched study of patients undergoing video-assisted thoracoscopic surgery versus thoracotomy

OBJECTIVES : Video-assisted thoracoscopic surgical (VATS) lobectomy is increasingly used for curative intent lung cancer surgery compared to open thoracotomy due to its minimally invasive approach and associated benefits. However, the effects of the VATS approach on postoperative pulmonary complications (PPC), rehabilitation and physiotherapy requirements are unclear; our study aimed to use propensity score matching to investigate this. METHODS Between January 2012 and January 2016 all consecutive patients undergoing lobectomy via thoracotomy or VATS were prospectively observed. Exclusion criteria included VATS converted to thoracotomy, re-do thoracotomy, sleeve/bilobectomy and tumour size >7 cm diameter (T3/T4). All patients received physiotherapy assessment on postoperative day 1 (POD1), and subsequent treatment as deemed appropriate. PPC frequency was measured daily using the Melbourne Group Scale. Postoperative length of stay (LOS), high dependency unit (HDU) LOS, intensive therapy unit (ITU) admission and in-hospital mortality were observed. Propensity score matching (PSM) was performed using previous PPC risk factors (age, ASA score, body mass index, chronic obstructive pulmonary disease, current smoking) and lung cancer staging. RESULTS Over 4 years 736 patients underwent lobectomy with 524 remaining after exclusions; 252 (48%) thoracotomy and 272 (52%) VATS cases. PSM produced 215 matched pairs. VATS approach was associated with less PPC (7.4% vs 18.6%; P  < 0.001), shorter median LOS (4 days vs 6; P  < 0.001), and a shorter median HDU LOS (1 day vs 2; P  = 0.002). Patients undergoing VATS required less physiotherapy contacts (3 vs 6; P  < 0.001) and reduced therapy time (80 min vs 140; P  < 0.001). More patients mobilized on POD1 (84% vs 81%; P  = 0.018), and significantly less physiotherapy to treat sputum retention and lung expansion was required ( P  < 0.05). CONCLUSIONS This study demonstrates that patients undergoing VATS lobectomy developed less PPC and had improved associated outcomes compared to thoracotomy. Patients were more mobile earlier, and required half the physiotherapy resources having fewer pulmonary and mobility issues.

Is prophylactic minitracheostomy beneficial in high-risk patients undergoing thoracotomy and lung resection?

A best evidence topic in thoracic surgery was written according to a structured protocol. The question addressed was whether prophylactic minitracheostomy (PM) is beneficial in high-risk patients undergoing thoracotomy and lung resection. Altogether, 115 papers were found using the reported search, of which four represented the best evidence to answer the question. Three randomised controlled trials (RCT) compared a total of 161 patients who underwent thoracotomy and received either PM or standard postoperative treatment alone. Another non-RCT of 144 patients observed the reduction of toilet bronchoscopy with the increased use of PM. These are summarised in the Table. The studies assessed the benefit of PM inserted immediately after lung resection surgery in patients perceived as at high-risk of developing pulmonary complications. High-risk defined patients as those who smoked, have poor lung function, ischaemic heart disease, chronic obstructive pulmonary disease, absence/failure of regional analgesia, and/or cerebrovascular accident. In the largest randomised study (102 patients), Bonde et al. [Bonde P, Papachristos I, McCraith A, Kelly B, Wilson C, McGuigan JA, McManus K. Sputum retention after lung operation: prospective randomized trial shows superiority of prophylactic minitracheostomy in high-risk patients. Ann Thorac Surg 2002;74:196-202] concluded that the PM group had a significant reduction in sputum retention and postoperative atelectasis. The authors also reported a reduction in the incidence of pneumonia and toilet bronchoscopy but this did not achieve statistical significance. Issa et al. [Issa MM, Healy DM, Maghur HA, Luke DA. Prophylactic minitracheotomy in lung resection. A randomized controlled study. J Thorac Cardiovasc Surg 1991;101:895-900] were able to demonstrate a significant reduction in the rate of pneumonia in the PM group and Randell et al. [Randell TT, Tierala E, Lepäntalo MJ, Lindgren L. Prophylactic minitracheostomy: a prospective, random control, clinical trial. Eur J Surg 1991;157:501-504] showed a significant reduction in postoperative atelectasis and toilet bronchoscopy in their PM group. Au et al. [Au J, Walker WS, Inglis D, Cameron EW. Percutaneous cricothyroidostomy (minitracheostomy) for bronchial toilet: results of therapeutic and prophylactic use. Ann Thorac Surg 1989;48:850-852] observed a reduction in toilet bronchoscopy from 9% to 4% in a four-year period; however, the authors could not directly relate this to the use of PM but believed it was likely. None of the studies demonstrated a statistical difference in mortality or intensive care unit or hospital length of 38 stay. All the studies reported some complications associated with minitracheostomy (MT) insertion, the incidence of which ranged from 5.6% to 57%. One percent of 227 patients who received MT in the studies experienced a life-threatening complication, the rest were minor and easily controlled. None of the complications resulted in death.

S28 Is a pulmonary rehabilitation programme for patients undergoing curative lung cancer surgery feasible

Introduction and objectives The new BTS lung cancer surgery guidelines mention patient optimisation to reduce risk. Our aim was to develop a multi-stranded pragmatic rehabilitation programme for this group of patients, apply it in a pilot study and look at feasibility, process indicators, outcome measures, local adaptability, compliance and potential cost benefit. Methods An outpatient based complex intervention was developed by doctors, allied health professional and patients to optimise physical status, prepare for inpatient journey and support through recovery after surgery. Tested in an enriched cohort study over 11 months 45 patients received the intervention compared to 198 who received standard care. Results Potential surgical candidates at a regional thoracic unit were identified early at lung cancer multidisciplinary team meetings and enrolled on a COPD-type rehabilitation programme which included exercise classes, smoking cessation, dietary advice and patient education. Patients attended exercise classes twice a week until surgery, (which was not delayed). On average patients waited 7 days (range 0–29) to be seen in a rehabilitation class and attended on 5 sessions (range 1–12) resulting in 39 m improvement in 6-minute walk test. The education classes were delivered by lung cancer nurse and addressed diet, smoking, lifestyle change, inpatient expectations, preparation for discharge, and pain management. Six patients identified as potentially or at risk of being malnourished received nutritional supplementation. 5 out of 10 current smokers agreed to be fast tracked into locally available smoking cessation pathways and were biochemically proven to have given up. In the two referring hospitals one delivered classes in outpatient individualised setting while the other in community based group class. An additional four patients following further investigations did not receive surgery. Both groups were matched for age, lung function comorbidity and type of surgery and outcomes are presented in Abstract S28 table 1. The intervention resulted in cash releasing saving to the PCT of £938 per patient.Abstract S28 Table 1 Intervention (n=45) Non Intervention (n=198) p Value PPC rate % 11.1 16.2 0.08 ITU admission % 2.2 3 Hospital LOS 5 5 Readmission rate % 4.4 13.6 0.08 Comparison of primary outcome measures of enriched cohort study in patients who received the intervention compared to those who received standard care. Readmission to hospital within 30 days due to complications secondary to surgery. PPC, postoperative pulmonary complications defined by Melbourne group scale; LOS, length of stay. Conclusion A viable outpatient based complex intervention pathway of enhanced recovery/pulmonary rehabilitation has been developed and tested. Initial results are promising but a multicentre randomised controlled trial is warranted to test efficacy.