Tailoring prehabilitation to address the multifactorial nature of functional capacity for surgery

A multimodal prehabilitation class for Enhanced Recovery After Surgery: a pragmatic randomised type 1 hybrid effectiveness-implementation trial

BACKGROUND

Prehabilitation promotes postoperative recovery through preoperative optimisation; however, few studies have been conducted under real-world conditions. Our objective was to determine the extent to which a multimodal prehabilitation programme influenced intermediate and late recovery post-colorectal surgery in a type 1 effectiveness-implementation and randomised pragmatic trial. We hypothesised that a prehabilitation class, as part of an Enhanced Recovery After Surgery (ERAS) pathway, would reduce length of hospital stay (LOS).

METHODS

Adult male and female patients with colorectal disease requiring an elective primary resection at a single centre were randomised to the intervention or standard care group at least 2 weeks before surgery. All participants attended an ERAS class, which was extended to include prehabilitation components of nutrition education, supplements, walking with a smartwatch, functional exercises, and deep breathing in the intervention group. Effectiveness outcomes included LOS (primary) and 6-min walking distance (6MWD; secondary outcome) at 6 weeks post-surgery. Implementation outcomes included adherence to prescribed step count and nutrient intakes. Multivariable regression analyses were adjusted for age, sex, type of surgery, and COVID-19.

RESULTS

The study ended prematurely. In total, 110 patients were included. Two-thirds had cancer and mean prehabilitation duration was 17.2 (sd 5.5) days. LOS was not different between groups. Preoperative median step count did not differ between groups, but protein inadequacy (prevalence ratio: 0.59 [95% CI: 0.36-0.82]) decreased substantially with prehabilitation. After surgery, the mean difference in 6MWD was +38 m (95% CI: 9-67 m) for prehabilitation vs control, indicating earlier functional recovery.

CONCLUSIONS

A pragmatic prehabilitation programme did not influence length of hospital stay (underpowered because of early trial termination), but did reduce preoperative protein inadequacy (implementation outcome) and improve early functional recovery (secondary outcome).

CLINICAL TRIAL REGISTRATION

ClinicalTrials.gov (NCT04247776).

Feasibility of a virtual multimodal prehabilitation intervention for patients with cancer undergoing surgery

BACKGROUND AND AIMS

Current prehabilitation programs are often limited by poor recruitment and attrition rates. Remote delivery of prehabilitation may reduce barriers to participation and maximize program retention. We aimed to assess the feasibility (uptake, retention, fidelity), preliminary effectiveness, and acceptability of delivering a technology-supported prehabilitation program remotely to oncologic surgical candidates.

METHODS

This was a one-arm pragmatic feasibility study aiming to follow patients for 4-6 weeks preoperatively and 8 weeks postoperatively. All patients received a home-based aerobic and resistance exercise program, with psychosocial counselling as needed. Those at risk of malnutrition received nutritional counselling and supplements to meet personalized energy and protein targets. Adherence was assessed using an exercise watch and a mobile application for dietary assessment. In addition, we assessed physical effects, with change in 6-min walking distance of 20m defined as clinically meaningful recovery, and post-operative complications. Acceptability was assessed using a convergence mixed-methods approach.

RESULTS

A total of 28 participants were included (median 69, IQR 9.5 years; 12/28, 43 % males). Rate of recruitment was 47 %, retention was 78 %, and attendance was 86-93 %. Participants walked an average of 8168 (SD: 4685) steps per day preoperatively and 6809 (SD: 4819) steps per day postoperatively. They consumed on average 21.6 kcal/kg of ideal body weight (IBW) and 1.1 g protein/kg IBW during the first week of the intervention. Participants demonstrated significant improvements in remote physical tests before surgery (arm strength: +9.7 [5.7, 13.6] repetitions in arm curl, p < 0.001; leg strength: +3.2 [1.4, 4.9] sit-to-stand repetitions in 30 s, p = 0.001; endurance: +19.4 [12.7, 26.1] repetitions in the 2-min step test, p < 0.001). The majority (16/22, 73 %) achieved clinically meaningful recovery at 8 weeks postoperatively. All participants attested to the acceptability of exercising with remote supervision.

CONCLUSION

A technology-assisted prehabilitation program delivered remotely is feasible and could lead to physical benefits for a surgical cancer population.

Can we "prehabilitate" pancreatic cancer patients prior to surgery? A critical appraisal of the literature

BACKGROUND

Enhancing a patient's functional capacity to withstand the surgical stress by means of multimodal (combined exercise, nutrition and psychological interventions) prehabilitation may potentially lead to improved outcomes in pancreatic cancer surgery.

METHODOLOGY

A systematic review was undertaken searching PubMed, Google Scholar and Cochrane Library databases, exploring the impact of prehabilitation in pancreatic surgery. Outcomes of interest were adherence to the prehabilitation, functional capacity, overall complications and post-operative length of stay. Pooled analysis was performed using a random-effects model.

RESULTS

Twelve studies comprising of 1497 patients were included in the review. Most of the studies seem to lack a multimodal approach. Less than 50 % of the studies reported adherence, which ranged between 27 and 100 %. Functional capacity, in terms of 6-min walk test, showed improvement with prehabilitation. Among the post-operative outcomes, prehabilitation was associated with significant improvement in pulmonary complications (2.4 % versus 6.7 %, RR 0.36, CI 0.17-0.74, p = 0.01, I2 = 28%). Prehabilitation was not effective in terms of length of stay or readmission rates.

CONCLUSIONS

Larger studies with multimodal prehabilitation approaches may demonstrate more consistent and clinically meaningful benefits, which would lead to a firm appreciation of its role the management of pancreatic cancer patients undergoing surgery.

Prehabilitation: Who can benefit?

Prehabilitation is an intervention that occurs between cancer diagnosis and the start of an acute treatment. It involves physical, nutritional, and psychological assessments to establish a baseline functional level and provide targeted interventions to improve a person's health and prevent future impairments. Prehabilitation has been applied to surgical oncology and has shown positive results at improving functional capacity, reducing hospital stay, decreasing complications, and enhancing health-related quality of life. The importance of collaboration between various healthcare professionals and the implementation of multimodal interventions, including exercise training, nutrition optimization, and emotional support is discussed in this manuscript. The need for screening and assessment of conditions such as sarcopenia, frailty, or low functional status in order to identify patients who would benefit the most from prehabilitation is vital and should be a part of all prehabilitation programs. Exercise and nutrition play complementary roles in prehabilitation, enhancing anabolism and performance. However, in the presence of malnutrition and sarcopenia, exercise-related energy expenditure without sufficient protein intake can lead to muscle wasting and further deterioration of functional capacity, thus special emphasis on nutrition and protein intake should be made in these cases. Finally, the challenges and the need for a paradigm shift in perioperative care are discussed to effectively implement personalized prehabilitation programs.

Nutritional aspects of prehabilitation in adults with cirrhosis awaiting liver transplant

Malnutrition, sarcopenia (low muscle mass), and physical frailty have gained increasing recognition in candidates for liver transplant (LT) as these conditions can impact postoperative functional capacity. Multidimensional prehabilitation programs have been proposed as a safe intervention in adults awaiting LT but the nutritional pillar of prehabilitation has been understudied. This review summarizes the nutritional recommendations for prehabilitation for individuals with cirrhosis awaiting LT. Three major aspects of nutritional prehabilitation are discussed: (1) Assess: Evaluate nutritional status and assess for malnutrition, sarcopenia, and frailty to guide the nutritional prehabilitation intervention intensity, increasing across universal, targeted, and specialist levels; (2) Intervene: Prescribe a nutritional prehabilitation intervention to meet established nutrition guidelines in cirrhosis with a targeted focus on improving nutritional status and muscle health; (3) Reassess: Follow-up based on the required intensity of nutritional care with as needed intervention adjustment. Topics covered in the review include nutritional care levels for prehabilitation, energy prescriptions across body mass index strata, detailed considerations around protein intake (amount, distribution, and quality), carbohydrate and fat intake, other nutritional considerations, and the potential role of dietary supplements and nutraceuticals. Future research is warranted to more accurately evaluate energy needs, evaluate emerging dietary supplementation strategies, and establish the role of nutraceuticals alongside food-based interventions. While the general principles of nutritional prehabilitation are ready for immediate application, future large-scale randomized controlled trials in this space will help to quantify the benefit that can be gained by transitioning the LT approach from passive "transplant waitlist time" to active "transplant preparation time."

Nutritional risk predicts postoperative complications and length of stay, whereas sarcopenia risk predicts need for step-down care in a mixed elective surgery population

BACKGROUND

Malnutrition and poor functional reserves place patients at risk for negative surgical outcomes. In this prospective study we aimed to measure preoperative nutritional and sarcopenia risk and evaluate their impact on postoperative outcomes.

METHODS

Adults scheduled to undergo elective general and gastrointestinal surgery were screened for nutrition risk using the Malnutrition Universal Screening Tool screening tool. Sarcopenia risk was measured using the SARC-F tool and hand-grip strength. Patients were followed postoperatively. Incidence of complications, length of stay (LOS), readmission rates, and need for step-down care were recorded.

RESULTS

One hundred and twenty-two patients were included. Mean age was 53.8 years (standard deviation [SD] 16.44). Sixty-six (54%) were scheduled for day-case procedures, and 56 (46%) for nonday-case procedures. About 18.9% (n = 23) were at nutritional risk preoperatively. Ten patients (8.2%) had probable sarcopenia based on SARC-F, whereas seven (5.7%) had measurably reduced HG. Incidence of postoperative complications was 23.8% (n = 29). Nutrition risk was associated with the development of complications (p = 0.018). In the nonday-case group, nutritional risk was associated with greater LOS (p = 0.013). Older age was associated with need for step-down care (p = 0.002) as was SARC-F (p = 0.003).

CONCLUSIONS

Preoperative nutritional screening can predict postoperative complications and LOS, whereas sarcopenia screening is predictive of the need for step-down care after discharge. Screening tools are quick and inexpensive and could provide valuable information to clinicians and allow patients the opportunity to enhance their physical preparedness for surgery thereby mitigating their risk for negative surgical outcomes.

Potential mechanisms of multimodal prehabilitation effects on surgical complications: a narrative review

Continuous advances in prehabilitation research over the past several decades have clarified its role in improving preoperative risk factors, yet the evidence demonstrating reduced surgical complications remains uncertain. Describing the potential mechanisms underlying prehabilitation and surgical complications represents an important opportunity to establish biological plausibility, develop targeted therapies, generate hypotheses for future research, and contribute to the rationale for implementation into the standard of care. In this narrative review, we discuss and synthesize the current evidence base for the biological plausibility of multimodal prehabilitation to reduce surgical complications. The goal of this review is to improve prehabilitation interventions and measurement by outlining biologically plausible mechanisms of benefit and generating hypotheses for future research. This is accomplished by synthesizing the available evidence for the mechanistic benefit of exercise, nutrition, and psychological interventions for reducing the incidence and severity of surgical complications reported by the American College of Surgeons National Surgical Quality Improvement Program (ACS-NSQIP). This review was conducted and reported in accordance with a quality assessment scale for narrative reviews. Findings indicate that prehabilitation has biological plausibility to reduce all complications outlined by NSQIP. Mechanisms for prehabilitation to reduce surgical complications include anti-inflammation, enhanced innate immunity, and attenuation of sympathovagal imbalance. Mechanisms vary depending on the intervention protocol and baseline characteristics of the sample. This review highlights the need for more research in this space while proposing potential mechanisms to be included in future investigations.