Rationale and indications for preoperative feeding of malnourished surgical cancer patients

Perioperative Nutritional Support: A Review of Current Literature

Since the beginning of the practice of surgery, the reduction of postoperative complications and early recovery have been two of the fundamental pillars that have driven the improvement of surgical techniques and perioperative management. Despite great advances in these fields, the rationalization of antibiotic prophylaxis, and other important innovations, postoperative recovery (especially in elderly patients, oncological pathology or digestive or head and neck surgery) is tortuous. This can be explained by several reasons, among which, malnutrition has a major role. Perioperative nutritional support, included within the ERAS (Enhanced Recovery After Surgery) protocol, has proven to be a main element and a critical step to achieve better surgical results. Starting with the preoperative nutritional assessment and treatment in elective surgery, we can improve nutritional status using oral supplements and immunomodulatory formulas. If we add early nutritional support in the postoperative scenario, we are able to significantly reduce infectious complications, need for intensive care unit (ICU) and hospital stay, costs, and mortality. Throughout this review, we will review the latest developments and the available literature.

Development and Validation of Cutoff Value for Reduced Muscle Mass for GLIM Criteria in Patients with Gastrointestinal and Hepatobiliary-Pancreatic Cancers

The Global Leadership Initiative on Malnutrition (GLIM) criteria recommends using race- and sex-adjusted cutoff values for reduced muscle mass (RMM), but the only cutoff values available for Asians are the skeletal muscle mass index (SMI) established by the Asian Working Group for Sarcopenia (AWGS). This retrospective study aimed to develop and validate cutoff values for the fat-free mass index (FFMI) and arm circumference (AC) of Asians, and to investigate the association between GLIM malnutrition and prognosis. A total of 660 patients with primary gastrointestinal (GI) and hepatobiliary-pancreatic (HBP) cancers who underwent their first resection surgery were recruited and randomly divided into development and validation groups. The FFMI and AC cutoff values were calculated by receiver operating characteristic curve analysis for the AWGS SMI as the gold standard. The cutoff values for each RMM were used to diagnose malnutrition on the basis of GLIM criteria, and the survival rates were compared. The optimal FFMI cutoff values for RMM were 17 kg/m2 for men and 15 kg/m2 for women, and for AC were 27 cm for men and 25 cm for women. In the validation group, the accuracy of the FFMI and AC cutoff values to discriminate RMM were 85.2% and 68.8%, respectively. Using any of the three measures of RMM, overall survival rates were significantly lower in the GLIM malnutrition group. In conclusion, the cutoff values for the FFMI and AC in this study could discriminate RMM, and GLIM malnutrition using these cutoff values was associated with decreased survival.

Malnutrition by European Society for Clinical Nutrition and Metabolism criteria predicts prognosis in patients with gastrointestinal and hepatobiliary-pancreatic cancer

BACKGROUND & AIMS

The European Society for Clinical Nutrition and Metabolism (ESPEN) proposed the ESPEN diagnostic criteria (EDC) for malnutrition in 2015. There is no report on the association between the EDC and prognosis in patients with gastrointestinal (GI) and hepatobiliary-pancreatic (HBP) cancer. This study aimed to (1) determine the prevalence of EDC malnutrition, (2) investigate the validity of the EDC as a nutritional and prognostic indicator, and (3) examine which components of the EDC are most related to long-term prognosis in patients with GI and HBP cancers.

METHODS

A total of 634 patients with primary GI and HBP cancers who underwent their first resection surgery between July 2014 and March 2018 were retrospectively recruited. According to the EDC, patients were divided into malnourished and non-malnourished groups. Clinical parameters and survival between these two groups were compared. The prognostic effects of the EDC and the EDC components were analyzed using Cox proportional hazard models.

RESULTS

The prevalence of EDC malnutrition was 22%. Anthropometric data and biochemical data were associated with EDC malnutrition. The 5-year survival rate was lower in the malnourished group (72%) than in the non-malnourished group (73%; P = 0.007). The multivariate analysis demonstrated that the malnourished group was an independent risk factor for mortality (hazard ratio = 1.70 in the malnourished group; 95% confidence interval 1.08-2.63; P = 0.024). Among EDC components, body mass index (BMI) of <18.5 kg/m² was an independent poor prognostic factor.

CONCLUSIONS

EDC malnutrition is associated with poor postoperative long-term prognosis. Among the EDC components, BMI of <18.5 kg/m² is most associated with prognosis in patients with preoperative GI and HBP cancers.

Reassessment of the Role of Enteral Tube Feedings for Patients with Esophageal Cancer

Nutrition is important for patients with esophageal cancer because dysphagia can be exacerbated by chemoradiotherapy. Some centers suggest routine enteral tube placement (TF) to facilitate nutrition. This investigation was to evaluate the use of TF access for patients undergoing multi-modality therapy for esophageal carcinoma. This retrospective study analyzed 113 patients who underwent esophagectomy and 97 patients who underwent definition chemoradiotherapy for esophageal cancer between 2001 and 2013. Throughout this time period, a strategy for selective tube placement was used. Nutrition was assessed through absolute lymphocyte counts, protein, and albumin levels. A total of 28 (30%) patients during preoperative chemoradiotherapy and 31 (32%) of those undergoing definitive chemoradiation received TFs. There were 16 Dobhoff tubes, 28 gastrostomy tubes, and 15 jejunostomies. Tubes were maintained an average of 3.9 months with 20 (34%) of these patients reporting tube-related complications. At the time of surgery, there was no statistical difference in any of the nutritional assessments between those patients who received TF and those who did not. Both groups experienced similar total postoperative complication rates (64% vs 65%) and similar median length of hospital stay (12 to 13 days). Chemoradiotherapy resulted in decreased nutritional parameters; however, there was no difference in the degree of reduction between those who underwent TF and those who did not. The data show that routine placement of enteral access is not necessary for esophageal carcinoma. In fact, the risks of placing enteral access may outweigh the benefits. Administration of TF should be restricted to select patients during chemoradiotherapy or before esophagectomy.

Impact of phase angle on postoperative prognosis in patients with gastrointestinal and hepatobiliary-pancreatic cancer

OBJECTIVE

Phase angle (PhA), by bioelectrical impedance analysis, has been used in patients with several diseases; however, its prognostic value in patients with gastrointestinal (GI) and hepatobiliary-pancreatic (HBP) cancer is unclear. The aim of the present study was to investigate the effects of PhA on postoperative short- outcomes and long-term survival in these patients.

METHODS

This retrospective study reviewed data from 501 patients with GI and HBP cancers who underwent first resection surgery. The data were divided into the following groups according to the preoperative PhA quartile values by sex: high-PhA group with the highest quartile (Q4), normal-PhA group with middle quartiles (Q3 and Q2), and low-PhA group with the lowest quartile (Q1). Preoperative nutritional statuses, postoperative short-term outcomes during hospitalization, and 5-y survival between three groups were compared. Cox proportional hazard models were used to evaluate the prognostic effect of PhA.

RESULTS

PhA positively correlated with body weight, skeletal muscle mass, and handgrip strength, and negatively correlated with age and levels of C-reactive protein. The low-PhA group showed a higher prevalence of malnutrition (48%) than normal-PhA (25%), and high-PhA groups (9%; P < 0.001). The incidence of postoperative severe complications was 10% for all patients (14% in low-PhA, 12% in normal-PhA, and 4% in high-PhA; P = 0.018). The incidence of prolonged stays in a postoperative high-care or intensive care unit was 8% in all patients (16% in low-PhA, 8% in normal-PhA, and 2% in high-PhA; P < 0.001). The 5-y survival rate was 74% in all patients (68% in low-PhA, 74% in normal-PhA, and 79% in high-PhA; P < 0.001). The multivariate analysis demonstrated that a low-PhA group was an independent risk factor for mortality (hazard ratio, 1.99; 95% confidence interval, 1.05-3.90; P = 0.034).

CONCLUSION

PhA is a useful short-term and long-term postoperative prognostic marker for patients with GI and HBP cancers.

Effective nutritional status screening in orthopaedic oncology patients and post-operative complications

PURPOSE

This study aims to determine the prevalence of malnutrition among orthopaedic oncology patients with malignant tumour during preoperative period.

METHODS

This is a prospective observational study involving patients from the orthopaedic oncology unit who were undergoing surgery. They were assessed with Patient Generated Subjective Global Assessment (PG-SGA), Malnutrition Screening Tool (MST) and 3-minute Nutritional Screening (3MinNS) questionnaires. Anthropometric data such as body mass index, mid upper arm circumference (MUAC) and blood parameters such as serum albumin, total lymphocyte count and haemoglobin were also investigated. Patients were then followed up for 3 months. Post-operative complications were divided into infectious and non-infectious groups. Length of stay and unplanned readmission were also documented.

RESULTS

Prevalence of malnutrition ranged from 13.3% to 45.8% under different nutritional assessment methods. Patients who were determined as malnourished were significantly associated with both infectious and non-infectious post-operative complications ( p < 0.001). PG-SGA and 3MinNS values were also significant in univariate and multivariate analysis, respectively. Low serum albumin (<35 g/L) was associated with post-operative infectious complications, especially surgical site infection ( p < 0.001), prolonged hospital stay ( p = 0.009) and unplanned readmission ( p = 0.017). 3MinNS and Charlson Comorbidity Index were predictive of non-infectious complications, whereas serum albumin and the presence of metastasis were predictive of infectious complications.

CONCLUSION

This pilot study of patients with soft tissue and bone sarcoma of upper and lower limbs showed that malnutrition is a significant independent factor related to infectious and non-infectious complications which leads to unplanned readmission and prolonged length of stay. Periodic screening using the PG-SGA or 3MinNS questionnaires, MUAC and evaluation of serum albumin levels is recommended during clinic session and pre-surgery assessment rounds to identify those predisposed to malnutrition and help in reducing incidence of post-operative complications.

[Preconditioning of the liver]

Posthepatectomy liver failure (PHLF) still represents a severe complication after major liver resection associated with a high mortality. In addition to an insufficient residual liver volume various factors play an important role in the pathophysiology of PHLF. These include the quality of the parenchyma, liver function, perfusion, i.e. maintenance of adequate inflow and outflow, as well as the condition of the patient and comorbidities. While the liver volume is relatively easy to evaluate using modern imaging techniques, the evaluation of liver function and liver quality require a differentiated approach. Both factors can be influenced by the constitutional status of the patient, medical history and previous treatment and must be given sufficient consideration in the risk evaluation. An adequate perfusion, e.g. portal and arterial circulation and adequate outflow by at least one hepatic vein as well an adequate biliary drainage should be always guaranteed in order to allow regeneration of the residual liver tissue. Only the understanding of all these aspects will support the surgeon in a correct and safe evaluation of the resectability. Additionally, the liver surgeon should be aware of all available perioperative and postoperative options to treat and to prevent PHLF. In this review article the most important questions regarding the risk factors related to PHLF are presented and the potential therapeutic and prophylactic management is described. The main goal is to ensure functional operability of the patient if oncological resectability is possible. In other words: in the case of correct oncological indication, the liver surgeon should be able to resect what is resectable or, alternatively, make resectable what primarily was not resectable.

The association between the Nutrition-Related index and morbidity following head and neck microsurgery

OBJECTIVES/HYPOTHESIS

Despite consensus that preoperative nutritional assessment is of importance in the head and neck surgical oncology population, it remains unclear how exactly malnutrition is associated with perioperative morbidity especially among those undergoing microvascular surgery. We aimed to study this association to help inform preoperative risk stratification, guide the use of nutritional interventions, and ultimately help prevent malnutrition related morbidity.

STUDY DESIGN

Database analysis.

METHODS

Retrospective, linked analysis of the 2011 to 2016 National Surgical Quality Improvement Program. After identifying eligible patients and stratifying according to the Nutrition-Related Index, a univariate screen of preoperative demographic and clinical covariates was performed. Subsequently, propensity score matching was utilized to control for differences in baseline covariates. Perioperative complications and mortality were then analyzed using the propensity score-matched cohorts.

RESULTS

Among 977 identified patients, 276 (28.2%) were malnourished. Malnourished patients had higher rates of comorbidity, were more likely to actively smoke, and were more likely to have primaries in the oropharynx or hypopharynx/larynx. After propensity score matching to control for confounders, malnourished patients had higher rates of pulmonary complications (21.5% vs. 11.6%, P < .01), higher rates of bleeding or need for transfusion (56.6% vs. 43.0%, P < .01), higher rates of venous thromboembolism (3.7% vs. 0.8%, P = .03), and a higher 30-day mortality rates (3.7% vs. 0.0%, P < .01).

CONCLUSIONS

This nationwide analysis finds that 28.2% of patients undergoing surgery for head and neck cancers with free flap reconstruction are malnourished. Malnourishment was found to be independently associated with postoperative pulmonary complications, bleeding or need for transfusion, and 30-day mortality.

LEVEL OF EVIDENCE

NA Laryngoscope, 130:375-380, 2020.

Preoperative optimization for major hepatic resection

PURPOSE

Major hepatic resections are performed for primary hepatobiliary malignancies, metastatic disease, and benign lesions. Patients with chronic liver disease, including cirrhosis and steatosis, are at an elevated risk of malnutrition and impaired strength and exercise capacity, deficits which cause increased risk of postoperative complications and mortality. The aims of this report are to discuss the pathophysiology of changes in nutrition, exercise capacity, and muscle strength in patient populations likely to require major hepatectomy, and review recommendations for preoperative evaluation and optimization.

METHODS

Nutritional and functional impairment in preoperative hepatectomy patients, especially those with underlying liver disease, have a complex and multifactorial physiologic basis that is not completely understood.

RESULTS

Recognition of malnutrition and compromised strength and exercise tolerance preoperatively can be difficult, but is critical in providing the opportunity to intervene prior to major hepatic resection and potentially improve postoperative outcomes. There is promising data on a variety of nutritional strategies to ensure adequate intake of calories, proteins, vitamins, and minerals in patients with cirrhosis and reduce liver size and degree of fatty infiltration in patients with hepatic steatosis. Emerging evidence supports structured exercise programs to improve exercise tolerance and counteract muscle wasting.

CONCLUSIONS

The importance of nutrition and functional status in patients indicated for major liver resection is apparent, and emerging evidence supports structured preoperative preparation programs involving nutritional intervention and exercise training. Further research is needed in this field to develop optimal protocols to evaluate and treat this heterogeneous cohort of patients.

Nutrition Support for Critically Ill Patients With Cancer

Oncology patients often experience the classic signs of malnutrition-weight loss as well as fat and muscle wasting, which have been associated with poor tolerance to treatment and increased morbidity and mortality. Nutrition status may be an important factor in determining tolerance to treatment and outcomes associated with it. Thus, identification of those with preexisting malnutrition or who are at risk for developing malnutrition is crucial not only at time of cancer diagnosis but also throughout the treatment course so that nutrition interventions may be implemented to prevent development or worsening of malnutrition in this high-risk population. These patients often have extremely complicated hospital courses due to the aggressive nature of the disease and treatment, leading to intensive care unit admission and periods of critical illness. Critical illness is associated with catabolism, extreme stress on the body, and a state of systemic inflammation. During critical illness, it is important to provide adequate nutrition to prevent further break down of lean muscle mass and oxidative cellular injury and to regulate favorable immune responses. The purpose of this review is to discuss the importance of nutrition screening and assessment for the critically ill patient with cancer; to appropriately identify those at risk for, or who have developed, malnutrition; and to provide appropriate interventions to optimize nutrition status. This review also discusses the complications and difficulties associated with feeding this patient population and offers nutrition support recommendations.

Comparison of systemic inflammatory and nutritional scores in colorectal cancer patients who underwent potentially curative resection

BACKGROUND

Various systemic inflammatory and nutritional scores have been reported to predict postoperative outcomes. This study aimed to investigate the best systemic inflammatory and nutritional scores in colorectal cancer (CRC) patients who underwent potentially curative resection.

METHOD

We evaluated 468 consecutive CRC patients in this study. Comparisons of systemic inflammatory and nutritional scores, including the neutrophil to lymphocyte ratio (NLR), platelet to lymphocyte ratio (PLR), prognostic index (PI), prognostic nutritional index (PNI), and modified Glasgow prognostic score (mGPS), were performed using univariate/multivariate analyses for patient survival.

RESULTS

The PNI and mGPS, but not the NLR, PLR, and PI, were significantly associated with overall and relapse-free survival. The mGPS, but not the PNI, was strongly correlated with TNM stage (P < 0.001). Cox multivariate analysis showed that both the PNI and mGPS were exclusive independent prognostic factors for both overall and relapse-free survival (P < 0.001). Furthermore, the PNI status predicted patient survival more clearly than the mGPS in combination with TNM stage.

CONCLUSIONS

This study suggests that the PNI and mGPS are useful predictive scores in CRC patients who undergo potentially curative resection, especially the PNI in combination with TNM stage. Routine evaluation of the host status using the scores may be useful in CRC treatment.

Preoperative modifiable risk factors in colorectal surgery: an observational cohort study identifying the possible value of prehabilitation

BACKGROUND

Colorectal cancer (CRC) is the second most prevalent type of cancer in the world. Surgery is the most common therapeutic intervention, and associated with 20-40% reduction in physiological and functional capacity. Postoperative complications occur in up to 50% of patients resulting in higher mortality rates and greater hospital costs. The number and severity of complications is closely related to patients' preoperative performance status. The aim of this study was to identify the most important preoperative modifiable risk factors that could be part of a multimodal prehabilitation program.

METHODS

Prospectively collected data of a consecutive series of Dutch CRC patients undergoing colorectal surgery were analyzed. Modifiable risk factors were correlated to the Comprehensive Complication Index (CCI) and compared within two groups: none or mild complications (CCI <20), and severe complications (CCI ≥20). Multivariate logistic regression analysis was done to explore the combined effect of individual risk factors.

RESULTS

In this 139 patient cohort, smoking, malnutrition, alcohol consumption, neoadjuvant therapy, higher age, and male sex, were seen more frequently in the severe complications group (CCI ≥20). Patients with severe complications had significantly longer hospital stay (16 vs. 6 days, p < 0.001). The risk for severe complications was increased in patients with ASA score III [adjusted odds ratio (OR) 4.4, 95% CI 1.04-18.6], and hemoglobin level <7 mmol/l (adjusted OR 3.3, 95% CI 1.3-8.2). Compared to having no risk factors, more than one risk factor increased OR of severe complications (crude OR 5.2, 95% CI 1.8-15).

CONCLUSION

This study revealed that the risk of getting severe complications increases with the number of risk factors present preoperatively. Several preoperative patient-related risk factors are modifiable. Multimodal prehabilitation may improve patients' preoperative status and should be tested in a multicenter randomized controlled trial. With an international consortium (Copenhagen, Montreal, Paris, Eindhoven) we initiated a randomized controlled trial (NTR5947).

Influence of nutritional status on the therapeutic effect of infliximab in patients with Crohn's disease

PURPOSE

Crohn's disease (CD) is a refractory inflammatory bowel disease of unknown etiology, frequently complicated by malnutrition. It is thought that the delayed wound healing associated with this malnutrition in CD patients might adversely affect the therapeutic benefits of infliximab (IFX). Therefore, we investigated the effects of nutritional status on IFX treatment.

METHODS

We assessed nutritional status and CD activity when IFX therapy was initiated and following the third dose, 6 weeks later. Nutritional status was assessed using the body mass index (BMI) and nutritional risk index (NRI), whereas CD activity was assessed using the CD activity index (CDAI).

RESULTS

All patients with a BMI ≥ 18.5 kg/m(2) at the time of IFX therapy met the effective criteria for the CDAI, and IFX treatment was considered responsive in these patients. Furthermore, IFX treatment was responsive, with a high level of effectiveness, in all five subjects (31.3 %) with NRI scores of 97.5 and above with no risk of malnutrition (p = 0.037).

CONCLUSIONS

Our results suggest that nutritional status does influence the therapeutic effect of IFX in CD patients. The response rate to IFX treatment thus could be improved by optimizing the nutritional status. We recommend comprehensive nutritional assessment and intervention prior to IFX treatment schedules.

Perioperative catabolism

PURPOSE

This article reviews the pathophysiology, clinical relevance, and therapy of the catabolic response to surgical stress.

PRINCIPLE FINDINGS

The key clinical features of perioperative catabolism are hyperglycemia and loss of body protein, both metabolic consequences of impaired insulin function. Muscle weakness and (even moderate) increases in perioperative blood glucose are associated with morbidity after major surgery. Although the optimal glucose concentration for improving clinical outcomes is unknown, most medical associations recommend treatment of random blood glucose > 10 mmol·L(-1). Neuraxial anesthesia blunts the neuroendocrine stress response and enhances the anabolic effects of nutrition. There is evidence to suggest that the avoidance of preoperative fasting prevents insulin resistance and accelerates recovery after major abdominal surgery.

CONCLUSIONS

Current anticatabolic therapeutic strategies include glycemic control and perioperative nutrition in combination with optimal pain control and the avoidance of preoperative starvation. All these elements are part of Enhanced Recovery After Surgery (ERAS) programs.

The effect of starvation on blood stream cancer cell metastasis to the liver in rat after laparotomy

BACKGROUND

Preoperative malnutrition worsens the prognosis of cancer patients. However, it is not certain how preoperative malnutrition affects postoperative hematogenous metastasis. We examined the influence of preoperative starvation on liver metastasis in rats using intra-vascular injection of AH109A hepatoma cells.

METHODS

Male donryu rats were divided into Fasting and Control groups. Rats received laparotomy and (125)I-iodo-deoxyuridine labeled AH109A hepatoma cells were inoculated via superior mesenteric vein. Radioactivity in the organs, macroscopic liver metastasis, white blood cell count, leukocyte count, NK cell activity, endogenous serum corticosterone and ACTH concentration and mRNA expression of cytokine in the liver and brain were evaluated at certain time points.

RESULTS

48hours preoperative starvation reduced body weight and induced a state of malnutrition. Accumulation of radioactivity in the liver was more than 4 times higher, and the number of liver metastases was 3.5 times higher in the Fasting than in the Control group. Preoperative starvation caused an almost 2 fold increase in plasma endogenous corticosterone levels and a 66% reduction in white blood cell and lymphocyte counts. Postoperative hypothalamus pituitary adrenal axis response was preserved. In addition, inflammatory cytokine expression in the liver was suppressed in the starved animals, suggesting that preoperative starvation led to a state of cellular immunosuppression, which would be an important factor for liver metastasis.

CONCLUSION

Preoperative malnutrition by 48 hours starvation reduced inflammatory cytokine response and cellular immunity, resulting in an increase in hematogenous liver metastasis.

Acute Liver Failure following Hepatic Resection: Incidence, Presentation, Prevention and Management in ICU

The incidence of liver failure following liver resection has been reported to be between 8–32%, depending on the number of segments resected, the health of the patient and the incidence of hepatic ischaemic/reperfusion injury. This article outlines the evidence surrounding classification, prevention and management of this condition.

Disease specific substrates in cancer cachexia - Reality and anticipation

In recent years, the concept of nutrition in patients with tumour diseases has been changing very significantly. The article discusses the pathogenesis of tumour cachexia and sarcopenia, which have been intensively studied, particularly in the last ten years. The possibilities and modern approaches in nutritional support in oncology are reviewed with a special emphasis on the group of elderly patients. Also, a detailed list of the most frequently used pharmaconutrients in oncology is presented. The recommendations for nutritional care of elderly oncological patients are given and discussed.

Perioperative nutrition support in cancer patients

Malnutrition and weight loss negatively affect outcomes in surgical cancer patients. Decades of research have sought to identify the most appropriate use of nutrition support in these patients. National and international guidelines help to direct clinicians' use of nutrition support in surgical patients, but a number of specific issues concerning the use of nutrition support continue to evolve. This review focuses on 5 key issues related to perioperative nutrition support in cancer patients: (1) Which perioperative cancer patients should receive nutrition support? (2) How can the nutrition status and requirements of these patients be optimally assessed? (3) What is the optimal route of administration (parenteral nutrition vs enteral nutrition) and composition of nutrition support in this setting? (4) When should feedings be initiated? (5) What is the role of glycemic control in these patients?

Body mass index (BMI) at diagnosis is associated with surgical wound complications in patients with localized osteosarcoma: a report from the Children's Oncology Group

BACKGROUND

Malnutrition is common at diagnosis and during treatment for sarcoma patients. Poor nutritional status is associated with increased risk of complications, particularly infections. We investigated the role of body mass index (BMI) on the incidence of surgical wound complications in patients with localized osteosarcoma treated on the Children's Oncology Group (COG) legacy trial, INT-0133.

PROCEDURE

Patients considered in this report had localized osteosarcoma, enrolled on COG trial INT-0133, remained on protocol therapy to have definitive surgery 6-16 weeks after study entry, and had adequate height, weight, and surgical complication data for analysis. By protocol design, definitive surgical resection was planned for 10 weeks after induction chemotherapy. Wound complications within 30 days after definitive surgery were considered post-operative. BMI was calculated at the start of neoadjuvant chemotherapy and expressed as age- and gender-adjusted percentile. The incidence of wound complications was evaluated by logistic regression or Fisher's exact test.

RESULTS

A total of 498 patients met criteria for analysis. Low BMI (≤10th percentile) was seen in 73 (14.7%), middle BMI (11th-94th percentile) in 382 (76.7%), and high BMI (≥95th percentile) in 43 (8.6%) patients. Wound infection or slough was seen in low BMI patients (OR = 2.0, P = 0.07) although the results did not reach statistical significance. Arterial thrombosis was more common in high BMI patients (OR = 9.4, P = 0.03).

CONCLUSIONS

Abnormal BMI at the start of treatment for localized osteosarcoma is associated with increased risk of post-operative wound complications such as arterial thrombosis. Future studies should evaluate whether maintenance of age-appropriate BMI reduces the risk of surgical complications.

Prediction, prevention and management of postresection liver failure

Background

Postresection liver failure (PLF) is the major cause of death following liver resection. However, there is no unified definition, the pathophysiology is understood poorly and there are few controlled trials to optimize its management. The aim of this review article is to present strategies to predict, prevent and manage PLF.

Methods

The Web of Science, MEDLINE, PubMed, Google Scholar and Cochrane Library databases were searched for studies using the terms ‘liver resection’, ‘partial hepatectomy’, ‘liver dysfunction’ and ‘liver failure’ for relevant studies from the 15 years preceding May 2011. Key papers published more than 15 years ago were included if more recent data were not available. Papers published in languages other than English were excluded.

Results

The incidence of PLF ranges from 0 to 13 per cent. The absence of a unified definition prevents direct comparison between studies. The major risk factors are the extent of resection and the presence of underlying parenchymal disease. Small-for-size syndrome, sepsis and ischaemia–reperfusion injury are key mechanisms in the pathophysiology of PLF. Jaundice is the most sensitive predictor of outcome. An evidence-based approach to the prevention and management of PLF is presented.

Conclusion

PLF is the major cause of morbidity and mortality after liver resection. There is a need for a unified definition and improved strategies to treat it.

Nutrition assessment as a predictor of clinical outcomes for infants with cardiac surgery: using the prognostic nutritional index

BACKGROUND

The aim of the present study was to determine whether nutrition assessment helps predict clinical outcomes (COs) in infants who have undergone cardiac surgery.

METHODS

Study subjects were infants, aged less than 18 months, who had undergone cardiac surgery between April 2007 and August 2008. The nutrition parameters assessed include Onodera's prognostic nutritional index (PNI), height for age, weight for height, and weight for age. COs included mortality rate during hospitalization, length of stay in intensive care unit (LOS-1), length of stay in the hospital after surgery (LOS-2), and duration of mechanical ventilation support. Method-1: the correlation between nutrition parameters and COs was examined by statistical analysis. Method-2: the cutoff point of nutrition parameters was determined using the minimum P value approach.

RESULTS

The following results were obtained: Results-1: PNI was the only nutrition parameter found to be correlated with LOS-1. Results-2: the cutoff point for PNI as a predictor of LOS-1 was 55.

CONCLUSIONS

It appeared that preoperative PNI was the most influential factor on LOS-1 for infants after they underwent cardiac surgery. The PNI cutoff point 55 in infants who underwent cardiac surgery seems to be the best predictor of CO.

Factors associated with changes in coagulation profiles after living donor hepatectomy

BACKGROUND

Hepatic resection may be associated with postoperative coagulopathy. However, there is limited information about the predictors affecting coagulopathy after donor hepatectomy. We evaluated the contributors of maximal changes in prothrombin time (PT), activated thromboplastin time (aPTT), and platelet count in the development of postoperative coagulopathy.

METHODS

We retrospectively analyzed 864 living donors, all of whom received general anesthesia using desflurane, isoflurane, or sevoflurane. A coagulation derangement was defined as one or more of the following events postoperatively: peak PT >1.5 international normalized ratio (INR; highest quartile of PT), peak aPTT >46 seconds (highest quartile of aPTT), or nadir platelet count <100 × 10(9)/L. Factors were evaluated by univariate and multivariate logistic regression analysis to identify predictors of coagulopathy.

RESULTS

Mean postoperative peak PT, peak aPTT, and nadir platelet count were 1.4 ± 0.2 INR, 43.8 ± 23.7 seconds, and 155.9 ± 37.3 × 10(9)/L, respectively, with 39.4% of donors being at the risk for coagulation derangement. Multivariate logistic regression analysis revealed that predictors of such derangement included anesthesia duration, remnant liver volume, and body mass index (BMI). However, coagulation derangement was not independently associated with age, gender, volatile anesthetics, central venous pressure, fatty change in the liver, estimated blood loss, or intraoperative hypotensive episodes.

CONCLUSION

We found that long anesthesia duration, low BMI, and small remnant liver volume were predictors of coagulation derangement. These results provide a better understanding of risk factors affecting changes in coagulation profiles after living donor hepatectomy.

Understanding weight loss in patients with colorectal cancer: a human response to illness

PURPOSE/OBJECTIVES

To provide a comprehensive overview of weight loss in patients with colorectal cancer (CRC) within the context of the Human Response to Illness (HRTI) model.

DATA SOURCES

Research from 1990-2008 and classic research from the 1980s were included. PubMed, CINAHL(R), and Google Scholar were searched for the terms cancer, CRC, weight loss, and cancer cachexia.

DATA SYNTHESIS

Progressive, unintentional weight loss is a common issue in patients with CRC that has a devastating effect on patients' self-image, quality of life, and survival. Physiologic abnormalities, responses to the tumor, and treatments contribute to weight loss in these patients. In addition, cancer cachexia is an end-stage wasting syndrome and a major cause of morbidity and mortality in this population.

CONCLUSIONS

The HRTI model provides an appropriate framework to gain a comprehensive understanding of the physiologic, pathophysiologic, behavioral, and experiential perspectives of weight loss and cancer cachexia in patients with CRC.

IMPLICATIONS FOR NURSING

By examining weight loss in patients with CRC within the context of the four perspectives of the HRTI model, oncology and gastroenterology nurses can gain insight into optimal, evidence-based assessment and management of this patient population. In addition, current gaps in knowledge can be identified and provide guidance for future nursing research.

Recommendations on current approach to gastric cancer

The management of gastric cancer has been updated by the Grupo Español de Tratamiento de Tumores Digestivos (TTD). A multidisciplinary approach is essential in these patients including a precise diagnosis and staging and correct nutritional evaluation. For resectable disease, surgical resection remains the treatment mainstay and both perioperatory chemotherapy and postoperatory chemo-radiotherapy are considered standard complementary treatments. In advanced disease chemotherapy should always be considered. There are different reference schemes (TCF, XC, ECF, EXC) and the therapeutic option has to be individualised. Recently a phase III trial has shown a significant improvement in overall survival when trastuzumab is added to cisplatin-capecitabine or cisplatin-5-fluorouracil in patients with HER2+ advanced gastric cancer. Currently, there are several ongoing clinical trials evaluating the role of other new drugs against cellular targets. It would be desirable to incorporate biomarker studies in these trials in order to identify the best treatment for each patient.

Review of American Society for Parenteral and Enteral Nutrition (ASPEN) Clinical Guidelines for Nutrition Support in Cancer Patients: nutrition screening and assessment

It is clear that cancer patients develop complex nutrition issues. Nutrition support may or may not be indicated in these patients depending on individual patient characteristics. This review article, the first in a series of articles to examine the A.S.P.E.N. Guidelines for the Use of Parenteral and Enteral Nutrition in Adult and Pediatric Patients Cancer Guidelines, evaluates the evidence related to the use of nutrition screening and nutrition assessment in cancer patients. This first article will provide background concerning nutrition issues in cancer patients as well as discuss the role of nutrition screening and nutrition assessment in the care of cancer patients. The goal of this review is to enrich the discussion contained in the Clinical Guidelines, cite the primary literature more completely, and suggest updates to the guideline statements in light of subsequent published studies. Future articles will explore the guidelines related to nutrition support in oncology patients receiving anticancer therapies.

Liver failure after partial hepatic resection: definition, pathophysiology, risk factors and treatment

Liver failure is a dreaded and often fatal complication that sometimes follows a partial hepatic resection. This article reviews the definition, incidence, pathogenesis, risk factors, risk assessment, prevention, clinical features and treatment of post-resectional liver failure (PLF). A systematic, computerized search was performed using key words related to 'partial hepatic resection' and 'liver failure' to review most relevant literature about PLF published in the last 20 years. The reported incidence of PLF ranges between 0.7 and 9.1%. An inadequate quantity or quality of residual liver mass are key events in its pathogenesis. Major risk factors are the presence of comorbid conditions, pre-existent liver disease and small remnant liver volume (RLV). It is essential to identify these risk factors during the pre-operative assessment that includes evaluation of liver volume, anatomy and function. Preventive measures should be applied whenever possible as curative treatment options for PLF are limited. These preventive measures intend to increase RLV and protect remnant liver function. Management principles focus on support of end-organ and liver function. Further research is needed to elucidate the exact pathogenesis of PLF and to develop and validate adequate treatment options.

The introducer technique is the optimal method for placing percutaneous endoscopic gastrostomy tubes in head and neck cancer patients

BACKGROUND

Percutaneous endoscopic gastrostomy (PEG) tubes are often placed in head and neck cancer patients to provide nutritional support, but studies have found the complication rates to be higher than other subsets of patients who undergo PEG placement. Complication rates as high as 50% have been reported, with the bulk of these complications being PEG site issues (i.e., cellulitis, abscess, fascitis, and tumor implantation). Because the pull technique has been the primary technique used, the theory is that the transoral tube passage is the source of the complications in these patients. Alternatively, the introducer technique uses a transabdominal approach to place the device, avoiding any tube contamination by upper aerodigestive organisms or tumor cells. At our institution, this technique has been used exclusively for head and neck cancer patients and this article reports our experience.

METHODS

One hundred forty-nine head and neck cancer patients who had a prophylactic PEG tube placed were reviewed from January 1, 1999 to December 31, 2003. The rates of placement success, morbidity, and complications were determined.

RESULTS

Successful placement was achieved in 148 (99%) patients without any PEG-related deaths. Overall, 17 complications (11%) occurred, with only one major complication (0.7%) identified. PEG site infections were uncommon with only five cases (3.4%) and all were mild cellulitis.

CONCLUSIONS

The introducer technique is the safest method for PEG tube placement in head and neck cancer patients. The overall rate of complications is low and PEG site infectious complications are rare. The introducer technique should be the method of choice for PEG tubes in head and neck cancer patients.

Cancer cachexia: it's time for more clinical trials

Cancer cachexia (CC) is a multifactorial paraneoplastic syndrome characterized by anorexia, body weight loss, loss of adipose tissue and skeletal muscle, accounting for at least 20% of deaths in neoplastic patients. CC significantly impairs quality of life and response to anti-neoplastic therapies, increasing morbidity and mortality of cancer patients. Muscle wasting is the most important phenotypic feature of CC and the principal cause of function impairment, fatigue and respiratory complications, mainly related to a hyperactivation of muscle proteolytic pathways. Most current therapeutic strategies to counteract CC have proven to be only partially effective. In the last decade, the correction of anorexia, the inhibition of catabolic processes and the stimulation of anabolic pathways in muscle have been attempted pharmacologically with encouraging results in animal models and through preliminary clinical trials. However, data in the clinical setting are still scanty and non definitive. It is time to start prospective, randomized, controlled trials to evaluate which drugs are effective in counteracting the loss of lean of muscle mass and in improving nutritional status and quality of life in patients affected by cancer-related cachexia.

Complications after extended (D2) and superextended (D3) lymphadenectomy for gastric cancer: analysis of potential risk factors

BACKGROUND

Very few studies from Western centers have compared D2 and D3 dissection in the surgical treatment of gastric cancer. The aim of the prospective observational study reported here was to analyze the postoperative outcome and potential risk factors for complications following D2 and D3 lymphadenectomy.

METHODS

A total of 330 consecutive patients, of which 251 submitted to D2 lymphadenectomy and 79 were treated by D3 lymphadenectomy, were enrolled in the study. Twenty potential risk factors for morbidity and mortality were studied by means of univariate and multivariate analysis.

RESULTS

Overall morbidity and mortality rates were 34% (111 patients) and 4% (14 patients), respectively. Abdominal abscess, anastomotic leakage, pleuropulmonary diseases and pancreatitis were the most commonly observed complications. No differences in morbidity, surgical morbidity, mortality rates and mean hospital stay between D2 and D3 lymphadenectomy were found. Multivariate analysis revealed that American Society of Anesthesiologists' (ASA) class II/III versus class I, perioperative blood transfusions, and low albumin serum levels were independent predictors of postoperative complications. Age, surgical radicality (R1/R2 vs. R0) and low albumin serum levels independently predicted mortality. Mortality rate was .5% in the 203 patients aged 75 years or younger who underwent curative surgery. Most of deaths were observed in patients older than 75 years with low albumin serum levels or treated by non-curative surgery.

CONCLUSIONS

D2 lymphadenectomy represents a feasible procedure associated to acceptable morbidity and mortality rates. In specialized centers, D3 lymphadenectomy may be performed without increasing the risk of postoperative complications and associated deaths in carefully selected patients. These techniques should be avoided in subgroups of patients with a high risk of postoperative mortality.