Preoperative immunonutrition in frail patients with colorectal cancer: an intervention to improve postoperative outcomes

Association of perioperative immunonutrition with anastomotic leak among patients undergoing elective colorectal surgery within a robust enhanced recovery after surgery program

BACKGROUND

Immunonutrition supplementation has been shown to reduce the risk of surgical infectious complications; however, its effect on decreasing anastomotic leak rates, in the context of an otherwise robust Enhanced Recovery After Surgery (ERAS) program, remains unclear. This study aims to assess the association between perioperative immunonutrition supplementation and anastomotic leak in an elective Enhanced Recovery After Surgery colorectal surgical population.

METHODS

We performed a retrospective single-institution cohort study consisting of adult patients enrolled in an Enhanced Recovery After Surgery pathway and undergoing elective colorectal surgery from 2018 to 2023. Immunonutrition supplementation was defined as a 10-day perioperative supply of commercially available nutritional shakes. Relevant demographic covariates, preoperative characteristics, and operative methods were identified and analyzed. Multivariable logistic regression was performed to determine the association of immunonutrition with anastomotic leak.

RESULTS

A total of 708 patients were included in the study, of which n = 400 (56.5%) received perioperative immunonutrition. Patients who received immunonutrition were more likely to be older (median age 57.9 vs 55.7), male (52.7% vs 44.8%), have a higher body mass index (27.7 vs 26.3), and less likely to be current smokers (9.8% vs 16.2%). On adjusted analysis, there was no association between immunonutrition use and anastomotic leak (odds ratio = 0.96, 95% confidence interval = 0.45, 2.08), 30-day readmission (odds ratio = 0.97, 95% confidence interval = 0.60, 1.57), or length of stay (β = .40, 95% confidence interval = -0.06, 0.86) CONCLUSION: We did not observe an association between perioperative immunonutrition supplementation and postoperative anastomotic leak, suggesting that the role of immunonutrition within a comprehensive Enhanced Recovery After Surgery program for elective colorectal surgery may warrant further evaluation.

Arginine on immune function and post-operative obstructions in colorectal cancer patients: a meta-analysis

BACKGROUND

The aim of this study is to investigate the impact of arginine on immune function and postoperative complications in colorectal cancer (CRC) patients.

METHODS

We conducted a comprehensive search to identify eligible RCTs in various databases, such as PubMed, Cochrane Library, EMBASE, Web of Science, MEDLINE, China National Knowledge Infrastructure (CNKI), Wanfang, VIP Medicine Information System (VIP), and Chinese Biomedical Database (CBM). This study aimed to examine IgA, IgG, and IgM levels as well as CD4+ and CD8+ counts as well as the CD4+/CD8+ ratio. Anastomotic leaking, length of stay (LOS), and surgical site infection (SSI) were included as secondary outcomes. Stata (StataCorp, version 14.0) was utilized for data analysis. To ensure the results were reliable, we used meta-regression, sensitivity analysis, and publication bias analysis.

RESULTS

A total of 24 publications (including 1883 patients) out of 681 that were retrieved fulfilled the inclusion criteria. The arginine group showed notable improvements in humoral immunity, with gains in IgA (SMD=0.45, 95% CI: 0.30-0.60), IgG (SMD=0.80, 95% CI: 0.64-0.96), and IgM (SMD=0.66, 95% CI: 0.39-0.93). With regards to cellular immunity, the arginine group exhibited a substantial increase in the CD4+ T cell count (SMD = 1.03, 95% CI: 0.67-1.38) compared to the control group. However, the CD4+/CD8+ ratio decreased significantly (SMD=1.37, 95% CI: 0.88-1.86) in the same arginine group, indicating a change in the balance between these two cell types. Additionally, the CD8+ T cell count showed a notable decrease (SMD=-0.70, 95% CI: -1.09 to -0.32) in the arginine group when compared to the control group. Anastomotic leakage was also considerably lower in the arginine group (SMD=-0.05, 95% CI: -0.08 to -0.02), the rate of SSIs was lower (RR = -0.02, 95% CI: -0.05-0), and the length of time patients spent in the hospital was shorter (SMD=-0.15, 95% CI: -0.38 to -0.08).

CONCLUSIONS

After radiation treatment for CRC, arginine improves immune function and decreases the risk of infection problems.

TRIAL REGISTRATION

Registration with PROSPERO for this meta-analysis is number CRD42024520509.

EAES/SAGES evidence-based recommendations and expert consensus on optimization of perioperative care in older adults

BACKGROUND

As the population ages, more older adults are presenting for surgery. Age-related declines in physiological reserve and functional capacity can result in frailty and poor outcomes after surgery. Hence, optimizing perioperative care in older patients is imperative. Enhanced Recovery After Surgery (ERAS) pathways and Minimally Invasive Surgery (MIS) may influence surgical outcomes, but current use and impact on older adults patients is unknown. The aim of this study was to provide evidence-based recommendations on perioperative care of older adults undergoing major abdominal surgery.

METHODS

Expert consensus determined working definitions for key terms and metrics related to perioperative care. A systematic literature review and meta-analysis was performed using the PubMed, Embase, Cochrane Library, and Clinicaltrials.gov databases for 24 pre-defined key questions in the topic areas of prehabilitation, MIS, and ERAS in major abdominal surgery (colorectal, upper gastrointestinal (UGI), Hernia, and hepatopancreatic biliary (HPB)) to generate evidence-based recommendations following the GRADE methodology.

RESULT

Older adults were defined as 65 years and older. Over 20,000 articles were initially retrieved from search parameters. Evidence synthesis was performed across the three topic areas from 172 studies, with meta-analyses conducted for MIS and ERAS topics. The use of MIS and ERAS was recommended for older adult patients particularly when undergoing colorectal surgery. Expert opinion recommended prehabilitation, cessation of smoking and alcohol, and correction of anemia in all colorectal, UGI, Hernia, and HPB procedures in older adults. All recommendations were conditional, with low to very low certainty of evidence, with the exception of ERAS program in colorectal surgery.

CONCLUSIONS

MIS and ERAS are recommended in older adults undergoing major abdominal surgery, with evidence supporting use in colorectal surgery. Though expert opinion supported prehabilitation, there is insufficient evidence supporting use. This work has identified evidence gaps for further studies to optimize older adults undergoing major abdominal surgery.

Pre-Operative Immunonutrition Enhances Postoperative Outcomes and Elevates Tumor-Infiltrating Lymphocyte Counts in Colorectal Cancer Patients: A Meta-Analysis of Randomized Controlled Trials

OBJECTIVE

This study (CRD42023464989) aimed to explore the effects of pre-operation immunonutrition on safety and immune related factors in colorectal cancer patients undergoing surgery.

METHODS

We systematically searched PubMed, Embase, and Wanfang databases to collect all clinical randomized controlled trials of the application of pre-operation immunonutrition for patients with colorectal cancer, published until July 2023. The primary outcomes were safety and immune related factors.

RESULTS

A total of 16 studies were finally included. Preoperative immunonutrition could reduce the postoperative infection rate (risk ratio (RR) = 0.56, 95% confidence interval (CI): 0.36, 0.88; p = .01), and wound infection rate (RR = 0.44, 95% CI: 0.27, 0.70; p < .001) in patients with colorectal cancer. For length of stay (mean difference (MD) = -1.10, 95% CI: -2.70, 0.49; p = .17), it was similar between groups. Meanwhile, patients in the pre-operation immune nutrition group also had significantly increased infiltrative lymphocytes CD16+ (MD = 0.04, 95% CI: 0.02, 0.06; p < .001), and CD56+ (MD = 0.05, 95% CI: 0.03, 0.06; p < .001) cells in the tumor tissues, compared to the control group.

CONCLUSION

Immunonutrition intervention has the potential to reduce postoperative infectious complications and improve tumor infiltrative lymphocytes in patients with colorectal cancer undergoing surgery.

The Association Between Intraoperative Compromised Intestinal Integrity and Postoperative Complications in Cancer Patients

BACKGROUND

Because of perioperative splanchnic hypoperfusion, the gut wall becomes more permeable for intraluminal microbes to enter the splanchnic circulation, possibly contributing to development of complications. Hypoperfusion-related injured enterocytes release intestinal fatty acid binding protein (I-FABP) into plasma, which is used as proxy of intestinal integrity. This study investigates the occurrence of intestinal integrity loss during oncologic surgery, measured by I-FABP change. Secondary the relationship between compromised intestinal integrity, and related variables and complications were studied.

METHODS

Patients undergoing oncologic surgery from prospective cohort studies were included. Urine I-FABP samples were collected preoperatively (T0) and at wound closure (T1), and in a subgroup on Day 1 (D1) and Day 2 (D2) postoperatively. I-FABP dynamics were investigated and logistic regression analyses were performed to study the association between I-FABP levels and patient-related, surgical variables and complications.

RESULTS

A total of 297 patients were included with median age of 70 years. Median I-FABP value increased from 80.0 pg/mL at T0 (interquartile range [IQR] 38.0-142.0) to 115 pg/mL at T1 (IQR 48.0-198.0) (p < 0.05). Age (odds ratio [OR] 1.05, 95% confidence interval [CI] 1.02-1.08) and anesthesia time (OR 1.13, 95% CI 1.02-1.25) were related to stronger I-FABP increase. When comparing I-FABP change in patients experiencing any complications versus no complications, relative I-FABP change at T1 was 145% of T0 (IQR 86-260) versus 113% (IQR 44-184) respectively (p < 0.05).

CONCLUSIONS

A significant change in I-FABP levels was seen perioperatively indicating compromised intestinal integrity. Age and anesthesia time were related to higher I-FABP increase. In patients experiencing postoperative complications, a higher I-FABP increase was found.

Effect of prehabilitation on postoperative outcomes in the frail older people: A systematic review and meta-analysis

OBJECTIVE

The study investigates the impact of preoperative rehabilitation on the surgical prognosis of frail older patients.

METHOD

The effect sizes of all studies retrieved and included by the nine databases were analyzed and expressed as RR and WMD.

RESULTS

8 studies with 902 participants met the criteria for inclusion. A significant reduction in total complications (RR = 0.84, 95 % CI = 0.73 to 0.97, P = 0.021) and the 6MWT after surgery (WMD = 74.76, 95 % CI = 44.75 to 104.77, P = 0.000) was observed in the prehabilitation group. But it had no differences in mortality(RR = 1.89, 95 % CI = 0.75 to 4.72, P = 0.176), readmission rates(RR = 1.04, 95 % CI = 0.56 to 1.91, P = 0.906) and LOS(WMD = -0.24, 95 % CI = -1.00 to 0.52, P = 0.540).

CONCLUSIONS

Prehabilitation had positive effect on postoperative complications and functional recovery in frail older patients.

The influence of serum cholinesterase levels and sarcopenia on postoperative infectious complications in colorectal cancer surgery

PURPOSE

Cholinesterase is a nutritional marker associated with sarcopenia. The present study evaluated the relationship between cholinesterase and postoperative infectious complications in patients undergoing colorectal resection for colorectal cancer.

METHODS

The study involved 231 patients who had undergone colorectal resection for colorectal cancer. We retrospectively investigated the relationship between preoperative serum cholinesterase levels and postoperative infectious complications. Univariate and multivariate analyses were performed to identify independent risk factors for postoperative infectious complications. We then performed stratified analyses to assess the interaction between cholinesterase and clinical variables to predict postoperative infectious complications.

RESULTS

In the multivariate analysis, the body mass index (P = 0.010), serum cholinesterase levels (P = 0.005), sarcopenia (P = 0.003) and blood loss (P < 0.001) were independent risk factors for postoperative infectious complications. In stratified analyses, the association between serum cholinesterase levels and postoperative infectious complications differed by the sarcopenia status (Pinteraction = 0.006).

CONCLUSION

Preoperative serum cholinesterase levels may be useful for predicting postoperative infectious complications in colorectal cancer surgery. The association differs by the sarcopenia status, suggesting a potential interaction between nutritional markers and sarcopenia.

Should Laparoscopic Complete Mesocolic Excision Be Offered to Elderly Patients to Treat Right-Sided Colon Cancer?

BACKGROUND

Despite its potential oncologic benefit, complete mesocolic excision (CME) has rarely been offered to elderly patients. The present study evaluated the effect of age on postoperative outcomes among patients undergoing laparoscopic right colectomies with CME for right-sided colon cancer (RCC).

METHODS

Data of patients undergoing laparoscopic right colectomies with CME for RCC between 2015 and 2018 were retrospectively analyzed. Selected patients were divided into two groups: the under-80 group and the over-80 group. Surgical, pathological, and oncological outcomes among the groups were compared.

RESULTS

A total of 130 patients were selected (95 in the under-80 group and 35 in the over-80 group). No difference was found between the groups in terms of postoperative outcomes, except for median length of stay and adjuvant chemotherapy received, which were in favor of the under-80 group (5 vs. 8 days, p < 0.001 and 26.3% vs. 2.9%, p = 0.003, respectively). No difference between the groups was found regarding overall survival and disease free survival. Using multivariate analysis, only the ASA score > 2 (p = 0.01) was an independent predictor of overall complications.

CONCLUSIONS

laparoscopic right colectomy with CME for RCC was safely performed in elderly patients ensuring similar oncological outcomes compared to younger patients.

Surgical prehabilitation in older and frail individuals: a scoping review

Background:

Older individuals who are scheduled for elective procedures often have co-morbidities at baseline and may be classified as frail. Both older age and frailty are associated with poor fitness and preoperative deconditioning, which can be predictors of postoperative complications. Prehabilitation aims to improve preoperative health in order to reduce complications and expedite postoperative recovery. To date, the effect of prehabilitation on improving outcomes in older and frail individuals is unclear, and the evidence in support of multi-modal treatments is evolving.

Methods:

In this scoping review, searches of PubMed and Cochrane Library between August 2012 and August 2022 were performed to identify studies investigating the efficacy of prehabilitation prior to surgical procedures.

Results:

A total of 36 articles were included in the review. Most of these examined the efficacy of unimodal (n=21) prehabilitation interventions, most commonly exercise therapy. Multimodal prehabilitation programs (n=15) included a variety of intervention components (e.g., exercise training, nutrition, psychological intervention or geriatric consultation). The most commonly studied populations were patients with gastrointestinal cancer (mostly colorectal cancer). Exercise therapy and multimodal interventions are likely to be of greatest impact on postoperative functional decline in patients awaiting total knee or hip arthroplasty, and cancer-related resection surgery (e.g., due to colorectal, gastric or lung cancer) in older and frail patients.

Conclusions:

Presurgical prehabilitation showed the potential to diminish postoperative outcomes in older and frail patients prior to surgery. However, adequately powered, randomized controlled, assessor blinded intervention trials demonstrating overall benefit of prehabilitation are needed.

Aims

This scoping review aims to summarize the current literature on the efficacy of prehabilitation in older and frail individuals who are undergoing surgical procedures in order to support clinical protocols and inform future research.

Effect of Glutamine on Short-term Surgical Outcomes in Rectal Cancer Patients Receiving Neoadjuvant Therapy: A Propensity Score Matching Study

The effect of glutamine on postoperative complications and postoperative recovery in rectal cancer (RC) patients receiving neoadjuvant therapy (NT) is unclear. This study aimed to investigate the effects of intravenous glutamine supplementation on short-term postoperative outcomes in these patients. This retrospective study included patients with RC who received NT and underwent radical surgery between January 2013 and July 2022 and were either administered glutamine (glutamine group) or not administered glutamine (non-glutamine group). Propensity score matching method was used to analyze and compare postoperative complications and other outcome indicators. A total of 208 patients were reviewed, and 53 were included in each group post matching. While no significant difference in the time to first solid food intake between the two groups was observed, the glutamine group had a significantly reduced incidence of postoperative complications, shorter length of hospital stay, and shorter time to first defecation, first exhaust, and first fluid diet intake than those of the control group. Moreover, glutamine alleviated the reduction in albumin and prealbumin levels. Perioperative parenteral glutamine supplementation effectively reduces the incidence of postoperative complications, promotes postoperative recovery, and improves albumin levels in patients undergoing RC surgery and receiving NT.

Effects of prehabilitation on postoperative outcomes in frail cancer patients undergoing elective surgery: a systematic review and meta-analysis

PURPOSE

This systematic review and meta-analys is aimed to explore the effects of prehabilitation on postoperative outcomes in frail cancer patients.

METHODS

A comprehensive literature search was conducted using PubMed, Cochrane Library, Embase, Web of Science, CINAHL Complete, and other databases from database inception to 15 March 2022. Studies were included if they consisted of a prehabilitation intervention in frail cancer patients undergoing elective surgery.

RESULTS

A total of 9 studies encompassing 1313 patients were included in the review. Through meta-analysis, prehabilitation has a positive impact on total complications (RR = 0.83, 95% CI = 0.73 to 0.94, P = 0.004), severe complications (RR = 0.62, 95% CI = 0.43 to 0.90, P = 0.01), and the average length of hospital stay (MD =  - 1.36, 95% CI =  - 2.38 to - 0.35, P = 0.008). But it had no differences in 30-day and 3-month mortality and 30-day and 3-month readmission rates. Through qualitative synthesis, two studies found that prehabilitation had a favorable tendency to promote functional recovery compared with the control group.

CONCLUSION

Prehabilitation had a positive effect on postoperative complications and the average length of hospital stay in frail cancer patients. A personalized and supervised multimodal prehabilitation program with exercise at its core may be more beneficial for them. More studies with extensive follow-up are needed to confirm and update the findings of these results.

Significance of osteopenia in elderly patients undergoing emergency gastrointestinal surgery

Aim

Frailty assessment in elderly patients is crucial to predict the postoperative course, considering that frailty is highly associated with postoperative complications and mortality. The aim of this study was to evaluate the value of osteopenia as a risk factor for severe postoperative complications in elderly patients who underwent emergency gastrointestinal surgery.

Methods

This study comprised 103 elderly patients who underwent emergency gastrointestinal surgery. Osteopenia was diagnosed by measuring bone mineral density, which was calculated as the average pixel density in the midvertebral core at the 11th thoracic vertebra on the preoperative plain computed tomography image. We retrospectively investigated the relationship between preoperative osteopenia and severe postoperative complications (Clavien-Dindo classification ≥III). Univariate and multivariate analyses were performed to evaluate the risk factors for severe postoperative complications.

Results

Twenty-three patients (22.3%) developed severe postoperative complications. The optimal cutoff value of bone mineral density for severe postoperative complications was 119.5 Hounsfield unit (HU) and 39 patients (37.9%) were diagnosed with osteopenia. The univariate analysis revealed that the American Society of Anesthesiologists Physical Status of ≥3 (P = .0084), hemoglobin levels (P = .0026), albumin levels (P < .001), sarcopenia (P = .015), and osteopenia (P < .001) were significantly associated with severe postoperative complications. The multivariate analysis showed that osteopenia (P = .014) was an independent risk factor for severe postoperative complications.

Conclusion

Osteopenia may be a risk factor for severe postoperative complications in elderly patients after emergency gastrointestinal surgery.

Prehabilitation – current role in surgery

Introduction Prehabilitation concerns preoperative activities aimed in proper preparation to undergo a surgery and improve postoperative recovery. It includes the interdisciplinary approach by presurgical improvement of physical fitness and nourishment status, mental training and quitting addictions. The aim of the study was to investigate the recent publications in the field of prehabilitation. Methods We performed a systematic review in the PubMed database using the formula ‘preopreative OR before surgery, postoperative OR after surgery, prehabilitation’. The inclusion criteria were studies with a minimum population of 50 patients, including preoperative interventions, defined with a term prehabilitation, and their impact on a postoperative course of the patient. Three hundred seventy records were revealed and 13 studies were finally included in the analysis. Results According to qualified studies, prehabilitation improves significantly postoperative complications rate, length of hospital stay, postoperative physical activity, treatment costs, perioperative transfusions rate, antibiotic administration, and following the postoperative recommendations by patients. On the other hand, there is a lack of statistically significant impact of prehabilitation on quality of life, psychological condition, readmissions, and reoperations. Discussion Prehabilitation promotes development of multimodal care putting the patient’s well-being in the centre. Numerous studies indicate positive results of prehabilitation programs. The final results depend on the protocol of prehabilitation, selected group of patients and standard of care of the center. Conclusion Prehabilitation is necessary for providing the highest quality of care for a surgical patient. Interdisciplinary approach benefit a patient during the operation as well as in the postoperative period. Every surgical clinic should be aware of the idea of prehabilitation and possibly create their own programs.

Application of NRS2002 in Preoperative Nutritional Screening for Patients with Liver Cancer

OBJECTIVE

To explore the application of NRS2002 in preoperative nutritional screening of patients with liver cancer (LC).

METHODS

60 LC patients treated in the First Affiliated Hospital of Gannan Medical University (January 2018-May 2021) were chosen as the research objects, and split into group J without nutritional risk and group Q with nutritional risk according to the results of NRS2002 to compare the preoperative situation, surgery-related indexes, hematological indexes, postoperative recovery, and incidence of complications between the two groups.

RESULTS

Group J (n = 28) and group Q (n = 32) showed no obvious difference in preoperative situation, and patients' liver function indexes were within the normal range. The duration of surgery in group J was notably shorter compared with group Q (P < 0.05). Alanine aminotransferase (ALT), aspartate aminotransferase (AST), direct bilirubin (DBIL), and albumin in group J were notably different from those of group Q (P < 0.001) at 1 day after surgery. ALT and AST in group J were notably different from those of group Q at 3 days after surgery (P < 0.001). No obvious differences were observed in the hematological indexes between the two groups at 5 days after surgery (P > 0.05). The total amount of albumin infusion, postoperative hospitalization time, and hospitalization cost in group J were notably lower compared with group Q (P < 0.001). The incidence of complications in group J was notably lower compared with group Q (P < 0.05).

CONCLUSION

Postoperative recovery of LC patients is closely related to their preoperative nutritional status, and those with poor nutritional status have a high incidence of postoperative complications and long recovery time. NRS2002 can effectively screen the nutritional status of patients and provide reference for prognosis evaluation.

Impact of a Geriatric Intervention to Improve Screening and Management of Undernutrition in Older Patients Undergoing Surgery for Colorectal Cancer: Results of the ANC Stepped-Wedge Trial

Almost two in three patients who are aged 75 years and older and scheduled for surgery for colorectal cancer (CRC) are undernourished. Despite evidence that perioperative nutritional management can improve patients outcomes, international guidelines are still insufficiently applied in current practice. In this stepped-wedge cluster-randomized study of five surgical hospitals, we included 147 patients aged 70 years or older with scheduled abdominal surgery for CRC between October 2013 and December 2016. In the intervention condition, an outreach team comprising a geriatrician and a dietician visited patients and staff in surgical wards to assist with the correct application of guidelines. Evaluation, diagnosis, and prescription (according to nutritional status) were considered appropriate and strictly consistent with guidelines in 39.2% of patients in the intervention group compared to only 1.4% in the control group (p = 0.0002). Prescription of oral nutritional supplements during the perioperative period was significantly improved (41.9% vs. 4.1%; p < 0.0001). However, there were no benefits of the intervention on surgical complications or adverse events. A possible benefit of hospital stay reduction will need to be confirmed in further studies. This study highlights the importance of the implementation of quality improvement interventions into current practice for the perioperative nutritional management of older patients with CRC.

Guide to Enhanced Recovery for Cancer Patients Undergoing Surgery: ERAS for Patients Undergoing Cytoreductive Surgery with or Without HIPEC

ERAS protocols may reduce length of stay and return to full functional recovery after cytoreductive surgery and HIPEC. Prehabilitation programs and post-operative goal directed pathways, along with other essential components of ERAS are discussed with supporting evidence.

Immunonutrition in elective colorectal surgery and early inflammatory response

BACKGROUND

Immunonutrition has gained increasing interest over years, enough to be recommended in several international guidelines and to be included in the ERAS protocol for colorectal surgery. Although clinical advantages have been proved for malnourished cancer-affected patients, its role is more controversial in other settings. We have evaluated the impact of immunonutrition in major colorectal elective surgery for benign and malignant diseases, regardless of the preoperative nutritional status.

METHODS

We conducted a single center retrospective analysis of a database of patients who underwent elective major colon-rectal surgery for benign and malignant diseases between January 2018 and February 2020. In January 2019 we started a protocol to define which patients should receive preoperative immunonutrition, regardless of their nutritional status. We compared early postoperative outcomes and laboratory data of this group (IMN) to those of patients who met all the characteristics to be included in the protocol, but who did not receive immunonutrition (CTRL).

RESULTS

The IMN group showed significantly lower total leukocytes and neutrophils values and a lower pathological leukocytosis rate on 1st postoperative day compared to the CTRL group (p=0.004). Although differences in early postoperative clinical outcomes were not significant, patients belonging to the IMN group needed less postoperative antibiotic treatment (p = 0.047).

CONCLUSIONS

Immunonutrition could affect granulocytopoiesis and neutrophils recruitment in damaged tissues. This could lead to better and faster tissue healing and, consequently, to a reduction in postoperative complications even in normo-nourished patients. The lower need for antibiotic treatment could reflect a reduced susceptibility to postoperative infections.

Preoperative serum cholinesterase levels as a risk factor of postoperative complications for the elderly undergoing emergency surgery

PURPOSES

An accurate assessment of preoperative malnutrition in the elderly is critically important to predicting postoperative complications. The aim of this study is to evaluate the predictive value of the preoperative serum cholinesterase levels as a risk factor for postoperative complications in the elderly who have undergone emergency surgery.

METHODS

The study comprised 60 elderly patients who had undergone emergency major gastroenterological surgery. We retrospectively investigated the relationship between the preoperative serum cholinesterase levels and postoperative complications (Clavien-Dindo classification ≥ II). Univariate and multivariate analyses were performed to evaluate the risk factors for postoperative complications.

RESULTS

Thirty-three patients (55%) developed postoperative complications. According to the univariate analysis, hemoglobin (P = 0.018), albumin (P = 0.0036), cholinesterase (P < 0.001), C-reactive protein (P = 0.043), prognostic nutritional index (P = 0.0050), the Physiologic and Operative Severity Score for the enUmeration of Mortality and Morbidity (P < 0.001) and operation time (P = 0.042) were identified to be risk factors for postoperative complications. According to the multivariate analysis, low preoperative serum cholinesterase levels were found to be an independent risk factor for postoperative complications (P = 0.029). In the extremely elderly (80-95 years), the cholinesterase-low group had a higher complication rate compared to the cholinesterase-high group (77.8 vs 43.8%, P = 0.028).

CONCLUSION

The preoperative serum cholinesterase levels may be a risk factor for postoperative complications in elderly patients after emergency surgery, thus suggesting the significance of cholinesterase in evaluating the nutritional status.

The Role of Immunonutrition in Patients Undergoing Pancreaticoduodenectomy

Pancreaticoduodenectomy (PD) is one of the most difficult and complex surgical procedures in abdominal surgery. Malnutrition and immune dysfunction in patients with pancreatic cancer (PC) may lead to a higher risk of postoperative infectious complications. Although immunonutrition (IN) is recommended for enhanced recovery after surgery (ERAS) in patients undergoing PD for 5-7 days perioperatively, its role in patients undergoing pancreatectomy is still unclear and controversial. It is known that the proper surgical technique is very important in order to reduce a risk of postoperative complications, such as a pancreatic fistula, and to improve disease-free survival in patients following PD. However, it has been proven that IN decreases the risk of infectious complications, and shortens hospital stays in patients undergoing PD. This is a result of the impact on altered inflammatory responses in patients with cancer. Both enteral and parenteral, as well as preoperative and postoperative IN, using various nutrients, such as glutamine, arginine, omega-3 fatty acids and nucleotides, is administered. The most frequently used preoperative oral supplementation is recommended. The aim of this paper is to present the indications and benefits of IN in patients undergoing PD.