Analysis of the variety in surgeons' decision strategies for the management of left colonic emergencies

Management of obstructive colon cancer: Current status, obstacles, and future directions

Approximately 10%–18% of patients with colon cancer present with obstruction at the initial diagnosis. Despite active screening efforts, the incidence of obstructive colon cancer remains stable. Traditionally, emergency surgery has been indicated to treat patients with obstructive colon cancer. However, compared to patients undergoing elective surgery, the morbidity and mortality rates of patients requiring emergency surgery for obstructive colon cancer are high. With the advancement of colonoscopic techniques and equipment, a self-expandable metal stent (SEMS) was introduced to relieve obstructive symptoms, allowing the patient’s general condition to be restored and for them undergo elective surgery. As the use of SEMS placement is growing, controversies about its application in potentially curable diseases have been raised. In this review, the short- and long-term outcomes of different treatment strategies, particularly emergency surgery vs SEMS placement followed by elective surgery in resectable, locally advanced obstructive colon cancer, are described based on the location of the obstructive cancer lesion. Controversies regarding each treatment strategy are discussed. To overcome current obstacles, a potential diagnostic method using circulating tumor DNA and further research directions incorporating neoadjuvant chemotherapy are introduced.

Understanding surgical decision-making in older adults with differentiated thyroid cancer: A discrete choice experiment

BACKGROUND

Prior studies demonstrated that older adults tend to undergo less surgery for thyroid cancer. Our objective was to use a discrete choice experiment to identify factors influencing surgical decision-making for older adults with thyroid cancer.

METHODS

Active and candidate members of the American Association of Endocrine Surgeons were invited to participate in a web-based survey. Multinomial logistic regression was utilized to assess patient and surgeon factors associated with treatment choices.

RESULTS

Complete survey response rate was 25.7%. Most respondents were high-volume surgeons (88.5%) at academic centers (76.9%). Multinomial logistic regression demonstrated that patient age was the strongest predictor of management. Increasing age and comorbidities were associated with the choice for active surveillance (P = .000), not performing a lymphadenectomy in patients with nodal metastases (relative-risk ratio: 2.5, 95% CI: 1.4-4.2, P = .002 and relative-risk ratio: 1.6, 95% CI: 1.2-2.1, P = .004, respectively), and recommending hemithyroidectomy versus total thyroidectomy for a cancer >4 cm (relative-risk ratio: 4.4, 95% CI: 2.5-7.9, P = .000 and relative-risk ratio: 3.4, 95% CI: 2.3-5.1, P = .000, respectively). Surgeons with ≥10 years of experience (relative-risk ratio: 3.3, 95% CI: 1.1-10.3, P = .039) favored total thyroidectomy for a cancer <4 cm, and nonfellowship trained surgeons (relative-risk ratio: 7.3, 95% CI: 1.3-42.2, P = .027) opted for thyroidectomy without lymphadenectomy for lateral neck nodal metastases.

CONCLUSION

This study highlights the variation in surgical management of older adults with thyroid cancer and demonstrates the influence of patient age, comorbidities, surgeon experience, and fellowship training on management of this population.

Assessing resectability of colorectal liver metastases: How do different subspecialties interpret the same data?

BACKGROUND

Multimodal treatment of colorectal liver metastases (CRLMs) relies on precise upfront assessment of resectability. Variability in the definition of resectable disease and the importance of early consultation by a liver surgeon have been reported. In this pilot study we investigated the initial resectability assessment and patterns of referral of patients with CRLMs.

METHODS

Surgeons and medical oncologists involved in the management of colorectal cancer at 2 academic institutions and affiliated community hospitals were surveyed. Opinions were sought regarding resectability of CRLMs and the type of initial specialty referral (hepatobiliary surgery, medical oncology, palliative care or other) in 6 clinical cases derived from actual cases of successfully performed 1- or 2-stage resection/ablation of hepatic disease. Case scenarios were selected to illustrate critical aspects of assessment of resectability, best therapeutic approaches and specialty referral. Standard statistical analyses were performed.

RESULTS

Of the 75 surgeons contacted, 64 responded (response rate 85%; 372 resectability assessments completed). Hepatic metastases were more often considered resectable by hepatobiliary surgeons than all other respondents (92% v. 57%, p < 0.001). Upfront systemic therapy was most commonly prioritized by surgical oncologists (p = 0.01). Hepatobiliary referral was still considered in 73% of "unresectable" assessments by colorectal surgeons, 59% of those by general surgeons, 57% of those by medical oncologists and 33% of those by surgical oncologists (p = 0.1).

CONCLUSION

Assessment of resectability varied significantly between specialties, and resectability was often underestimated by nonhepatobiliary surgeons. Hepatobiliary referral was not considered in a substantial proportion of cases erroneously deemed unresectable. These disparities result largely from an imprecise understanding of modern surgical indications for resection of CRLMs.

Identifying complexity in infectious diseases inpatient settings: An observation study

BACKGROUND

Understanding complexity in healthcare has the potential to reduce decision and treatment uncertainty. Therefore, identifying both patient and task complexity may offer better task allocation and design recommendation for next-generation health information technology system design.

OBJECTIVE

To identify specific complexity-contributing factors in the infectious disease domain and the relationship with the complexity perceived by clinicians.

METHOD

We observed and audio recorded clinical rounds of three infectious disease teams. Thirty cases were observed for a period of four consecutive days. Transcripts were coded based on clinical complexity-contributing factors from the clinical complexity model. Ratings of complexity on day 1 for each case were collected. We then used statistical methods to identify complexity-contributing factors in relationship to perceived complexity of clinicians.

RESULTS

A factor analysis (principal component extraction with varimax rotation) of specific items revealed three factors (eigenvalues>2.0) explaining 47% of total variance, namely task interaction and goals (10 items, 26%, Cronbach's Alpha=0.87), urgency and acuity (6 items, 11%, Cronbach's Alpha=0.67), and psychosocial behavior (4 items, 10%, Cronbach's alpha=0.55). A linear regression analysis showed no statistically significant association between complexity perceived by the physicians and objective complexity, which was measured from coded transcripts by three clinicians (Multiple R-squared=0.13, p=0.61). There were no physician effects on the rating of perceived complexity.

CONCLUSION

Task complexity contributes significantly to overall complexity in the infectious diseases domain. The different complexity-contributing factors found in this study can guide health information technology system designers and researchers for intuitive design. Thus, decision support tools can help reduce the specific complexity-contributing factors. Future studies aimed at understanding clinical domain-specific complexity-contributing factors can ultimately improve task allocation and design for intuitive clinical reasoning.

Clinical Complexity in Medicine: A Measurement Model of Task and Patient Complexity

BACKGROUND

Complexity in medicine needs to be reduced to simple components in a way that is comprehensible to researchers and clinicians. Few studies in the current literature propose a measurement model that addresses both task and patient complexity in medicine.

OBJECTIVE

The objective of this paper is to develop an integrated approach to understand and measure clinical complexity by incorporating both task and patient complexity components focusing on the infectious disease domain. The measurement model was adapted and modified for the healthcare domain.

METHODS

Three clinical infectious disease teams were observed, audio-recorded and transcribed. Each team included an infectious diseases expert, one infectious diseases fellow, one physician assistant and one pharmacy resident fellow. The transcripts were parsed and the authors independently coded complexity attributes. This baseline measurement model of clinical complexity was modified in an initial set of coding processes and further validated in a consensus-based iterative process that included several meetings and email discussions by three clinical experts from diverse backgrounds from the Department of Biomedical Informatics at the University of Utah. Inter-rater reliability was calculated using Cohen's kappa.

RESULTS

The proposed clinical complexity model consists of two separate components. The first is a clinical task complexity model with 13 clinical complexity-contributing factors and 7 dimensions. The second is the patient complexity model with 11 complexity-contributing factors and 5 dimensions.

CONCLUSION

The measurement model for complexity encompassing both task and patient complexity will be a valuable resource for future researchers and industry to measure and understand complexity in healthcare.

Treating patients with colon cancer liver metastasis: a nationwide analysis of therapeutic decision making

BACKGROUND

Criteria for resectability of colon cancer liver metastases (CLM) are evolving, yet little is known about how physicians choose a therapeutic strategy for potentially resectable CLM.

METHODS

Physicians completed a national Web-based survey that consisted of varied CLM conjoint tasks. Respondents chose among three treatment strategies: immediate liver resection (LR), preoperative chemotherapy followed by surgery (C → LR), or palliative chemotherapy (PC). Data were analyzed by multinomial logistic regression, yielding odds ratios (OR).

RESULTS

Of 219 respondents, 79 % practiced at academic centers and 63 % were in practice ≥10 years. Median number of cases evaluated was four per month. Surgical training varied: 51 % surgical oncology, 44 % hepato-pancreato-biliary/transplantation, 5 % no fellowship. Although each factor affected the choice of CLM therapy, the relative effect differed. Hilar lymph node disease predicted a strong aversion to LR with surgeons more likely to choose C → LR (OR 8.92) or PC (OR 49.9). Solitary lung metastasis also deterred choice of LR, with respondents favoring C → LR (OR 4.43) or PC (OR 6.97). After controlling for clinical factors, surgeons with more years in practice were more likely to choose PC over C → LR (OR 1.94) (P = 0.005). Surgical oncology-trained surgeons were more likely than hepatobiliary/transplant-trained surgeons to choose C → LR (OR 2.53) or PC (OR 4.15) (P < 0.001).

CONCLUSIONS

This is the first nationwide study to define the relative impact of key clinical factors on choice of therapy for CLM. Although clinical factors influence choice of therapy, surgical subspeciality and physician experience are also important determinants of care.

Understanding surgical decision making in early hepatocellular carcinoma

PURPOSE

The choice between liver transplantation (LT), liver resection (LR), and radiofrequency ablation (RFA) as initial therapy for early hepatocellular carcinoma (HCC) is controversial, yet little is known about how surgeons choose therapy for individual patients. We sought to quantify the impact of both clinical factors and surgeon specialty on surgical decision making in early HCC by using conjoint analysis.

METHODS

Surgeons with an interest in liver surgery were invited to complete a Web-based survey including 10 case scenarios. Choice of therapy was then analyzed by using regression models that included both clinical factors and surgeon specialty (non-LT v LT).

RESULTS

When assessing early HCC occurrences, non-LT surgeons (50% LR; 41% LT; 9% RFA) made significantly different recommendations compared with LT surgeons (63% LT; 31% LR; 6% RFA; P < .001). Clinical factors, including tumor number and size, type of resection required, and platelet count, had significant effects on the choice between LR, LT, and RFA. After adjusting for clinical factors, non-LT surgeons remained more likely than LT surgeons to choose LR compared with LT (relative risk ratio [RRR], 2.67). When the weight of each clinical factor was allowed to vary by surgeon specialty, the residual independent effect of surgeon specialty on the decision between LR and LT was negligible (RRR, 0.93).

CONCLUSION

The impact of surgeon specialty on choice of therapy for early HCC is stronger than that of some clinical factors. However, the influence of surgeon specialty does not merely reflect an across-the-board preference for one therapy over another. Rather, certain clinical factors are weighed differently by surgeons in different specialties.

Vignette studies of medical choice and judgement to study caregivers' medical decision behaviour: systematic review

Background

Vignette studies of medical choice and judgement have gained popularity in the medical literature. Originally developed in mathematical psychology they can be used to evaluate physicians' behaviour in the setting of diagnostic testing or treatment decisions. We provide an overview of the use, objectives and methodology of these studies in the medical field.

Methods

Systematic review. We searched in electronic databases; reference lists of included studies. We included studies that examined medical decisions of physicians, nurses or medical students using cue weightings from answers to structured vignettes. Two reviewers scrutinized abstracts and examined full text copies of potentially eligible studies. The aim of the included studies, the type of clinical decision, the number of participants, some technical aspects, and the type of statistical analysis were extracted in duplicate and discrepancies were resolved by consensus.

Results

30 reports published between 1983 and 2005 fulfilled the inclusion criteria. 22 studies (73%) reported on treatment decisions and 27 (90%) explored the variation of decisions among experts. Nine studies (30%) described differences in decisions between groups of caregivers and ten studies (33%) described the decision behaviour of only one group. Only six studies (20%) compared decision behaviour against an empirical reference of a correct decision. The median number of considered attributes was 6.5 (IQR 4–9), the median number of vignettes was 27 (IQR 16–40). In 17 studies, decision makers had to rate the relative importance of a given vignette; in six studies they had to assign a probability to each vignette. Only ten studies (33%) applied a statistical procedure to account for correlated data.

Conclusion

Various studies of medical choice and judgement have been performed to depict weightings of the value of clinical information from answers to structured vignettes of care givers. We found that the design and analysis methods used in current applications vary considerably and could be improved in a large number of cases.

Resultados a largo plazo de la cirugía urgente y electiva del cáncer de colon. Estudio comparativo

INTRODUCTION

Currently, the mechanisms that worsen the prognosis of complicated colon cancers are still not well known. Moreover, the possible effect of using sound oncological principles in emergency surgery on long-term prognosis has not been studied in detail.

AIMS

The aim of the present study was to analyze the 5-year efficacy of curative oncological surgery for complicated colon cancer performed in an emergency setting in terms of tumor recurrence and survival compared with elective surgery of uncomplicated tumors.

PATIENTS AND METHOD

We performed a prospective observational cohort study in patients who underwent emergency surgery for complicated colon cancer (group 1) and patients who underwent elective surgery (group 2). Exclusion criteria were tumors of less than 15 cm from the anal verge, palliative surgery, and distant metastases.

RESULTS

During the study period, 646 patients underwent surgery: there were 165 (25.5%) emergency surgeries and 481 (74.5%) elective interventions. Surgery was considered curative in 456 (70.6%) patients: 102 (22.4%) emergency and 354 (77.6%) elective surgeries. Significant differences were found in disease stage between the 2 groups (P = 0.003). The postoperative mortality rate was 12.7% in group 1 and 3.4% in group 2 (P = 0.001). When patients were stratified by TNM stage, worse 5-year cancer-related and disease-free survival rates were observed in group 1 patients with stage II tumors. No differences were found in cancer-related survival rates in stage III patients (P = 0.178). There were no significant differences in overall survival, cancer-related survival or tumor recurrence rates when group 1 was compared with a subgroup of patients in group 2 with factors of poor prognosis.

CONCLUSIONS

Complicated colon cancer presents in more advanced stages and had a worse overall long-term prognosis than uncomplicated tumour. These differences decrease when patients are subclassified by tumoral stage. Overall survival and cancer-related survival rates similar to those of elective surgery can be achieved in emergency surgery when curative oncological resection is performed.

Prioritising patients on surgical waiting lists: a conjoint analysis study on the priority judgements of patients, surgeons, occupational physicians, and general practitioners

The prioritisation of patients on waiting lists is ascribed high potential for diminishing the consequences of waiting times for elective surgery. However, consistent evidence is lacking about which factors determine patient priority and it is unclear whether different stakeholders have different opinions on this issue. This study, conducted in the Netherlands, investigates the judgements of patients, laypersons (i.e. patients on other waiting lists), and physicians on the priority of patients on waiting lists. Participants were former patients with varicose veins (N=82), inguinal hernia (N=86), and gallstones (N=89), 101 surgeons, 95 occupational physicians, and 65 general practitioners. Each participant judged the priority of paper vignettes of patients with varicose veins, inguinal hernia, and gallstones. The vignettes were designed according to conjoint analysis methodology and described the physical symptoms, the psychological distress, the social limitations, and impairments in work of patients. Multilevel regression analysis of the responses showed that all groups made significant distinctions in patient priority depending on the severity of each characteristic in the vignettes. The physical symptoms and impairments in work had on average the highest impact on priority, but the summed impact of non-physical factors exceeded that of the physical symptoms. The different groups of participants appraised only the importance of the physical symptoms differently, but opinions on priority varied widely within each group. Whereas the high level of agreement between the different groups would facilitate the acceptance and the implementation of explicit prioritisation of patients on the waiting list, the high inter-individual variation signifies that consensus criteria for prioritisation are needed to warrant equity and transparency in care provision.

One-stage laparoscopic colorectal resection after placement of self-expanding metallic stents for colorectal obstruction: a prospective study

The aim of this study was to assess the clinical outcomes of self-expandable metallic stents placing followed by laparoscopic resection and primary anastomosis for the treatment of acute colonic obstruction. From January 2003 to December 2004, 14 patients diagnosed with acute and complete colonic obstruction were treated with endoscopic colonic stenting as a bridge to an elective 1-stage laparoscopic resection. Three patients who underwent a successful stent insertion but had an inoperable tumor were excluded from the analyzed data. Ninety-three percent technical and clinical success was achieved. The stent insertion related perforation rate was 7% (1/14). The mean duration of stent insertion was approximately 1 hour and the mean time between the stent insertion and surgery was 6.2 days. Mean operating time was 132 +/- 38 minutes. No cases required conversion to laparotomy and there were no intraoperative complications. One case of anastomotic leakage was observed and treated by laparoscopic drainage and protective ileostomy. Ambulation time after operation was 1.8 +/- 0.6 days and total hospital stay length was 16.4 +/- 5.0 days. During a period of 11 +/- 7 months of follow-up, neither recurrences nor port-site metastases were observed. The management of acute colonic obstruction using endoscopic stent decompression, followed by laparoscopic resection, had good results and can be considered feasible and safe. Larger comparative studies may help to establish this approach.

La cirugía en el cáncer de colon complicado

Colorectal cancer continues to have a serious social impact. A large proportion of patients are diagnosed at an advanced stage of the disease. Approximately one-third of patients with colorectal cancer will undergo emergency surgery for a complicated tumor, with a high risk of mortality and poorer long-term prognosis. The most frequent complications are obstruction and perforation, while massive hemorrhage is rare. The curative potential of surgery, whether urgent or elective, depends on how radical the resection is, among other factors. In the literature on the management of urgent colorectal disease, there are few references to the oncological criteria for resection. Uncertainly about the optimal treatment has led to wide variability in the treatment of this entity. The present article aims to provide a critical appraisal of the controversies surrounding the role of surgery and its impact on complicated colorectal cancer.

A prospective study of outcomes of emergency and elective surgeries for complicated colonic cancer

BACKGROUND

Although a significantly decreased long-term survival has been observed in patients undergoing surgery for complicated colorectal tumors compared with uncomplicated ones, the role of radical oncologic surgery on emergency colonic cancer is not defined clearly. The aim of this study was to analyze the efficacy of a curative emergency surgery in terms of tumor recurrence and cancer-related survival compared with elective colonic surgery.

METHODS

Between January 1996 and December 1998, all patients with colonic cancer deemed to have undergone a curative resection were considered for inclusion in this prospective study. Patients were classified into 2 groups: group 1, after emergency surgery for complicated colonic cancer, and group 2, patients undergoing elective surgery. The main end points were cancer-related survival and the probability of being free from recurrence at 3 years.

RESULTS

Of the 266 patients included in the study, 59 patients (22.2%) were in group 1 and 207 patients (77.8%) were in group 2. Postoperative mortality was higher in group 1 (P=.0004). After patients were stratified by the tumor node metastasis system, differences between the groups with respect to overall survival of stage II tumors (P=.0728), the probability of being free from recurrence (P=.0827), and cancer-related survival (P=.1071) of stage III cancers did not reach statistical significance. Differences were observed for the overall survival in stage III tumors (P=.0007), and for the probability of being free from recurrence (P=.0011) and cancer-related survival (P=.0029) in stage II cancers. When patients with elective stage II tumors presenting 1 or more negative prognostic factor were compared with emergency patients affected by a stage II colonic cancer, no differences were observed.

CONCLUSION

Curative surgeries for complicated colonic cancer are acceptable in emergency conditions. Cancer-related survival and recurrence in patients with complicated colonic cancers may approach that of elective surgery if a surgical treatment with radical oncologic criteria is performed.

Resultados y factores pronósticos de mortalidad en la intervención de Hartmann

INTRODUCTION

The introduction of one-stage procedures in emergency colonic surgery many years ago has relegated the use of the Hartmann procedure to the most seriously-ill patients, which has led to the high morbidity and mortality rates associated with this surgical technique. The aim of our study was to investigate our results using Hartmanns procedure and to evaluate several prognostic factors of postoperative mortality in this group of patients.

PATIENTS AND METHODS

From January 1995 to December 2000, 79 patients (34 men and 45 women) with a mean age of 71.5 years underwent Hartmanns operation. Almost all the series (91.1%) had comorbidities. In this group of patients, morbidity and mortality were analyzed retrospectively, and a multivariate logistic regression analysis was performed to study prognostic factors of postoperative mortality.

RESULTS

The indications for surgery were acute peritonitis (77.2%), intestinal obstruction (18.9%), and lower gastrointestinal hemorrhage (3.7%). The most frequent etiology was acute diverticulitis (36 patients), followed by complicated colorectal carcinoma (18 patients). In 70.9% of the patients (56 patients) one or more postoperative complications was observed. Reoperation was performed in 15 patients (18.9%) and overall postoperative mortality was 45.5%. Renal failure (creatinine > or = 120 micromol/l) and high surgical ASA score (III or IV) reached statistical significance as predictive factors of mortality in these patients (p=.001 and p=.005, respectively).

CONCLUSION

The patients who underwent Hartmanns procedure with high surgical ASA score and/or renal failure were at significantly higher risk of mortality.

Large bowel obstruction: predictive factors for postoperative mortality

PURPOSE

The aims of this study were to assess the prognostic value for mortality of several factors in patients with colonic obstruction and to study the differences between proximal and distal obstruction.

METHODS

Two-hundred and thirty-four consecutive patients who underwent emergency surgery for colonic obstruction were studied. Patients with an obstructive lesion distal to the splenic flexure were assessed as having a distal colonic obstruction. Resection and primary anastomosis was the operation of choice in selected patients. Alternative procedures were Hartmann's procedure in high-risk patients, subtotal colectomy in cases of associated proximal colonic damage, and colostomy or intestinal bypass in the presence of irresectable lesions. Obstruction was considered proximal when the tumor was situated at the splenic flexure or proximally and a right or extended right colectomy was performed. A range of factors were investigated to estimate the probability of death: gender, age, American Society of Anesthesiologists score, nature of obstruction (benign vs. malign), location of the lesion (proximal vs. distal), associated proximal colonic damage and/or peritonitis, preoperative transfusion, preoperative renal failure, and laboratory data (hematocrit < or = 30 percent, hemoglobin < or = 10 g/dl, and leukocyte count >15,000/mm3). Univariate and multivariate forward steptwise logistic regression analysis was used to study the prognostic value of each significant variable in terms of mortality.

RESULTS

One or more complications were detected in 109 patients (46.5 percent). Death occurred in 44 patients (18.8 percent). No differences were observed between proximal and distal obstruction. Age (>70 years), American Society of Anesthesiologists III-IV score, preoperative renal failure, and the presence of proximal colon damage with or without peritonitis were significantly associated with postoperative mortality in the univariate analysis. Only American Society of Anesthesiologists score, presence of proximal colon damage, and preoperative renal failure were significant predictors of outcome in multivariate logistic regression.

CONCLUSION

Large bowel obstruction still has a high of mortality rate. An accurate preoperative evaluation of severity factors might allow stratification of patients in terms of their mortality risk and help in the decision-making process for treatment. Such an evaluation would also enable better comparison between studies performed by different authors. Principles and stratification similar to those of distal lesions should be considered in patients with proximal colonic obstruction.

Guideline adherence rates and interprofessional variation in a vignette study of depression

OBJECTIVE

To assess the appropriateness of and variation in intention-to-treat decisions in the management of depression in the Netherlands.

DESIGN

Mailed survey with 22 paper cases (vignettes) based on a population study.

SETTING

A random sample from four professional groups in the Dutch mental healthcare system.

SUBJECTS

264 general practitioners, psychiatrists, psychotherapists, and clinical psychologists.

MAIN OUTCOME MEASURES

Each vignette contained information on a number of patient characteristics taken from three national depression guidelines. The distribution of patient characteristics was based on data from a population study. Respondents were asked to choose the best treatment option and the best treatment setting. For each vignette we examined which of the selected treatments was appropriate according to the recommendations of the three published Dutch clinical guidelines and a panel of experts.

RESULTS

31% of all intention-to-treat decisions were not consistent with the guidelines. Overall, less severe depression, alcohol abuse, psychotic features, and lack of social resources were related to more inappropriate judgements. There was considerable variation between the professional groups: psychiatrists made more appropriate choices than the other professions although they had the highest rate of overtreatment.

CONCLUSIONS

There is sufficient variation in the intentions to treat depression to give it priority in quality assessment and guideline development. Efforts to achieve appropriate care should focus on treatment indications, referral patterns, and overtreatment.

Prospective study of primary anastomosis following sigmoid resection for suspected acute complicated diverticular disease

BACKGROUND

A primary anastomosis after resection of the sigmoid colon for suspected acute complicated diverticular disease has the advantage of saving the patient a secondary operation for restoring bowel continuity. Fear of anastomotic leakage often deters surgeons from making a primary anastomosis.

METHODS

A series of 45 patients who underwent primary anastomosis was studied prospectively to evaluate the feasibility of a primary anastomosis following acute sigmoid resection. Acute Physiology and Chronic Health Evaluation (APACHE) II score, Mannheim Peritonitis Index (MPI) and Hughes' peritonitis classification were used to classify patients and to detect factors predictive of postoperative outcome. Death, anastomotic leakage and septic complications were main outcome measures.

RESULTS

Neither anastomotic leakage (four of 45 patients) nor death (three of 45) was related to a higher MPI, APACHE II or Hughes' score. More postoperative septic complications were seen in patients with a MPI over 16. Death, anastomotic leakage, reintervention and wound infection were observed more frequently in patients who presented with colonic obstruction than in those with abscess or perforation.

CONCLUSION

Primary anastomosis is safe and effective in non-obstructed cases of complicated diverticular disease. Colonic obstruction seems to be a risk factor for the development of postoperative complications.

One-stage procedure in non-elective surgery for diverticular disease complications

OBJECTIVE

Admission of patients with acute complications of diverticular disease is frequent and operative management remains controversial. The aim of this study was to investigate the efficacy and safety of resection, intra-operative colonic lavage and primary anastomosis in patients who require urgent laparotomy to treat complications of diverticular disease.

PATIENTS AND METHODS

From January 1992 to December 1999, 124 surgical patients underwent emergency operation for complicated diverticular disease. Resection, intra-operative colonic lavage and primary anastomosis were carried out in 55 patients: four with obstruction, two with massive bleeding and 49 with diverticulitis. In the diverticulitis group, 33 (67.3%) patients presented with localized peritonitis and 16 (32.7%) with generalized purulent peritonitis. No patient with faecal peritonitis was treated by a one-stage procedure.

RESULTS

One or more complications were detected in 25 patients (45.4%). Four patients (7.2%) required reintervention. Mortality occurred in four patients (7.2%). Two patients (3.6%) presented with anastomotic leakage. Wound infection was detected in 16 cases (29%). The overall mean (s.d.) Hospital stay was 18.5 (12.1) days.

CONCLUSION

Resection, intra-operative colonic lavage and primary anastomosis provide an alternative procedure for achieving one-stage resection in selected patients who require emergency operation for complication of diverticular disease.

Prognostic factors for mortality in left colonic peritonitis: a new scoring system

BACKGROUND

Perforating lesions of the colon affect a heterogeneous group of patients, often elderly, and usually present as abdominal emergencies, with high morbidity and mortality. The aims of this study were to assess the prognostic value of specific factors in patients with left colonic peritonitis and to evaluate the utility of a scoring method that allows one to define groups of patients with different mortality risks.

STUDY DESIGN

Between January 1994 and December 1999, 156 patients (77 men and 79 women), with a mean (SD) age of 63.2 years (15.5 years) (range 22 to 87 years), underwent emergency operation for a distal colonic perforation. Intraoperative colonic lavage was the first choice operation and it was performed in 74 patients (47.4%). There were three alternative procedures: the Hartmann operation was performed in 69 patients (44.2%), subtotal colectomy in 9, and colostomy in 4 patients. We analyzed specific variables for their possible relation to death including gender, age, American Society of Anesthesiologists (ASA) score, immunocompromised status, etiology, and degree of peritonitis, preoperative organ failure, time (hours) between hospital admission and surgical intervention, and degree of temperature elevation (38 degrees C). Univariate relations between predictors and outcomes (death) were analyzed using logistic regression. Multivariate logistic regression analysis was used to assess the prognostic value of combinations of the variables. Significant factors identified in univariate and multivariate logistic regression analyses were used to define a left colonic Peritonitis Severity Score (PSS). Factors that were significant only in univariate analysis scored 2 points if present and 1 if not. Variables significant in multivariate analysis were scored from 1 to 3 points. Patients were randomly split into two groups, one to calculate the scoring system and the other to validate it.

RESULTS

Overall postoperative mortality rate was 22.4%. Septic-related mortality was observed in 24 patients (15.4%). Age, peritonitis grade, ASA score, immunocompromised status, and ischemic colitis were significant for postoperative death in univariate analysis. But only ASA score and preoperative organ failure were significantly associated with postoperative mortality in multivariate logistic regression analysis. The PSS, as defined in this study, was related to outcomes of patients. Mortality rate increased from 0%, when PSS was 6 points (minimum possible score), to 100% in patients with a PSS of 13 (maximum possible PSS = 14).

CONCLUSIONS

Left colonic peritonitis continues to have a persistently high mortality in patients with septic complications. ASA score and preoperative organ failure are the only factors that are significantly associated with mortality in the multivariate analysis. The PSS classification may help uniformly define the mortality risk of patients with distal large bowel peritonitis, and may help to increase the comparability of studies carried out at different centers.

Surgical management of severe secondary peritonitis

BACKGROUND

Despite advances in diagnosis, surgery, antimicrobial therapy and intensive care support, the mortality rate associated with severe secondary peritonitis remains unacceptably high. This article presents various surgical treatment strategies for severe secondary peritonitis, emphasizing the role of open management of the abdomen and planned relaparotomies.

METHODS

Material was identified from previous review articles, references cited in original papers and a Medline search of the literature.

RESULTS AND CONCLUSION

Surgical treatment of severe secondary peritonitis is highly demanding and very complex. The combination of improved surgical techniques, antimicrobial therapy and intensive care support has improved the outcome of such peritonitis following perforation or anastomotic disruption of the digestive tract, or infected necrotizing pancreatitis. However, aggressive surgical treatment strategies, such as open management of the abdomen and planned relaparotomies, may have reached their limits.