Predicting Conversion from Laparoscopic to Open Cholecystectomy: A Single Institution Retrospective Study

Abnormal blood glucose on admission and outcomes in older patients with acute calculous cholecystitis

INTRODUCTION

We investigated the potential correlation between abnormal blood glucose on admission and clinical outcomes of acute calculus cholecystitis in older patients.

AREAS COVERED

We included older patients (≥65 years) diagnosed with acute calculus cholecystitis. The first plasma glucose measurement obtained at admission was used. Overall, 280 older patients were evaluated. The results showed that ABG was significantly associated with more severe systemic inflammatory responses (elevated white blood cell count and neutrophil-lymphocyte ratio), a higher incidence of moderate to severe ACC, and the need for invasive treatment (an increased proportion of percutaneous cholecystostomy and combined surgeries). The prolonged hospital stay, 30-day readmission rate and mortality rate of patients in the ABG group were significantly increased, and the incidence of severe postoperative complications (Clavien-Dindo≥grade III) was higher. Multivariate analysis confirmed that ABG was an independent predictor of the severity of ACC (TG18 classification) and 30-day re-admission rate.

EXPERT OPINION/COMMENTARY

In older patients with acute calculus cholecystitis, abnormal blood glucose on admission is associated with worse outcomes, serving as a novel quantifiable risk criterion to guide treatment selection, particularly for high-risk older adults ineligible for early surgery.

Predictive Factors for Converting Endoscopic to Open Carpal Tunnel Release

Introduction: Both open and endoscopic methods of carpal tunnel release are accepted treatments for carpal tunnel syndrome. The objective was to determine the endoscopic to open conversion rate of all carpal tunnel surgeries. We evaluated potential predictive factors for an increased rate of conversion. Methods: The IRB/IRBnet approved (#20210613/1639264) a retrospective chart review of all attempted endoscopic carpal tunnel surgeries performed from July 1, 2012 through June 30, 2021. Charts were reviewed for procedure, age, sex, body mass index (BMI), electromyograph (EMG) reading, wrist arthritis on x-ray, preoperative steroid injections, trainee as surgeon, diabetes, hand dominance, and operated side. Conversion rate was noted. A chi-square test using a P-value of <0.05 was used to determine the statistical significance of the patients' age, sex, BMI, EMG severity, the presence of wrist arthritis, preoperative steroid injections, resident as surgeon, diabetic status, and operated hand dominance as predictive factors for conversion. Results: The plastic surgery service attempted 1053 endoscopic carpal tunnel releases using the Chow dual port technique over a 9-year period. Forty-five cases converted to an open release. Median age (P = 0.54), sex (P = 0.43), median BMI (P = 0.76), EMG severity (P = 0.20), wrist arthritis (P = 1.0), preoperative steroid injections (P = 0.65), resident surgeon (P = 0.53), diabetes (P = 0.50), and operated hand dominance (P = 0.36) were not statistically significant predictive risk factors. Nineteen of 45 converted cases had a future successful contralateral endoscopic release. Conclusion: Our study found a 4.27% endoscopic to open conversion rate. No identifiable risk factors could predict conversion. Prior conversion does not determine a future contralateral conversion.

Evaluation of Risk Factors Leading to Conversion from Laparoscopic Cholecystectomy to Open Surgery: A Retrospective Controlled Study

Background: Laparoscopic cholecystectomy (LC) is one of the most frequently performed operations in surgical practice. Despite increasing experience and technological advances, conversion to open surgery is still necessary in some cases. Although several studies have identified factors associated with increased risk of conversion, debates continue in the literature. This study aimed to evaluate the factors affecting the risk of conversion to open cholecystectomy. Materials and Methods: Patients who underwent surgery for cholelithiasis between 2020 and 2023 were analyzed retrospectively. Patients who underwent open cholecystectomy, those who had cholecystectomy as part of another surgical procedure, and patients with gallbladder malignancy (except incidental cases) were excluded from the study. Patients were analyzed based on demographic, clinical, laboratory, radiological, and histopathological data. This study was registered at ClinicalTrials.gov (NCT06244589). Results: A total of 1695 patients were included in the study. The median age was 50 years, and 66.6% of patients were female. Conversion from LC to open surgery occurred in 44 patients (2.6%). Multivariate analysis identified male sex, a history of major abdominal surgery, the need for emergency surgery due to acute cholecystitis, an elevated leukocyte count, and gallbladder wall thickening on abdominal ultrasonography as independent risk factors for conversion to open cholecystectomy. Conclusion: Male gender, previous major abdominal surgery, emergency surgery due to acute cholecystitis, high leukocyte count, and gallbladder wall thickening on abdominal ultrasonography are independent risk factors for conversion from LC to open surgery. It should be kept in mind in the treatment of patients planned for LC.

Standardization of a goal-oriented approach to acute cholecystitis: easy-to-follow steps for performing subtotal cholecystectomy

BACKGROUND

A critical view of safety (CVS) is important to ensure safe laparoscopic cholecystectomy. When the CVS is not possible, subtotal cholecystectomy is performed. While considering subtotal cholecystectomy, surgeons are often concerned about preventing bile leakage from the cystic ducts. The two main types of subtotal cholecystectomy for acute cholecystitis are fenestrating and reconstituting. Previously, there were no selection criteria for these two; therefore, open conversion was performed. This study aimed to evaluate our goal-oriented approach to choose fenestrating or reconstituting subtotal cholecystectomy for acute cholecystitis.

METHODS

We introduced our goal-oriented approach in April 2019. Before introducing this approach, laparoscopic cholecystectomy for acute cholecystitis was performed without criteria for subtotal cholecystectomy. After our approach was introduced, laparoscopic cholecystectomy for acute cholecystitis was performed according to the subtotal cholecystectomy criteria. We retrospectively reviewed the medical records of patients who underwent laparoscopic cholecystectomy for acute cholecystitis between 2015 and 2021. Laparoscopic cholecystectomy for acute cholecystitis was performed by surgeons regardless of whether they were novices or veterans.

RESULTS

The period from April 2015 to March 2019 was before the introduction (BI) of our approach, the period from April 2019 to December 2021 was after the introduction (AI) of our approach. There were 177 and 186 patients with acute cholecystitis during the BI and AI periods, respectively. There were no significant differences between groups in terms of preoperative characteristics, operative time, and blood loss. No difference in the laparoscopic subtotal cholecystectomy rate between groups (10.2% [BI] vs. 13.9% [AI]; p = 0.266) was obserbed. The open conversion rate during the BI period was significantly higher than that during the AI period (7.4% vs. 1.6%; p = 0.015).

CONCLUSIONS

Our goal-oriented approach is feasible, safe, and easy for many surgeons to understand.

Converting From Laparoscopic Cholecystectomy to Open Cholecystectomy: A Systematic Review of Its Advantages and Reasoning

Cholecystectomy is the standard treatment for symptomatic cholelithiasis and asymptomatic impending biliary obstruction, which is typically carried out laparoscopically. However, difficult gallbladders, due to distorted anatomy or increased risk of bleeding, can necessitate conversion to open surgery. This systematic review evaluates the advantages, disadvantages, complications, and outcomes of laparoscopic versus converted open cholecystectomy. We screened articles published from 2011 to 2024 by utilizing advanced filters of PubMed, Cochrane, and Scholar databases. Exclusion criteria included non-English language articles, duplicates, and animal studies. After analyzing relevant articles, 31 articles were included in this study. The total number of participants who underwent laparoscopic procedures was 28,054, of which 5,847 were converted from laparoscopic to open procedures. Conversions were primarily due to bleeding, adhesions, and obscured anatomy, with bile leakage being the most common short-term complication. Converted cases showed higher rates of long-term complications, increased hospital stays, and higher morbidity and mortality. Laparoscopic cholecystectomy remains safe and effective, but identifying high-risk patients for conversion is important. Preoperative identification of high-risk patients and recognizing predictive factors for conversion can enhance surgical outcomes and cost-effectiveness. While laparoscopic cholecystectomy is generally preferred, timely conversion to open surgery is essential for patient safety.

Laparoscopic Conversion to Open Cholecystectomy: Is Incidental Gallbladder Cancer Any Different?

BACKGROUND

A majority of gallbladder cancers present incidentally. Operative risk factors and outcomes for laparoscopic converted to open cholecystectomy in incidental gallbladder cancer are not well characterized.

METHODS

Patients with incidental gallbladder cancer and acute cholecystitis undergoing laparoscopic cholecystectomy and conversion to open cholecystectomy in the National Surgical Quality Improvement Program (NSQIP) database of the American College of Surgeons (ACS) from 2010-2019 were reviewed. The primary endpoint was risk factors for conversion to open cholecystectomy in incidental gallbladder cancer. Chi-squared test or Fisher's exact test was used for categorical variables. Continuous variables were compared using the Mann-Whitney U test.

RESULTS

A total of 5,789 patients undergoing laparoscopic cholecystectomy were identified, of which, 50 (0.9%) had incidental gallbladder cancer. For incidental gallbladder cancer patients, there were no differences in preoperative profile and risk factors between laparoscopic and converted to open cholecystectomy groups. Incidental carcinoma patients undergoing conversion to open cholecystectomy had lower preoperative sodium levels than the laparoscopic cholecystectomy group (P=0.007). Hospital length of stay (days) was longer for those with a conversion to open cholecystectomy for incidental carcinoma compared to non-conversion, 14 (10.8, 18.8) vs 2 (0.3, 5) (P=0.004). The patients converted to open cholecystectomy also had higher rates of postoperative sepsis (50% vs 0%, P<0.001) and reoperation than the laparoscopic cohort (50% vs 2.2%, P<0.001). Readmission and mortality rates, among other complications, were not significantly different between both surgical approaches in incidental gallbladder cancer patients.

CONCLUSIONS

 Patients with conversion to open cholecystectomy had worse outcomes including longer hospital stays and higher rates of sepsis and reoperation. It remains difficult to predict which incidental gallbladder patients will require a conversion to open surgery. Further study examining whether more complicated recovery results in worse oncologic outcomes is warranted.

Current Operative Approaches to the Diseased Gallbladder. Diagnosis and Management Updates for General Surgeons

Cholecystitis is a common diagnosis which requires management by general surgeons. Morbidity from cholecystitis is often life-threatening, especially in patients with underlying liver cirrhosis or other medical comorbidities. Diagnosis and management of this disease can vary among providers and hospitals. The decision to utilize a radiological or endoscopic temporizing maneuver in severe acute cholecystitis and the timing of later definitive cholecystectomy are relevant points of discussion within general surgery societies. In the last 5 years, the use of intraoperative ductal imaging by conventional vs fluorescence cholangiography had gained significant interest due to the widespread availability of indocyanine green. Finally, the operative strategies and how to manage intra-/postoperative complications are very important to optimizing patient outcomes. In this review paper, we discuss all treatment aspects of cholecystitis and provide updates in its management.

External application of mirabilite before surgery can reduce the inflammatory response and accelerate recovery in mild acute biliary pancreatitis

OBJECTIVE

Mild acute biliary pancreatitis (MABP) is one of the most common diseases that require surgical treatment. Previous studies have focused on the timing of laparoscopic cholecystectomy (LC) for MABP. However, the impact of its inflammatory response process on the clinical outcome has been rarely reported. This study aimed to investigate the effect of preoperative external application of mirabilite on the inflammatory response and clinical efficacy in MABP.

METHODS

Medical records of patients undergoing LC due to MABP from November 2017 to June 2022 were retrospectively reviewed. Prior to surgery, the control group received the same baseline treatment measures as the study group. The difference was the addition of external application of mirabilite in the study group.

RESULTS

A total of 75 patients were included in the final analysis: 38 patients in the mirabilite group and 37 patients in the control group. Repeated-measures ANOVA (P < 0.01) showed that the white blood cell count (WBC) on the 3rd day of admission and the WBC and C-reactive protein (CRP) level on the 5th day of admission decreased rapidly and significantly in the mirabilite group, compared with the control group. The mirabilite group had earlier anal exhaust time. The number of patients in the mirabilite group and control group with gallbladder wall ≥ 3 mm before the operation was 16 (42.11%) vs. 24 (64.86%), p = 0.048, respectively; and the number of cases with surgical drain placement was 2 (5.26%) vs. 9 (24.32%), p = 0.020, respectively. The intraoperative modified American Fertility Society (mAFS) score of adhesions was lower in the mirabilite group (1.08 ± 0.59 points) than in the control group (1.92 ± 0.60 points), p = 0.000. The mirabilite group, compared to the control group, p = 0.000, had a short waiting time for surgery (5.68 ± 0.70 days vs. 6.54 ± 0.59 days), short operation time (38.03 ± 5.90 min vs. 48.51 ± 8.37 min), and reduced hospitalization time (8.95 ± 0.96 days vs. 9.84 ± 1.07 days).

CONCLUSION

This study demonstrated that preoperative external application of mirabilite can reduce the inflammatory response, decrease the edema and peribiliary adhesions at the surgical site, and accelerate recovery in MABP.

Preoperative Risk Factors for Conversion from Laparoscopic to Open Cholecystectomy: A Systematic Review and Meta-Analysis

Laparoscopic cholecystectomy is a standard treatment for patients with gallstones in the gallbladder. However, multiple risk factors affect the probability of conversion from laparoscopic cholecystectomy to open surgery. A greater understanding of the preoperative factors related to conversion is crucial to improve patient safety. In the present systematic review, we summarized the current knowledge about the main factors associated with conversion. Next, we carried out several meta-analyses to evaluate the impact of independent clinical risk factors on conversion rate. Male gender (OR = 1.907; 95%CI = 1.254−2.901), age > 60 years (OR = 4.324; 95%CI = 3.396−5.506), acute cholecystitis (OR = 5.475; 95%CI = 2.959−10.130), diabetes (OR = 2.576; 95%CI = 1.687−3.934), hypertension (OR = 1.931; 95%CI = 1.018−3.662), heart diseases (OR = 2.947; 95%CI = 1.047−8.296), obesity (OR = 2.228; 95%CI = 1.162−4.271), and previous upper abdominal surgery (OR = 3.301; 95%CI = 1.965−5.543) increased the probability of conversion. Our analysis of clinical factors suggested the presence of different preoperative conditions, which are non-modifiable but could be useful for planning the surgical scenario and improving the post-operatory phase.

The critical view of safety during laparoscopic cholecystectomy: Strasberg Yes or No? An Italian Multicentre study

BACKGROUND

Laparoscopic cholecystectomy is considered the gold standard for the treatment of gallbladder lithiasis; nevertheless, the incidence of bile duct injuries (BDI) is still high (0.3-0.8%) compared to open cholecystectomy (0.2%). In 1995, Strasberg introduced the "Critical View of Safety" (CVS) to reduce the risk of BDI. Despite its widespread use, the scientific evidence supporting this technique to prevent BDI is controversial.

METHODS

Between March 2017 and March 2019, the data of patients submitted to laparoscopic cholecystectomy in 30 Italian surgical departments were collected on a national database. A survey was submitted to all members of Italian Digestive Pathology Society to obtain data on the preoperative workup, the surgical and postoperative management of patients and to judge, at the end of the procedure, if the isolation of the elements was performed according to the CVS. In the case of a declared critical view, iconographic documentation was obtained, finally reviewed by an external auditor.

RESULTS

Data from 604 patients were analysed. The study population was divided into two groups according to the evidence (Group A; n = 11) or absence (Group B; N = 593) of BDI and perioperative bleeding. The non-use of CVS was found in 54.6% of procedures in the Group A, and 25.8% in the Group B, and evaluating the operator-related variables the execution of CVS was associated with a significantly lower incidence of BDI and intraoperative bleeding.

CONCLUSIONS

The CVS confirmed to be the safest technique to recognize the elements of the Calot triangle and, if correctly performed, it significantly impacted on preventing intraoperative complications. Additional educational programs on the correct application of CVS in clinical practice would be desirable to avoid extreme conditions that may require additional procedures.

The Analysis of Risk Factors in the Conversion from Laparoscopic to Open Cholecystectomy

Laparoscopic cholecystectomy is a standard treatment for cholelithiasis. In situations where laparoscopic cholecystectomy is dangerous, a surgeon may be forced to change from laparoscopy to an open procedure. Data from the literature shows that 2 to 15% of laparoscopic cholecystectomies are converted to open surgery during surgery for various reasons. The aim of this study was to identify the risk factors for the conversion of laparoscopic cholecystectomy to open surgery. A retrospective analysis of medical records and operation protocols was performed. The study group consisted of 263 patients who were converted into open surgery during laparoscopic surgery, and 264 randomly selected patients in the control group. Conversion risk factors were assessed using logistic regression analysis that modeled the probability of a certain event as a function of independent factors. Statistically significant factors in the regression model with all explanatory variables were age, emergency treatment, acute cholecystitis, peritoneal adhesions, chronic cholecystitis, and inflammatory infiltration. The use of predictive risk assessments or nomograms can be the most helpful tool for risk stratification in a clinical scenario. With such predictive tools, clinicians can optimize care based on the known risk factors for the conversion, and patients can be better informed about the risks of their surgery.

The Need for Accurate Risk Assessment in a High-Risk Patient Population: A NSQIP Study Evaluating Outcomes of Cholecystectomy in the Patient With Cancer

BACKGROUND

Cholecystectomy is considered a low-risk procedure with proven safety in many high-risk patient populations. However, the risk of cholecystectomy in patients with active cancer has not been established.

METHODS

The American College of Surgeons National Surgical Quality Improvement Program (ACS NSQIP) database was queried to identify all patients with disseminated cancer who underwent cholecystectomy from 2005 to 2016. Postcholecystectomy outcomes were defined for patients with cancer and those without by comparing several outcomes measures. A multivariate model was used to estimate the odds of 30-d mortality.

RESULTS

We compared outcomes in 3097 patients with disseminated cancer to a matched cohort of patients without cancer. Patients with cancer had more comorbidities at baseline: dyspnea (10.5% versus 7.0%, P < 0.0001), steroid use (10.1% versus 3.0%, P < 0.0001), and loss of >10% body weight in 6-mo prior (9.3% versus 1.6%, P < 0.0001). Patients with cancer sustained higher rates of wound (2.3% versus 5.6%, P < 0.0001), respiratory (1.4% versus 3.9%, P < 0.0001), and cardiovascular (2.0% versus 6.8%, P < 0.0001) complications. In addition, patients with disseminated cancer experienced a longer length of stay and higher 30-d mortality. Multivariate modeling showed that the odds of 30-d mortality was 3.3 times greater in patients with cancer.

CONCLUSIONS

Compared to patients without cancer, those with disseminated cancer are at higher risk of complication and mortality following cholecystectomy. Traditional treatment algorithms should be used with caution and care decisions individualized based on the patient's disease status and treatment goals.

Identification of risk factors for open conversion from laparoscopic cholecystectomy for acute cholecystitis based on computed tomography findings

PURPOSE

Laparoscopic cholecystectomy (LC) is performed widely for acute cholecystitis (AC). This study was conducted to identify the predictors for conversion cholecystectomy (CC) for AC.

METHODS

The subjects of this study were 395 patients who underwent emergency surgery for AC between 2011 and 2019. Univariate and multivariate analyses were performed to establish the significance of the risk factors for CC in patients with grades II and III AC.

RESULTS

There were 162 TG18 GII and GIII patients in the LC group and 31 in the CC group. Univariate analysis revealed significant differences in performance status (p = 0.039), C-reactive protein levels (p = 0.016), albumin levels (p = 0.002), gallbladder (GB) wall thickness (p = 0.045), poor contrast of the GB wall (p = 0.035), severe inflammation around the GB (p < 0.001), enhancement of the liver bed (p = 0.048), and duodenal edema (p < 0.001) between the groups. Multivariate analysis identified hypoalbuminemia (p = 0.043) and duodenal edema (p = 0.014) as independent risk factors for CC.

CONCLUSIONS

Most patients with grade I AC underwent LC and had better surgical outcomes than those with grades II and III AC. The most appropriate surgical procedure should be selected based on preoperative imaging of the GB and the neighboring organs and by the presence of hypoalbuminemia.

Early outcomes of robotic extended cholecystectomy for the treatment of gallbladder cancer

BACKGROUND

Simple laparoscopic cholecystectomy is sufficient for patients with early gallbladder cancer (GBC). However, because advanced GBCs of T2 or more advanced stages require more complex procedures such as liver resection and lymph node dissection, minimally invasive surgery (MIS) has not been popularized. To evaluate the applicability of MIS for GBC, we report the early outcomes of robotic extended cholecystectomies (RECs).

METHODS

Thirteen patients who radiologically suspected to have T2 or more advanced stages of GBC underwent REC from February 2018 to April 2019. Thirty-nine patients who underwent open extended cholecystectomy were selected by 1:3 propensity score matching, and the differences of clinicopathologic features according to surgical methods were analyzed.

RESULTS

Compared with open method, operation time, estimated blood loss, postoperative complication rate, and number of retrieved lymph nodes were not significantly different. In REC group, duration of hospital stay was shorter (6.6 vs 8.3 days, P = .002) and postoperative pain was significantly lower in the REC group (P = .024).

CONCLUSION

The early outcomes of REC were favorable with regard to early recovery and less pain, with similar number of retrieved lymph nodes. REC is a promising option for treatment of GBC, but further long-term survival studies are needed.

Single-incision laparoscopic cholecystectomy with the right accessory hepatic duct diagnosed preoperatively: A case report

Accessory hepatic duct or gallbladder duplication is considered to be a risk factor for bile duct injuries and open conversion during laparoscopic cholecystectomy (LC). A 32-year-old woman with epigastric pain was referred to our department. Gallstone disease in the gallbladder was diagnosed by ultrasonography and magnetic resonance cholangiopancreatography. The involvement of an accessory hepatic duct was suspected during endoscopic retrograde cholangiography. Drip infusion cholangiography with computed tomography showed that the cystic duct merged with the accessory right hepatic duct. Single-incision LC (SILC) was successfully performed without bile duct injury. The operative time and intraoperative blood loss were 145 min and 1 mL, respectively. The patient was discharged 3 days' postoperatively, without complications. The involvement of the accessory right hepatic duct is a rare anomaly and is considered to be a risk factor for bile duct injuries. However, obtaining pre-operative images enabled us to perform SILC successfully.

Percutaneous cholecystostomy as treatment for acute cholecystitis: What has happened over the last five years? A literature review

Acute cholecystitis is one of the most frequent diseases faced by the general surgeon. In recent decades, different prognostic factors have been observed, and effective treatments described, to improve the results in patients with said pathology (lower morbidity and mortality, shorter hospital stay, and minimum conversion of laparoscopic to open procedures). In general, laparoscopic cholecystectomy is the standard treatment for acute cholecystitis, but it is not exempt from complications, especially in patients with numerous comorbidities or those that are critically ill. Percutaneous cholecystostomy emerged as a less invasive alternative for the treatment of acute cholecystitis in patients with organ failure or a prohibitive surgical risk. Even though it is an effective procedure, its usefulness and precise indications are subjects of debate. In addition, there is little evidence on cholecystostomy catheter management. We carried out a review of the literature covering the main aspects physicians involved in the management of acute cholecystitis should be familiar with.

Retrospective Analysis of Complications Associated with Laparoscopic Cholecystectomy for Symptomatic Gallstones

Introduction

Gallstones are the major cause of global morbidity. Laparoscopic approach has well-established advantages as compared to the conventional open procedure. It promises better recovery, lower morbidity, and lower postoperative pain, shortens the duration of hospital stay, and has a lower mortality rate. The aim of this study is to assess the frequency of complications in laparoscopic cholecystectomies indicated for symptomatic gallstones and also evaluate the rate of conversion.

Methods

In this retrospective analysis, all records of laparoscopic cholecystectomy, in patients of age ≥18 years, for symptomatic gallstones, from January 2015 till December 2018 in one of the largest public tertiary care hospitals in Pakistan were included.

Results

The rate of complications associated with laparoscopic cholecystectomy was 6.8%. Older age, obesity, and multiple pre-operative risk factors were associated with complications. The most common intra-operative complication was hemorrhage (1.3%) and most common postoperative complication was surgical site infection (2.7%). Our conversion rate was 3.6%. Both intra-operative and postoperative complications were more common in procedures which were converted to open.

Conclusion

The rate of complication and conversion to open in laparoscopic cholecystectomy is not very high. Older age, obesity, and multi-morbidity was associated with complications. Complicated procedures were more commonly needed to be converted to open.

Factors Affecting Conversion From Laparoscopic Cholecystectomy to Open Cholecystectomy at a Tertiary Care Facility in Saudi Arabia: A Cross-Sectional Study

Background:

Despite the growing importance and increased use of laparoscopy for gallbladder diseases in Saudi Arabia, several factors reportedly result in conversion to open surgery. This leads to increased operative time and increased hospital resource utilization, and, importantly, it impacts patient welfare. Although laparoscopic cholecystectomy and its conversion rates have been investigated in Saudi Arabia, there is little information on the factors associated with this conversion. Therefore, we analyzed the prevalence and factors associated with the conversion from laparoscopic to open cholecystectomy.

Materials and methods:

This was a quantitative, retrospective, observational, cross-sectional study. We reviewed the health care records of all patients who underwent laparoscopic cholecystectomy during the study period (January 2014–December 2015). We analyzed patient demographics, preoperative factors, ultrasound findings, and intraoperative factors associated with higher conversion rates. We calculated means, SDs, and medians for numerical variables and percentages and frequencies for nominal variables. The χ2 and two-tailed t tests were used to compare the categorical and continuous variables, respectively, between patients who underwent laparoscopic cholecystectomy and those who underwent conversion to open cholecystectomy to analyze their relationship with the possibility of conversion. Statistical significance was considered at P &lt; 0.05.

Results:

Age &gt; 40 years, diabetes, history of admission for gallstones, and increased total bilirubin, direct bilirubin, and alkaline phosphatase levels were the preoperative factors and adhesions, bleeding, and stone spillage were the intraoperative factors associated with conversion.

Conclusion:

Recognizing the factors for conversion would improve treatment planning and help predict when conversion may be necessary.

How to perform laparoscopic cholecystectomy safely?

Laparoscopic cholecystectomy (LC) is a successful paradigm for modern minimally invasive surgery. Currently, there are few doctors and even patients who are willing to undergo open cholecystectomy. At the scientific level, LC is safe enough; however, given that the number of patients undergoing LC is large, even a lower incidence of complications can cause an amazing absolute number of patients with complications. The risk factors of LC are numerous, and laparoscopic-related risk factors are the key to deciding surgical indications for LC. In different types of cholecystitis, LC has shown minimally invasive advantages compared with open cholecystectomy. To carry out LC safely, we should emphasize the principle of adherence, attention to details, and timely adjustment. It is necessary to consider the "delayed strategy", which means repeated identification before the key points of surgery, such as vessel or tract identification and disconnection. In the process of tissue dissociation, we must wait for the assistant to adjust in time to avoid misjudgment under the fixed thinking and overlapping vision.