Risk Factors of Difficult Cholecystectomy and Frequency of Conversion from Laparoscopic to Open Cholecystectomy

Laparoscopic cholecystectomy is one of the most commonly performed surgeries for gallbladder disease around the world [1,2]. It is considered the standard treatment for symptomatic gallstones and acute cholecystitis because it is less invasive than open surgery [3]. Laparoscopic surgery usually causes less pain, smaller scars, less time in hospital and quicker recovery [4]. For these reasons, laparoscopic cholecystectomy has become the standard approach in many hospitals. Although laparoscopic cholecystectomy is generally considered a safe procedure, some cases become difficult during the operation [5]. Difficult cases are characterized by the surgeon’s inability to recognize the anatomy because of severe inflammation, adhesions, bleeding, or abnormal anatomy [6]. These problems can increase the risk of bile duct injury and other complications. Sometimes it is necessary for the surgeon to convert the laparoscopic procedure into an open operation to complete the procedure safely [7]. Conversion from laparoscopic to open cholecystectomy is not seen as a failure but is often performed to protect the patient and avoid serious complications [8]. However, conversion can increase operation time, postoperative pain, length of hospital stay and recovery period [9]. Patients who require open surgery may also have a higher risk of infection and delayed return to normal activities [10].

Many studies have shown that several factors can increase the difficulty of laparoscopic cholecystectomy [11, 12]. Older age is one of the common risk factors because elderly patients often have repeated inflammation and fibrosis around the gallbladder [13]. Male patients are also reported to have more difficult surgeries compared to females in many studies [14]. Obesity can make laparoscopic surgery harder because thick abdominal fat reduces visibility and makes dissection difficult [15].

Repeated attacks of acute cholecystitis can also increase surgical difficulty [16]. Recurrent inflammation may cause severe adhesions around the gallbladder and Calot’s triangle, making it difficult to identify important structures safely [17]. Delayed presentation of acute cholecystitis may further worsen inflammation and increase operative difficulty [18].

Previous abdominal surgery is another important risk factor [19]. Patients who have undergone previous surgery can develop adhesions within the abdominal cavity, which can make access into the abdominal cavity difficult and can increase the chances of injury during laparoscopic procedures [20]. Similarly, patients with diabetes mellitus, liver disease and other chronic illnesses can have more complicated surgeries and delayed healing [21]. Laboratory findings can also help in predicting difficult cholecystectomy. Raised liver enzymes, increased bilirubin levels, and raised alkaline phosphatase can indicate inflammation or obstruction in the biliary system [22]. Imaging findings like thick gallbladder wall, contracted gallbladder, impacted stones and pericholecystic fluid are also associated with difficult laparoscopic surgery [23]. Several Pakistani studies have reported conversion rates from 6% to 10% [6-9]. The most common causes of conversion include severe inflammation, dense adhesions, bleeding, unclear anatomy and gallbladder perforation [24]. Early recognition of high-risk patients can help surgeons plan surgery better and reduce complications.

Proper preoperative assessment is very important in laparoscopic cholecystectomy [25]. Identifying risk factors before surgery can help in patient counseling, operating room planning, and preparation for possible conversion. This study was carried out to identify the risk factors associated with difficult laparoscopic cholecystectomy and the frequency of conversion to open surgery at Ayub Teaching Hospital Abbottabad.

This hospital-based cross-sectional study was conducted in the General Surgical Department of Ayub Teaching Hospital Abbottabad over a period from September 2025 to December 2025. The study included patients undergoing elective laparoscopic cholecystectomy for gallbladder disease.

A total of 111 patients were included in the study using non-probability consecutive sampling. Patients between 16 and 90 years of age of both genders were enrolled after informed written consent. Patients with known gallbladder malignancy and those already planned for open surgery were excluded from the study.

Detailed clinical information was collected using a structured proforma. Age, gender, marital status, education level, employment status, smoking history, physical activity, and chronic medical illnesses were recorded. Clinical history including duration of symptoms, number of previous attacks of cholecystitis, history of previous abdominal surgery, and previous attempts at gallbladder procedures were recorded. Physical examination findings including body mass index (BMI) and ASA score were assessed. Morbid obesity was defined as BMI ≥40 kg/m². Laboratory investigations included liver function tests such as alanine aminotransferase (ALT), aspartate aminotransferase (AST), alkaline phosphatase (ALP), total bilirubin, and gamma-glutamyl transferase (GGT).

Imaging findings of ultrasound, MRCP, MRI or CT scan were also recorded. The findings included thick gallbladder wall, contracted gallbladder, distended gallbladder with impacted stone, gangrenous gallbladder, perforated gallbladder, Mirizzi syndrome, cirrhosis and portal hypertension. All surgeries were performed by experienced surgeons. Intra operative findings such as adhesions, shrunken gallbladder, liver edge puckering, severe inflammation and difficulty in identifying anatomy were recorded. Difficult cholecystectomy was defined as the presence of severe inflammation, non-clear anatomy, bile duct injury, Mirizzi syndrome, scleroatrophic gallbladder, pericholecystic abscess or need for conversion to open surgery.

The collected data were entered and analyzed using SPSS version 22. Frequencies and percentages were calculated for categorical variables. Mean ± standard deviation was calculated for quantitative variables. Chi-square test and Fisher exact test were applied to determine the association between risk factors and difficult cholecystectomy. A p-value less than 0.05 was considered statistically significant.

Ethical approval for the study was obtained from the hospital ethical review committee before the start of data collection. Confidentiality of all patients was maintained throughout the study.

 Older age was also associated with difficult laparoscopic surgery. Elderly patients usually have repeated episodes of gallbladder inflammation over many years. This may lead to dense adhesions and distorted anatomy, making surgery more difficult and increasing the risk of complications.

 Obesity was another important risk factor identified in this study. Obese patients may have thick abdominal walls and excess fat around the gallbladder, which can reduce visibility during surgery and make dissection more difficult. Previous abdominal surgery also increased operative difficulty because adhesions inside the abdomen can make laparoscopic entry and dissection challenging.

 One of the most important findings of this study was the strong association between thick gallbladder wall and difficult surgery. A thick gallbladder wall usually indicates severe or repeated inflammation. Inflammation can make the tissues swollen and difficult to separate safely.

Repeated attacks of cholecystitis were also significantly associated with difficult laparoscopic cholecystectomy. Recurrent inflammation may cause fibrosis and adhesions around Calot’s triangle, making it difficult to identify the cystic duct and artery clearly.

 The conversion rate observed in this study was 8.1%, which is similar to rates reported in previous Pakistani and international studies. Dense adhesions were the most common reason for conversion, followed by severe inflammation and unclear anatomy.

Conversion to open surgery should not be considered a surgical failure. Instead, it is often done to improve patient safety and prevent serious complications such as bile duct injury or uncontrolled bleeding. Early decision-making for conversion can help reduce operative complications.

 The findings of this study highlight the importance of careful preoperative assessment. Identifying high-risk patients before surgery can help surgeons plan better, counsel patients properly, and prepare for possible operative difficulties.

 This study has some limitations. It was conducted in a single hospital with a moderate sample size. Therefore, the findings may not represent all healthcare settings. Despite these limitations, the study provides useful local data regarding risk factors for difficult cholecystectomy and conversion to open surgery.

Difficult laparoscopic cholecystectomy and conversion to open surgery are associated with several important risk factors, including thick gallbladder wall, obesity, previous abdominal surgery, repeated attacks of cholecystitis, and older age. Male patients and patients with severe inflammation were more likely to experience operative difficulty.

The findings of this study show that proper preoperative assessment is very important in patients undergoing laparoscopic cholecystectomy. Early identification of high-risk patients can help improve surgical planning, reduce complications, and improve patient safety. Conversion to open surgery should be considered a safe decision when laparoscopic dissection becomes difficult.

More large-scale studies are needed to further improve prediction models and support better surgical outcomes in patients undergoing laparoscopic cholecystectomy.

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