Heparin to Prevent Organ Failure in Acute Pancreatitis

This randomized controlled clinical trial is conducted to evaluate the clinical efficacy and safety of early, continuous intravenous administration of Unfractionated Heparin (UFH) as an adjunctive treatment to mitigate the development and progression of systemic multi-organ failure in patients presenting with acute pancreatitis.

Clinical Workflow and Protocol:

• Patient Screening and Enrollment:

Patients presenting to the emergency department or the surgical wards with a clinical diagnosis of acute pancreatitis are assessed immediately for eligibility based on pre-established clinical parameters. Acute pancreatitis is diagnosed using standard clinical criteria, requiring at least two of the following: characteristic severe abdominal pain, serum amylase or lipase levels elevated to at least three times the upper limit of normal, or characteristic cross-sectional abdominal imaging findings.

• Baseline Assessments:

Upon securing formal written informed consent, enrolled patients undergo an immediate baseline clinical evaluation. Baseline laboratory parameters-including a complete blood count (CBC), serum electrolytes, renal function tests (serum creatinine and blood urea), liver function tests, serum amylase/lipase, and arterial blood gases (ABGs)-are drawn. Baseline physiological parameters are recorded to calculate initial disease severity and multi-organ function scores.

• Randomization and Group Allocation:

Following baseline verification, patients are randomly allocated in a 1:1 ratio to either the Intervention Group (Group A) or the Control Group (Group B) utilizing a randomized lottery method managed through sequentially numbered, opaque, sealed envelopes to ensure allocation concealment.

• Therapeutic Interventions:

• Control Group (Group B): Patients receive standard institutional supportive medical therapy for acute pancreatitis. This includes aggressive tailored intravenous fluid resuscitation (primarily balanced crystalloids like Ringer's Lactate) titrated to clinical endpoints, standardized analgesia for pain management, close hemodynamic monitoring, and early targeted nutritional support.
• Intervention Group (Group A): Patients receive the identical standard institutional supportive medical therapy protocol provided to the control group. In addition, an active anticoagulant protocol is initiated within the first 24 hours of admission, consisting of Unfractionated Heparin administered via a continuous intravenous infusion pump.
• Safety Monitoring and Titration:

To maximize patient safety and evaluate potential adverse events, patients receiving the intravenous UFH protocol undergo rigorous monitoring. Coagulation profiles, including Activated Partial Thromboplastin Time (aPTT), are checked regularly to guide safe administration. Patients in both groups are carefully monitored daily by the clinical team for any clinical signs of minor or major bleeding complications, such as hematemesis, melena, epistaxis, or an unexplained drop in hemoglobin levels.

• Outcome Evaluation:

All participating patients are evaluated daily throughout their acute hospital stay. The development of systemic complications is tracking objectively using the Modified Marshall Scoring System, which grades respiratory, cardiovascular, and renal organ function daily from admission through Day 14 or until official hospital discharge. Total duration of hospital stay and all-cause clinical outcomes are recorded at the time of discharge.

Inclusion criteria

• Patients aged 18 years or older.
• Confirmed clinical diagnosis of acute pancreatitis based on meeting at least two of the following three revised Atlanta criteria: (1) acute onset of severe, persistent upper abdominal pain; (2) serum amylase or lipase levels elevated to at least three times the upper limit of normal; (3) characteristic findings of acute pancreatitis on cross-sectional abdominal imaging.
• Presentation to the hospital and initiation of the trial protocol within 24 hours of the onset of symptoms.
• Absence of systemic organ failure at the baseline assessment during initial hospital admission.

Exclusion criteria

• Baseline organ failure already present at the time of initial hospital admission (defined as a Modified Marshall Score of 2 or more in any organ system).
• Patients with a known history of chronic pancreatitis or recurrent episodes of pancreatitis.
• History of hypersensitivity, allergy, or known adverse reactions to heparin, low molecular weight heparins, or related anticoagulants.
• Active clinically significant bleeding, recent major hemorrhage, known bleeding diathesis, or severe thrombocytopenia (platelet count less than 100,000/mcL).
• Existing indication for therapeutic systemic anticoagulation (such as active deep vein thrombosis, pulmonary embolism, mechanical heart valves, or atrial fibrillation).
• Pregnant or lactating females.
• Refusal to provide informed consent to participate in the study.