Mechanisms of development (Pathogenesis)
The development of the disease is based on a pathological cascade triggered by intraductal enzyme activation. This process is divided into two key directions: local tissue damage and systemic impact on the body.
Local damage (autodigestion) Self-digestion of pancreatic tissues occurs:
- When proteolytic enzymes are activated, blood vessels and surrounding tissues are rapidly destroyed. This leads to severe hemorrhagic pancreatitis.
- Activation of lipolytic agents (specifically lipase and phospholipase A) causes fat saponification. The consequence of this process is the formation of fatty pancreatonecrosis.
Systemic impact (toxemia) Characterized by a massive release of enzymes into the bloodstream and lymphatic bed, resulting in hyperenzymemia. Products of enzymatic protein and lipid breakdown spread throughout the body, provoking systemic intoxication. This leads to parenchymal organ damage and severe central nervous system dysfunction.
In a favorable scenario, protective mechanisms come into play: endogenous pancreatic enzyme inhibitors limit the affected area. In such cases, destruction (necrosis) does not occur, and only reactive inflammation develops — pancreatic edema (so-called edematous form).
Clinical presentation and syndromes
The symptomatology of the disease includes several pronounced syndromes that determine the severity of the patient's condition.
Pain syndrome The pain is sudden and spasmodic in nature. Its intensity varies from moderate to extremely sharp. The pain is localized primarily in the epigastrium and umbilical region, often taking on a girdle character radiating to the back and shoulders. The pain attack can last from a few minutes to several days.
Dyspeptic syndrome Manifests with severe nausea and vomiting. Vomiting can be single or exhausting, indomitable, and recurrent.
Systemic intoxication syndrome and objective status General weakness and febrile fever are observed. The patient's behavior may be unusual: ranging from pronounced motor restlessness to complete immobility. In severe toxemia, consciousness is depressed up to coma.
Specific symptoms on palpation Examination of the abdomen (especially in destructive forms) reveals tenderness and muscular defense in its upper half. Diagnostic markers include:
- Korte's sign: tenderness and resistance of the abdominal wall detected directly in the epigastric region.
- Kacha's sign: presence of an area of pronounced cutaneous hyperesthesia along the left hypochondrium.
- Mayo-Robson's sign: acute tenderness on deep palpation in the left costovertebral angle.
When a secondary infection joins, a formidable complication develops — purulent pancreatitis, proceeding as a severe purulent-septic condition.
Diagnostic methods
The diagnosis is established based on a comprehensive assessment of laboratory parameters and instrumental study data.
Laboratory markers:
- Specific: significant increase in amylase activity in both blood and urine.
- Non-specific: classical markers of the inflammatory process, such as neutrophilic leukocytosis and accelerated erythrocyte sedimentation rate (ESR).
Instrumental methods:
- Ultrasound of the pancreas — for initial assessment of organ size and structure.
- Computed tomography (CT) — for detailed visualization of the parenchyma and surrounding tissues.
- Diagnostic laparoscopy — used for direct visual assessment of inflammatory effusion and precise localization of necrosis foci.
Principles of treatment
Therapeutic tactics depend on the form and severity of the disease. A basic requirement for all patients is strict bed rest.
- Treatment of the mild (edematous) form: conservative therapy is used, including painkillers and antispasmodics to relieve symptoms.
- Pharmacotherapy of severe forms: aimed at suppressing pancreatic autoaggression. For this purpose, proteolytic enzyme inhibitors are administered (e.g., aprotinin, octreotide).
- Nutritional tactics: in a severe condition, the patient is completely transferred to parenteral nutrition. Transition to enteral nutrition (per os) is carried out extremely gradually and cautiously.
- Surgical intervention: is the main and life-saving method of treatment in the development of necrotizing inflammation (pancreatonecrosis).
Long-term consequences: after an experienced attack, specific complications can form — pancreatic fistulas and pseudocysts. In addition, a long-standing process can lead to chronization with a phase-progressive course, diffuse degenerative changes, and the replacement of normal glandular tissue with scar and fibrous tissue.
For quick memorization of author-named palpation signs, use association with regions: Korte — epigastrium, Kacha — left hypochondrium, Mayo-Robson — left posterior angle (costovertebral).
Class and exam questions
What is the difference in the pathogenesis of hemorrhagic and fatty pancreatonecrosis?
Hemorrhagic pancreatitis develops due to the destruction of blood vessels by proteolytic enzymes. Fatty pancreatonecrosis occurs upon activation of lipolytic enzymes (lipase), which cause fat saponification.
What is the toxemia syndrome in pancreatitis?
Toxemia arises due to the release of enzymes into the blood and lymph. Protein and lipid breakdown products cause systemic intoxication, affect other internal organs, and can lead to CNS depression up to coma.
What are the nutritional specifics in severe forms of the disease?
In severe condition, exclusively parenteral nutrition (intravenously) is prescribed. The transition to normal nutrition (per os) is carried out very gradually as inflammation subsides.
When is surgical treatment indicated?
Surgical intervention becomes the main method of treatment in the development of necrotizing pancreatitis (pancreatonecrosis).
What else to study on this topic
- Mechanisms of formation of pancreatic fistulas and pseudocysts.
- Features of the transition of the acute process to chronic pancreatitis (K86.1).
- Specifics of pharmacokinetics of proteolytic enzyme inhibitors (aprotinin, octreotide).
- Interpretation of diagnostic laparoscopy results in assessing effusion.
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