Drainage System – Function, Types & Uses
A drainage system is a medical device used to remove fluids, blood, pus, or gases from body cavities or wounds following surgery or during the treatment of various medical conditions.
Things worth knowing about "Drainage System"
A drainage system is a medical device used to remove fluids, blood, pus, or gases from body cavities or wounds following surgery or during the treatment of various medical conditions.
What Is a Drainage System?
A drainage system is a medical device designed to remove fluids, blood, pus, or gases from body cavities, wounds, or organs in a controlled manner. It is widely used in surgery and across multiple medical specialties to prevent postoperative complications, treat infections, and support diagnostic assessment.
Types of Drainage Systems
Several types of drainage systems exist, each suited to specific medical indications:
- Active drains (suction drains): These use negative pressure (vacuum) to actively remove fluids. Examples include the Redon drain and the Jackson-Pratt drain.
- Passive drains: These rely on gravity or natural pressure differences within the body. The Penrose drain is a common example.
- Chest drains (thoracic drains): Used in cases of pleural effusion, pneumothorax, or following thoracic surgery to remove air or fluid from the chest cavity.
- Abscess drains: Used to drain pus from abscesses, placed either percutaneously (through the skin) or surgically.
- Biliary drains: Applied in biliary tract disease or after liver surgery to divert bile.
- Ventricular drains: Neurosurgically placed systems to drain cerebrospinal fluid in cases of elevated intracranial pressure.
Indications
Drainage systems are used across a wide range of clinical situations, including:
- Post-surgical use to prevent fluid or blood accumulation (hematomas, seromas)
- Infections such as abscesses or empyemas
- Pleural effusion or pneumothorax
- Biliary obstruction requiring bile diversion
- Management of intracranial pressure
- Peritonitis or abdominal surgeries
Structure and Function
A typical drainage system consists of several key components:
- Drainage tube or catheter: Inserted into the affected body area to channel fluid away from the site.
- Collection container: Collects the drained fluid, allowing monitoring of its volume and appearance.
- Connecting system: Tubing and connectors linking the drainage tube to the collection container.
- Valves or locks: Prevent backflow of fluid into the body (e.g., the Heimlich valve used in chest drains).
Care and Monitoring
Proper management of a drainage system is essential to ensure treatment success and avoid complications. Key aspects include:
- Regular monitoring of drainage volume and color
- Sterile dressing changes at the insertion site
- Ensuring the drainage system remains patent (unobstructed)
- Accurate documentation of drained fluid volumes
- Observation for signs of infection (redness, swelling, fever)
Possible Complications
As with any medical device, drainage systems carry a risk of complications:
- Local or systemic infections
- Blockage or displacement of the drainage tube
- Tissue injury caused by the drainage tube
- Accidental removal of the drain
- Bleeding at the insertion site
Removal of the Drainage
The decision to remove a drainage system is made by the treating physician based on criteria such as decreasing output volume, the nature of the drained fluid, and the overall clinical condition of the patient. Removal is generally performed under sterile conditions and may take place in either an inpatient or outpatient setting.
References
- Siewert, J. R. & Stein, H. J. (eds.) - Surgery, 9th Edition, Springer Medizin Verlag, Heidelberg (2012)
- Kasper, D. L. et al. - Harrison's Principles of Internal Medicine, 20th Edition, McGraw-Hill Education (2018)
- European Association for Endoscopic Surgery (EAES) - Clinical Guidelines on Drainage in Abdominal Surgery, Surgical Endoscopy (2015)
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