Drainage in clinical practice involves the removal of fluids, gases, or purulent material from body cavities, wounds, or hollow organs. The primary goal is to prevent fluid accumulation that can lead to infection, delayed healing, or increased pressure on vital structures. Nurses encounter various drainage systems across surgical, medical, and emergency wards, ranging from simple gravity setups to complex low-negative-pressure suction devices.
Clinical indications for inserting a drain include:
Drainage systems are broadly categorized into open and closed configurations, each carrying distinct infection control implications.
Managing specialized tubes requires understanding their anatomical placement and physiological purpose. Gastrointestinal tubes, such as nasogastric (NG) tubes, decompress the stomach by removing gastric secretions and gas, protecting anastomosis sites or relieving bowel obstructions. They rely on intermittent or continuous low suction.
Urinary drainage relies primarily on indwelling urethral catheters, commonly known as Foley catheters. These divert urine from the bladder into a closed collection bag using gravity. Maintaining a strict downward flow without kinks is essential to prevent reflux of urine, which can readily introduce bacteria into the sterile bladder and cause catheter-associated urinary tract infections (CAUTIs).
Regular assessment of both the patient and the drainage apparatus prevents overlooked complications. The nurse must inspect the insertion site for signs of infection, such as erythema, warmth, purulent discharge, or excessive tenderness. The surrounding skin barrier must be protected from maceration caused by leaking fluid.
Drain output documentation requires attention to quantity, color, consistency, and odor. A sudden drop in output does not always mean healing; it frequently indicates a blocked tube or kinked line. Conversely, a sudden surge of bright red blood demands immediate surgical notification, as it can signal active internal hemorrhage.
Effective maintenance keeps drainage systems functioning safely and comfortably. The nurse empties collection reservoirs at designated intervals, measuring output accurately using a graduated cylinder and recording the volume on the fluid balance chart. Aseptic technique is mandatory when handling open ports or changing dressings around insertion sites.
Securing the tubing prevents accidental traction that can dislodge the drain or cause intense pain. Pins or specialized adhesive fasteners anchor the line to the patient's gown, ensuring slack remains for normal movement. Suction bulbs, such as Jackson-Pratts, must be compressed and capped properly after emptying to re-establish the negative pressure gradient required for continuous fluid evacuation.
Drainage complications require swift recognition and systematic troubleshooting. Obstructions caused by blood clots or thick fibrinous debris stop fluid egress, causing painful internal fluid accumulation and localized swelling. If prescribed, gentle milking or stripping of the tubing can help dislodge clots, though this practice must be done cautiously to avoid generating excessive negative pressure that traumatizes delicate tissue.
Dislodgement is another critical event. If a drain slips partially or completely out, the nurse must apply a sterile dressing over the site, place the patient at rest, and notify the physician immediately. Never attempt to re-advance a partially dislodged drain, as this introduces non-sterile skin bacteria directly into deep sterile cavities.
The removal of a drain is a clinical procedure performed when output decreases to minimal levels or the underlying clinical objective is met. The nurse prepares the patient by explaining the procedure, noting that a brief pulling sensation or mild discomfort may occur. Analgesics can be administered 30 minutes prior to removal if ordered.
During removal, the nurse cuts any anchoring sutures, instructs the patient to take a deep breath and hold it (or perform the Valsalva maneuver), and pulls the tube out smoothly and steadily. The Valsalva maneuver increases thoracic and abdominal pressure, preventing air from entering open tracts. A sterile occlusive dressing is applied immediately to seal the wound and encourage rapid closure.