The Pitt — Episode 2, The Trauma Bay
"[Dr. Collins] BP 84 over 58. Um, push dose epi, 0.1 milligram. Foley for urine, stabilize for CT, and throw a wide net." — Trauma TeamDuring the chaotic resuscitation of a severe trauma patient, every drop of fluid that enters or exits the body tells a story about the state of the internal organs. In Episode 2 of The Pitt, Dr. Collins is treating a young man who crashed a scooter and is in profound hemorrhagic shock. Immediately after ordering vasopressors to stabilize the blood pressure, he orders the placement of a "Foley for urine." To the casual viewer, inserting a urinary catheter into a patient who is bleeding internally might seem like a minor detail or an unnecessary step. However, in emergency and trauma medicine, urine output is often called "the window to the kidneys" and is one of the most reliable indicators of successful resuscitation. If the kidneys are producing urine, it means the heart is pumping enough blood to perfuse them.
What is Foley Catheter Placement?
Foley catheter placement (also known as an indwelling urinary catheter) is a common medical procedure in which a hollow, flexible tube made of silicone or latex is inserted through the urethra and into the urinary bladder. The device was named after its inventor, surgeon Frederic Foley, who designed it in the 1930s. The brilliance of Foley's design lies at the end of the tube that sits inside the bladder. It features a small, inflatable balloon. Once the catheter is passed through the urethra and enters the bladder, the doctor or nurse inflates this balloon with sterile water (usually 10 mL). The balloon acts as a physical anchor, preventing the tube from slipping out of the bladder. The other end of the tube is connected to a graduated collection bag, allowing for continuous drainage and precise measurement of urine.Why is the Foley Catheter Vital in Trauma?
In an emergency scenario like the one shown in The Pitt, placing a Foley catheter serves several critical purposes, extending far beyond simple patient comfort:1. Monitoring Fluid Resuscitation (The Shock Indicator)
When a patient is in shock (like the Hemorrhagic Shock of the scooter patient), the body goes into survival mode. It shunts blood away from non-essential organs (like the skin and GI tract) and the kidneys to protect the brain and heart. When the kidneys lose blood flow, they stop producing urine. By placing a Foley catheter and measuring the urine hour by hour, doctors can assess whether their treatments (like Normal Saline and blood transfusions) are working. The goal in adult trauma resuscitation is typically a urine output of 0.5 mL/kg/hour (about 30 to 50 mL per hour). If the urine starts flowing again, the shock is being reversed.2. Bladder Decompression
A full bladder can hold up to a liter of urine. In trauma patients who require emergency abdominal surgery, a distended bladder blocks the surgeon's view and carries a high risk of being accidentally punctured by the scalpel. Draining the bladder with a Foley empties it, moving it out of the way.3. Assessing Urinary Tract Injury
If a patient has suffered severe pelvic trauma, the urinary tract itself may be damaged. If the nurse inserts the Foley and drains pure blood (gross hematuria) instead of yellow urine, it is an immediate sign that the kidneys, ureters, or the bladder itself were injured in the crash.How is the Procedure Performed?
Foley catheter insertion is a strictly sterile procedure. The urinary tract is normally a sterile environment, and introducing bacteria during catheterization is the leading cause of Catheter-Associated Urinary Tract Infections (CAUTI). 1. Preparation and Positioning: The patient is positioned on their back with legs spread. The healthcare provider dons sterile gloves and creates a sterile field using surgical drapes. 2. Cleansing: The area around the urethral meatus (the opening of the urethra) is carefully cleaned with an antiseptic solution, often povidone-iodine or chlorhexidine. 3. Lubrication and Anesthesia: The catheter itself is coated with a lubricating jelly. In many modern hospitals, a syringe of lidocaine jelly (a local anesthetic) is injected directly into the urethra to numb the area and facilitate the tube's passage. 4. Insertion: The tube is gently pushed through the urethra. In men, the tube must pass through the prostate before entering the bladder, which can offer some resistance. 5. Confirmation: The provider knows the catheter is in the correct place when urine begins to flow through the tube (the urine "flash"). 6. Securing: The retention balloon is inflated with sterile water. The tube is then slightly pulled back until the balloon rests against the neck of the bladder, sealing the exit. The catheter is often secured to the patient's thigh with an adhesive device to prevent accidental pulling.Contraindications: When NOT to Place a Foley
Despite its utility, there are times when placing a Foley catheter blindly is strictly prohibited in trauma. Dr. Collins and his team must first look for signs of urethral injury. If the urethra (the tube leading from the bladder out of the body) is torn by the scooter crash, pushing a catheter through it can turn a partial tear into a complete rupture. Doctors are taught not to place a Foley if they observe: - Blood at the urethral meatus. - Perineal or scrotal hematoma (often described as a butterfly-shaped bruise). - A "high-riding" or non-palpable prostate during a rectal exam (indicating the urethra was sheared off and the prostate floated upward). If these signs are present, the team must first perform a radiological procedure called a Retrograde Urethrogram (injecting dye into the urethra and taking an X-ray) to confirm the pathway is intact.Risks and Complications
- Infection (CAUTI): The most common long-term risk. The catheter provides a direct highway for bacteria to enter the bladder. This is why hospitals have strict protocols to remove catheters as soon as possible. - Urethral Trauma: Forceful insertion can create false passages or scars (strictures) in the urethra. - Bladder Spasms: The presence of the balloon can irritate the bladder, causing painful cramps and urine leakage around the tube.
Frequently Asked Questions (FAQ)
Does inserting a Foley catheter hurt?
Yes, it can be uncomfortable and cause a sharp burning sensation or the sudden urge to urinate during insertion. However, using lidocaine lubricating jelly significantly reduces the pain. In severe trauma patients (like in the episode), they are often already receiving heavy pain medications or are unconscious, so they do not feel the procedure.How long can a Foley catheter stay in place?
It depends on the material and medical need. Standard latex catheters are usually changed every 2-4 weeks. 100% silicone catheters can remain for up to 12 weeks. However, in the trauma setting, the goal is to remove it as soon as the patient is stable (often within 24 to 48 hours) to reduce infection risk.What happens if the balloon won't deflate upon removal?
Rarely, the valve controlling the balloon can fail. In these cases, a urologist may need to use a special guidewire to puncture the balloon or, in extreme cases, use ultrasound to guide a needle through the abdomen to pop the balloon.Conclusion
Dr. Collins's rapid order for a "Foley for urine" in Episode 2 of The Pitt highlights a fundamental pillar of trauma management. While blood and blood pressure dominate immediate attention, the kidneys tell the true story of how well the body is surviving shock. The Foley catheter, a nearly century-old invention, remains an indispensable tool for decoding this story, allowing the medical team to adjust their treatments in real-time and save the patient's life.This content is for educational and informational purposes only. It does not replace professional medical advice, diagnosis, or treatment. In case of a medical emergency, call 911/EMS immediately or go to the nearest emergency room.
References: [1] American College of Surgeons: Advanced Trauma Life Support (ATLS) [2] Centers for Disease Control and Prevention (CDC): Catheter-Associated Urinary Tract Infections (CAUTI) [3] UpToDate: Placement and management of urinary bladder catheters in adults [4] StatPearls: Urinary Catheters
