Your Penrose Drain: What It Is & How to Heal Well

By Dr. Priya Sammani ( MBBS, DFM )

It’s a common scene in my clinic, or even right after a procedure. You’re looking down at a fresh surgical site. There’s the expected bandage, of course, but then you might notice a little something extra – a soft, flat tube peeking out. It can look a bit odd, maybe even a little worrying at first. “What on earth is that?” is a thought many of my patients have shared. Well, that little tube is often a Penrose drain, and it’s actually there to be your good friend in the healing process. It’s a simple tool, but it plays a big part in helping you recover smoothly.

What Exactly is a Penrose Drain?

So, what is this little helper? A Penrose drain is essentially a soft, flexible rubber tube. Think of it like a very soft, flat straw. After surgery, it’s natural for fluids like blood, lymphatic fluid (lymph) – which is just a normal body fluid that helps fight infection – and other fluids to collect around the area where the surgery happened. If these fluids hang around too long, they can sometimes become a cozy spot for bacteria, leading to an infection.

The Penrose drain has a straightforward job: it creates a pathway for these fluids to move from inside your wound to the outside of your body. This simple action can make a real difference by reducing the risk of infection and helping your wound heal up faster. You might also hear us call it a “straight” or “open” drain. It’s so soft that it compresses gently against your wound, keeping a tiny opening for fluid to escape.

It’s what we call a passive drain. That just means it doesn’t use any suction. Instead, it relies on good old gravity to do the work. Your surgeon will place most of the drain inside the cut they made, leaving a small part sticking out. Often, they’ll put a small suture (a stitch) to keep it in place, or sometimes a little safety pin is attached to the end that’s outside your body, just to make sure it doesn’t slip back in. Gravity then gently pulls the fluid out through the drain. Easy does it.

Why Might I Have a Penrose Drain?

We use a Penrose drain when we want to give your body the best chance to heal without complications like an infection. It’s also handy for helping clear out an infection if one has already started. Believe me, preventing or managing infection is a top priority after any surgery.

So, your surgeon might decide a Penrose drain is a good idea to:

  • Drain an abscess on your skin. An abscess is a pocket of infected pus that needs to be cleared out.
  • Help drain fluids from your abdomen after certain surgeries, like fixing a hernia. You know, when a bit of your insides bulges through a weak spot in your abdominal wall.

Caring for Your Penrose Drain: A Step-by-Step Guide

Alright, let’s talk about looking after this drain. It’s mostly about changing the dressing that covers it. This dressing usually has two parts: a piece of gauze that sits on your skin to soak up any fluid coming out of the drain, and another piece of gauze that covers the drain itself.

Your doctor or nurse will likely ask you to keep a little log. Things like how much fluid the gauze collects (is it a little damp, or quite wet?) and what the fluid looks like – its color, and if there’s any smell. These notes are super helpful because they tell us how you’re healing.

Gathering Your Supplies

Before you start, it’s a good idea to get everything ready, preferably near a sink since handwashing is key. Here’s what you’ll typically need:

  • Two squares of gauze. One for under the drain, one for on top.
  • Two pieces of surgical tape to keep the dressing secure.
  • Clean scissors (these are optional, only if you need to snip the gauze for a better fit around the drain).
  • Non-sterile gloves (the kind we use for most wound care).
  • A washcloth.
  • A clean towel or two.
  • Soap and water, or an alcohol-based hand sanitizer.

Changing the Dressing – Let’s Do It Together

Here’s how we usually guide patients:

  1. Clean your hands really well. Use soap and running water, and scrub for at least 20 seconds. Pat them dry with a clean towel. Quick tip: use that towel to turn off the faucet so your clean hands stay clean. Hand sanitizer works too if soap and water aren’t handy.
  2. Gently take off the old dressing. Peel off the tape and remove the old gauze, being careful not to tug on the drain. Take a peek at the wound and the gauze. How much fluid is there? What’s the color? Any odor? Jot down your observations.
  3. Wash your hands again, then pop on your gloves. Now, gently clean the skin under and around the drain using soap, water, and the washcloth. Rinse the area well and pat it dry with a fresh, clean towel. Sometimes, your surgeon might tell you it’s okay to shower after you’ve taken off the old dressing, letting the soapy water just run over the drain area. Always follow their specific advice.
  4. Apply the new, clean dressing. Slide one piece of clean gauze underneath the drain so it’s flat against your skin. If there’s a safety pin, it should rest on top of this gauze. Then, place the other piece of gauze over the top of the drain and tape it down.

Once you’re done, throw away the used gloves, the old dressing, and the tape. And yup, wash your hands one more time. Can’t be too careful!

How Often and For How Long?

Most people need to change the dressing at least twice a day, but your doctor will give you specific instructions. You’ll also want to change it if it gets loose or feels too wet. Keeping your skin dry is important to prevent irritation and infection.

It often helps to change it around the same times each day and note when you did it.

How long will the Penrose drain stay in? It really depends on your surgery, how big the wound is, and how much fluid is draining. Often, it’s just for a few days. Your provider will let you know when it’s time for it to come out, and you’ll usually need to go back to the clinic for that.

When to Ring Your Doctor

It’s important to know when to give us a call. Definitely reach out if your drain slips or comes loose – we might need to secure it again. And please, contact your doctor or clinic right away if you spot any signs that an infection might be brewing. These include:

  • A fever of 100.4°F (38°C) or higher.
  • Redness, swelling, warmth, or increased pain around the drain site.
  • Red streaks coming from the site.
  • Drainage from the site that’s smelly, turns green, or gets thick. (It’s normal for drainage to start off reddish, then fade to pink, then a pale yellow, and finally clear as you heal.)

And, of course, if you have any questions at all about caring for your drain or if you’re just not sure if your wound is healing as it should, please don’t hesitate to call. That’s what we’re here for.

Penrose Drain vs. Jackson-Pratt (JP) Drain: What’s the Difference?

You might hear about another type of drain called a Jackson-Pratt drain, or JP drain. It also helps get fluid away from a wound, but it works a bit differently. Unlike the Penrose drain (which is passive, remember?), a Jackson-Pratt drain is an active drain. It has a little squeezable bulb that hangs outside your body. When you squeeze the bulb, it creates a gentle suction that helps pull the fluid out of your wound.

The bulb on a JP drain often has markings on it, so you can see exactly how much fluid has drained. So, instead of describing the drainage by how wet the gauze is (like with a Penrose), with a JP drain, you’d be measuring the fluid in cubic centimeters (CCs), milliliters (mLs), or ounces. Just different ways to achieve a similar goal!

Your Penrose Drain: Key Takeaways

Dealing with a Penrose drain can feel a bit daunting, but it’s a very common and helpful part of healing. Here are the main things to remember:

  • A Penrose drain is a soft tube that helps fluid drain from a wound, preventing infection.
  • It works by gravity – no suction involved.
  • Care involves changing the dressing regularly and keeping the area clean.
  • Keep an eye on the drainage (amount, color, smell) and share this with your doctor.
  • Call your doctor if the drain moves, or if you see any signs of infection like fever, increased redness, pain, or smelly/discolored discharge.
  • It’s usually in place for just a few days.

We’ll always discuss all the options and care details specifically for you or your loved one.

You’re not alone in this. We’re here to support you through your recovery. Keep up the good work with your care, and you’ll be on the mend soon!

Dr. Priya Sammani
Medically Reviewed by
MBBS, Postgraduate Diploma in Family Medicine
Dr. Priya Sammani is the founder of Priya.Health and Nirogi Lanka. She is dedicated to preventive medicine, chronic disease management, and making reliable health information accessible for everyone.
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