Suturing and Operation
Today you learn to close a wound. Suturing is muscle memory — nobody is good at it the first time, and everybody gets better fast. By the end of this session your hands will know how to place a stitch.
You are about to handle real surgical needles. A few habits keep the whole table safe:
- Point the needle away from yourself and your partner. When it is not in your hand, rest it in the foam pad.
- Pass instruments calmly, handle first. No reaching across someone's hands.
- Gloves on for all pad work.
- We practice on pads only, never on skin.
- Finished with a needle? It goes in the sharps container at the front.
A new patient just came into the ER. You are the team closing this wound.
Summer job in a restaurant kitchen. Alex slipped carrying a tray and caught a forearm on the metal edge of a prep table. The cut is clean but deep — about 4 cm, deep enough to see the fatty layer underneath. Pressure has slowed the bleeding. It happened 40 minutes ago.
- Why does a wound have a time window before you can safely stitch it closed?
- What would you ask Alex before you close it? (How, when, and health history.)
- Besides stitches, what else does Alex need?
The simple interrupted suture — individual stitches that each stand on their own — is the global standard for closing a wound. Learn the tools, warm up your hands, then practice on the wound pad.
A surgeon never works alone. Instruments are passed handle first, one at a time, so no one is surprised by a sharp point. Everything is counted before the first cut and again before closing, so nothing is left inside a patient. The team pauses for a "timeout" to agree on the patient and the plan before starting. You will use the same habits at your table today.
These grips are not about style. They are about control.
- Needle driver: hold like a pen, or palm it with thumb and ring finger in the rings. Clamp the needle about two-thirds back from the tip.
- Tissue forceps: hold like a pencil to steady the skin edge. They are tweezers, not pliers.
- Suture scissors: for trimming thread, nothing else.
- Hemostat: a locking clamp that holds things in place.
Surgery is a fine-motor skill — wake up your hands first. Using only your needle driver and forceps (no fingers), move ten small objects from one cup to another. Time your group, then run it again and beat your time. Notice how much steadier your second round is.
The silicone pad pushes back like real tissue. Place 3 simple interrupted sutures on the pre-cut wound:
- Enter at 90 degrees, straight down into one edge.
- Follow the curve of the needle through both edges in one smooth motion.
- Pull until the edges just meet — do not bunch them.
Aim for even spacing (about 5 mm apart) and even tension: the edges should meet without the skin blanching white.
This is the hardest part, and the most satisfying once it clicks. Each stitch is locked with a square knot:
- First throw: wrap the long thread around the needle driver counterclockwise, grab the short tail, pull through.
- Second throw: wrap clockwise, grab the tail, pull through. That reversal is what makes the knot hold. Repeat until your hands do it without thinking.
Simple interrupted ties a separate knot for every stitch. A continuous (running) stitch uses one long thread for the whole wound: tie once at the top, sew a series of even passes, and tie once at the end. It is how surgeons close a long wound fast.
Watch it done at speed:
The trade-off: continuous is faster, but if the thread breaks at one point the whole line can loosen. Interrupted is slower, but each stitch stands alone. Surgeons choose based on the wound. Try a continuous line on your pad once your interrupted stitches look clean.
Surgeons get hired for one thing above all: steady hands under pressure — the exact skill you are building with the needle. There are 4 Operation games, so your group gets called to compete while everyone else keeps suturing. Don't sit idle waiting; more reps make steadier hands.
- You get 90 seconds to remove as many pieces as you can with the tweezers.
- Every buzz (touching the metal edge) is a penalty — steady beats fast.
- Score is clean removals minus buzzes. Ties break by fewest buzzes.
- Top scorers across the 4 games advance to a final head-to-head for champion.
Brace your elbow on the table, breathe out as you lift, and slow down on the tight pieces. Same trick a surgeon uses — control your breathing, control your hands.
Score your best three stitches, 1 to 5. Be honest — this is for your own improvement.
- Spacing: even, about 5 mm apart.
- Depth: consistent from stitch to stitch.
- Tension: edges meet, skin not pinched white.
- Knot: flat and secure, does not slip.
Surgeons in training place over 10,000 practice stitches before they ever close a real patient. Like a musical instrument, you cannot read your way to it — you have to do it.
Now make the plan for Alex. Rule of thumb: about one stitch per 5 mm of wound length.
- Suture size: __________ (hint: 4-0 nylon for a forearm)
- Number of stitches for a 4 cm wound: __________
- Tetanus booster needed? Yes / No (dirty metal edge — when was Alex's last one?)
- Return to remove stitches in: __________ days (a forearm heals in about 7 to 10)
- Aftercare: keep it clean and dry for 24 hours, then watch for redness, swelling, or discharge.
Here is how Alex's visit ended:
The wound was cleaned and closed with 8 stitches of 4-0 nylon. Alex's tetanus shot was out of date, so they got a booster. Home the same day with aftercare instructions, back in 7 to 10 days to have the stitches removed. Full recovery expected — with a small scar to tell the story.
- How did your stitches change from your first to your last?
- Which was harder — placing the stitch or tying the knot? Why?
- Where else in the world do you think people use these exact skills?
🔎 Career exploration, at your table. A lot of people close wounds for a living, and it is not only surgeons. Read the cards together, then with your partner:
- Pick the two that surprise you or that you'd want to learn more about.
- Talk it out: why those two? Which could you start fastest? What's one step you could take while you're still in high school?
- Share back: tell the class one career and one thing about it that surprised you.
Today's tie: sets up the instruments and hands them to the surgeon — exactly the tools you just used.
First step: a California community college Surgical Technology program. Pay: ~$55K–$70K.
Today's tie: every instrument you touched was cleaned and sterilized by someone in this job. No sterile tools, no surgery.
First step: a community college central-service / sterile processing course. Pay: ~$45K–$55K.
Today's tie: runs the room, counts every sharp and sponge, and keeps the patient safe during surgery.
First step: a community college or CSU nursing program, then specialize in the OR. Pay: ~$90K–$130K in CA.
Today's tie: the person actually placing the stitches. A surgical PA often does the closing while the surgeon starts the next case.
First step: a bachelor's, then a PA program or medical school (like a UC medical school). Pay: PA ~$120K, Surgeon $300K+.
Today's tie: vets suture every day, from farm animals to family pets. Same knots, different patients.
First step: UC Davis runs one of the country's top veterinary schools. Pay: ~$100K–$130K.
Today's tie: skin doctors remove growths and close the skin constantly. Suturing is a core part of the job.
First step: a bachelor's, then medical school (like a UC medical school), then a dermatology residency. Pay: $300K+.
You closed a wound with real instruments and proved your hands under pressure. Keep practicing, future doc — this one's yours for life.