Suture Handling, Wound Classes and Specimens

This is Unit Twenty-Four of Tech in Surgery Prep. Unit Twenty-Three ended with pads counted aloud during a crisis. This unit turns to two things that follow the patient long after the case: the wound's class, and the specimens sent to the laboratory. Carry one idea through this lecture. A specimen is often the reason for the operation, and a lost or mislabelled one may not be replaceable. So the rule is one specimen, one container, labelled and passed before the next arrives. A worked example near the end shows that rule with four specimens in one case. By the end you will be able to pass a loaded needle holder and explain wound class. To classify wounds into four classes. To say what the evidence supports for several prevention measures. And to handle and label specimens without a mix-up.

Two entries: passing a loaded needle holder, and why wounds are classified at all.

Ready to suture.

TSC 576 Passing a Loaded Needle Holder

A loaded needle holder is passed so the surgeon can start suturing at once, with the needle already seated: at a right angle in the jaws, a third of the way back from the swage, passed by the team's sharps method. Keep the suture's free end on the sterile field as you pass.

Why wounds are classed.

TSC 577 Why Wound Class Matters

Surgical wounds are classed by how contaminated they are likely to be, and the class reflects infection risk. Higher classes mean microbes are more likely present, and in dirty wounds they were there before the operation. The class guides decisions such as preventive antibiotics, which the surgical team makes.

Four entries on the four wound classes, as the WHO guideline presents the CDC classification.

Four classes in order.

TSC 579 Wound Classification

The four classes rise in risk. Clean wounds are uninfected and uninflamed, and do not enter the respiratory, digestive, genital or urinary tracts. Clean-contaminated wounds enter one of those tracts under control, such as biliary or appendix surgery, without infection or a major break. Contaminated wounds include fresh accidental wounds, a major break in technique, gross spillage from the gut, or acute non-purulent inflammation. Dirty or infected wounds include old traumatic wounds with dead tissue, existing infection or a perforated organ. A major break can move a wound into a higher class, which is one more reason breaks are reported.

The lowest-risk class.

TSC 580 Clean Wounds

A clean wound is uninfected, uninflamed, and enters none of the respiratory, digestive, genital or urinary tracts. It is usually closed primarily, with closed drainage if drained; a planned hernia repair is typical. It is the lowest-risk class, but a break can still introduce infection.

A tract entered under control.

TSC 581 Clean-Contaminated Wounds

A clean-contaminated wound enters the respiratory, digestive, genital or urinary tract under control, without unusual contamination. Biliary, appendix, vaginal and throat operations belong here, provided there is no infection or major break. Entering the gut brings its bacteria in, even when everything goes to plan.

The highest-risk classes.

TSC 582 Contaminated and Dirty Wounds

Contaminated and dirty wounds carry the highest risk. Contaminated includes fresh accidental wounds, major breaks and gross spillage from the gut; dirty includes old traumatic wounds and existing infection or a perforated organ. In dirty wounds, the organisms that may cause infection are present before surgery begins.

Seven entries on prevention measures and specimen handling, and on what the WHO guideline does and does not support.

Changing before closing.

TSC 583 Changing Gloves and Instruments: What the Evidence Says

Many teams change gloves and instruments before closing a contaminated wound, and the WHO guideline is candid about the evidence. It found too little evidence to recommend for or against changing gloves during an operation, or double gloving, to prevent infection. It found no studies comparing fresh closing instruments with used ones, though it calls the practice common and logical, especially after bowel surgery. It is firm that gloves are single-use, never decontaminated. Policy and the surgeon decide, and absence of evidence is not evidence of harm, so the scrub person prepares a closing set without debate.

Single-use gloves.

TSC 584 Gloves Are Never Cleaned for Reuse

Sterile surgical gloves are single-use and never cleaned with alcohol or anything else for reuse. The WHO guideline says glove decontamination should never be performed, and the nursing texts add that washed gloves cannot be relied on to stay intact. A contaminated glove is replaced, never wiped.

From field to laboratory.

TSC 585 Handling Specimens

Specimens are tissue or other material removed for examination, managed by the scrub person while on the field. When the surgeon removes one, the scrub person receives it into a container or basin without losing or confusing it. It stays on the field only as long as needed, then passes to the circulating nurse. Its container carries the patient's name and a description, and the circulator processes it as the laboratory requires. At the end, labels are read aloud. A specimen is often the reason for the operation, and a lost or mislabelled one may not be replaceable.

Lining the incision.

TSC 586 Wound Protectors

A wound protector is a device that lines the edges of an incision during surgery. The WHO guideline suggests considering one in clean-contaminated, contaminated and dirty abdominal operations to reduce infection. Whether to use one is the surgeon's decision, guided by facility practice.

Rinsing the incision.

TSC 587 Incisional Wound Irrigation

Some surgeons irrigate the incision before closing, and the WHO guideline suggests considering an aqueous povidone-iodine solution, and suggests that antibiotic solutions should not be used for incisional irrigation to prevent infection. The surgeon and protocol decide; the scrub person prepares and labels what is chosen.

Growing what is there.

TSC 588 Cultures

A culture is a sample taken to grow and identify microbes, so the right treatment can be chosen. It is collected with sterile technique, so only microbes from the site are captured, not from hands or surroundings. Culture containers are labelled and handed off promptly, like any specimen.

Sutures with a coating.

TSC 589 Antimicrobial-Coated Sutures

Some sutures carry an antimicrobial coating meant to lower infection risk. The WHO guideline suggests triclosan-coated sutures for any type of surgery, and the suture chapter also describes antibacterial coatings. The surgeon still chooses the suture for the tissue; the coating is an addition, not a substitute.

Two entries on labelling specimens and reporting errors, then two worked examples. The opening idea is paid off at the first.

The error-prone step.

TSC 590 Labeling and Passing Off Specimens

Specimen labelling is among the most error-prone steps in surgery, so it follows a fixed routine. The container is labelled before or as the specimen goes in, never later from memory. The label carries the patient's name and a description, with site and side where relevant. Orienting marks, such as stitches marking edges, are noted. The scrub person passes it to the circulator, saying what it is, and at the end each label is read aloud. With several specimens the risk multiplies, so each is labelled and passed one at a time.

When a specimen goes wrong.

TSC 593 Specimen Errors

Specimen errors, such as a lost specimen, a wrong label or a mix-up, can mean a wrong diagnosis or a repeat procedure. When one is found, it is reported at once to the surgeon and through the incident system. A near miss with a specimen is reported too, so the process can improve.

Four specimens, no mix-up.

TSC 596 Three Specimens From One Case

A worked example, constructed for this course, pays off the opening idea. In a breast cancer operation, the surgeon removes a tumor, two lymph nodes from higher and lower in the armpit, and takes a culture swab. Lee, the scrub person, has four containers ready, each labelled with the patient's name. The surgeon places marking stitches on the tumor's edges and explains them; Lee writes the orientation on the label and passes it off, saying what it is. Each node goes into its own container, labelled with its location before the next is accepted. Nothing sits in an unlabelled cup. At the end, each label is read aloud and confirmed. One specimen, one container, labelled and passed before the next.

A class that changes mid-case.

TSC 597 A Case That Changed Wound Class

A worked example, constructed for this course, follows a gallbladder removal that begins clean-contaminated. The gallbladder tears, spilling bile and stones into the abdomen. The surgeon suctions the spill and retrieves the stones, and the circulator notes the event, because gross spillage can raise the class. The surgeon asks for a fresh closing set and a glove change, as the facility's practice is for contaminated cases. Avery has the closing set ready because policy anticipates the request, sets the used instruments apart, and changes gloves. At closure the counts proceed as usual, and the recovery report includes the spillage. Wound class can change during a case, and the change is reported so the patient is watched more closely.

Look at what you can now do. You can pass a loaded needle holder ready to use, and explain why wound class reflects infection risk. You can classify wounds as clean, clean-contaminated, contaminated or dirty, and explain how a break can raise the class. You can say what the WHO guideline supports, and does not, for glove and instrument changes, single-use gloves, wound protectors, irrigation and coated sutures. And you can handle, label and pass off specimens one at a time, collect cultures, and report errors and near misses. Unit Twenty-Five turns to open and minimally invasive surgery.