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Splinter

life science Maturity 11-13 Next article →

A splinter, also frequently called a sliver, is a fragment of a larger object. To be classified as a splinter, the object must penetrate the body and remain lodged within the tissue.

Anatomy The Skin - NCI Visuals Online
Anatomy The Skin - NCI Visuals Online

These foreign bodies are significant because they can cause immediate pain by damaging flesh and muscle. They also carry a risk of infection due to bacteria on the object. If a splinter is not treated, it may lead to more serious medical complications.

The mechanism of injury begins when a sharp object perforates the cutaneous layer, which is the outer layer of the skin.

Anatomy The Skin - NCI Visuals Online
Anatomy The Skin - NCI Visuals Online

Once it passes this layer, the object typically settles in the subcutaneous layer, the tissue beneath the skin. In some instances, the object can penetrate even deeper into the muscle tissue. In very rare cases, a splinter might reach the bone. Some objects, such as hair splinters, can actually migrate through the body. This movement can cause further tissue damage and irritation.

Medical professionals classify these foreign bodies into two distinct groups. The American Academy of Family Physicians divides them into biological and nonbiological splinters. Biological splinters consist of organic material. Examples include bone, teeth, hair, fish spines, and wood.

Sea Urchins enjoying sunbathing
Sea Urchins enjoying sunbathing

Nonbiological splinters are made of inorganic materials. These common types include glass, metal, plastic, aluminum, and pencil graphite. Some exotic examples include sea urchin spines, insect stings, or even grenade shrapnel.

Different materials present unique challenges during medical treatment. Wood splinters are often associated with inflammation and higher infection risks. Larger wood fragments can be difficult to locate within the tissue. Glass splinters can cause very acute pain in the skin. While glass is often radiopaque, meaning it shows up on X-rays, doctors struggle to see fragments smaller than 2 mm. Metallic objects range from small BB pellets to large shrapnel. If metal is located near vital organs, doctors may decide it is safer to leave it in place.

Certain objects require very specific removal methods. Fishhooks are problematic because they feature barbs designed to stay in place. Improper removal can tear skin and muscle. To fix this, doctors may use the string technique. They loop a string around the hook base and apply downward pressure to unhook the barb. For more difficult cases, doctors use elliptical excision. In this technique, they cut an oval shape around the splinter. They then remove the tissue in the shape of an inverted cone to extract the object.

Detecting a hidden splinter often requires advanced medical imaging. If manual detection fails, doctors use projectional radiography, or X-rays. This method can locate metal, glass, teeth, and some wood like cactus thorns. Medical ultrasonography is another vital tool. It is highly effective for finding small wooden splinters between 1 and 4 mm that are far from bones.

ForeignBody Ultras 1
ForeignBody Ultras 1

For splinters located near bones, doctors may use a CT scan or magnetic resonance imaging for higher sensitivity.

Infection is a major concern, occurring in 1.1 to 12 percent of cases. The risk increases if the object is dirty, poisonous, or causes a deep wound. Certain people, such as those with diabetes or older patients, face higher risks. While antibiotics are not always necessary, untreated wounds can lead to rare but severe diseases like tetanus. In 1993, a woman in Ohio developed tetanus from a wood splinter lodged in her chin for one week. She required intensive treatment, including intravenous clindamycin, but unfortunately passed away 15 days later.

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File:Sea Urchins enjoying sunbathing.jpg
Sea Urchins enjoying sunbathing.jpg
File:Anatomy The Skin - NCI Visuals Online.jpg
Anatomy The Skin - NCI Visuals Online.jpg
File:ForeignBody Ultras 1.png
ForeignBody Ultras 1.png
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