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Types of Exudate From Wounds

by
author image Sharon Takiguchi
Individual expertise lies in the healthcare discipline with over 40 year's front line experience. The attached resume demonstrates in depth expertise in medical/health practice, teaching, research, law and publication. The work settings ranged from private/public hospitals and clinics, insurance companies, private/public colleges to military healthcare settings. Illness prevented publication over the last year, but health status stabilized.
Types of Exudate From Wounds
Bandaged wound on an elbow Photo Credit bdspn/iStock/Getty Images

Overview

Exudate refers to the draining of liquid from open wounds in the human body, reports Medscape.com. This drainage comes from the liquid created by the body as a result of tissue damage. When redressing the wound, the exudate must be checked for proper consistency, odor, quantity and color. The specific types of exudate -- whether they are purulent, seropurulent or sanguinous -- indicates how the wound is progressing and healing.

Serous

Serous wound drainage looks clear or straw colored. This serous material arises from protein and fluid in the tissue. At times, serous material will leak through swollen skin when a person suffers a critical illness. The serous drainage supports the healing process and contains protein, electrolytes, sugar, white cells and some microorganisms. Platelets and fibrin used in the clotting process appear in the fluid in the first 48 to 72 hours of formation of a wound to prevent bleeding. Serous wound fluid occurs as a normal process of healing.

Serosanguinous

Serosanguinous fluid appears pink due to a small number of blood cells mixing with serous drainage. “World Wide Wounds” describe a consistency of thin and watery for serosanguinous fluid. Serosanguinous fluid appears normally in the healing of wounds and is typically a pinkish color due to the yellow liquid combining with small blood droplets.

Sanguinous

Sanguinous liquid means red drainage from trauma to a blood vessel that may occur with the cleaning of a wound or excessive movement of the individual with a wound immediately after a wound emerges. The consistency appears thin and watery with sanguinous fluid. Sanguinous represents an infrequent finding in a wound.

Hemorrhaging

Hemorrhaging indicates a leaking blood vessel putting out blood. The consistency is thicker than sanguinous fluid. This situation may constitute an emergency requiring a physician’s assistance to control bleeding if large amounts of blood flow from the wound site. Hemorrhaging represents an abnormal discovery in a wound.

Purulent

Purulent effluent refers to a thick yellow, gray or green drainage that comes out of a wound when infection invades the area. The fluid contains pathogenic microorganisms along with white cells, inflammatory cells and dead or dying bacteria. When the wound is infected, the volume of the purulent exudate increases.

Cerebral Spinal Fluid

After traumatic accidents, a head or back wound may leak a clear, slightly sticky fluid from the chambers in the head or the canal around the spinal cord. Leakage of cerebral spinal fluid constitutes an emergency. The site of the leaking cerebral wound requires creating a sterile situation to allow the fluid to flow out, but not allow bacteria to enter.

Slough and Necrotic Tissue

In addition to exudates, abnormal tissue may exist in the wound, especially in chronic wounds or wounds with slow healing. Researchers Enoch and Price, writing in 2004 for the journal "World Wide Wounds," define slough as a yellow fibrinous tissue consisting of fibrin, pus and protein material. Necrotic tissue containing dead cells and debris forms in the wound from an inadequate blood supply to the area. The health care provider removes both slough and necrotic tissue in order to allow a wound to heal.

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