Week 12: Chp 58: Hemorrhoids Flashcards
What is a hemorrhoid?
swollen or dilated veins in the anorectal area
-they are varicose veins of the rectum
What are hemorrhoids caused by?
caused or precipitated by straining during defecation, prolonged constipation, heavy lifting, prolonged standing and sitting, portal hypertension (as in cirrhosis), increased intra-abdominal pressure, pregnancy, obesity, and heart failure
-most frequently reported by women
Internal Hemorrhoid
lying above the dentate line
-cannot be seen on visual inspection
External Hemorrhoid
lying below the dentate line
What can happen to a hemorrhoid?
can become prolapsed or protrude through the anal canal
-may become thrombosed or clotted
Strangulated hemorrhoid
is trapped by the anal sphincter, compromising blood flow to the vein in the hemorrhoid
Grading System for Internal Hemorrhoids
used according to severity of prolapse and serves as a guide for treatment
- Grade I: the hemorrhoids do not prolapse
- Grade II: the hemorrhoids prolapse on defecation but reduce spontaneously
- Grade III: the hemorrhoids prolapse on defecation and must be reduced manually
- Grade IV: the hemorrhoids are prolapsed and cannot be reduced manually
Clinical Manifestations of Internal hemorrhoids
bleeding is almost always painless and is observed as bleeding during bowel movement
Clinical Manifestations of External Hemorrhoids
itching, irritation, and pain of the rectal area
- pain and pruritus of the rectal area
- bleeding may occur and is usually seen on toilet paper but may also be streaked in the stool
How are external hemorrhoids diagnosed?
visual inspection
How are internal hemorrhoids diagnosed?
digital examination, anoscopy (procedure involving a small, tubular instrument inserted into the anal canal for inspection), and sigmoidoscopy
Treatment of hemorrhoids
usually conservative and involves relief of symptoms and associated pain
-cold packs and sitz baths (warm water baths covering the hips and buttocks) three or four times a day to reduce some swelling and decrease pain
What happens if conservative therapy does not alleviate symptoms within 3 to 5 days?
patient needs to be referred to a primary care provider
- patient is encouraged to consume adequate fluid and fiber intake to decrease constipation associated with hemorrhoids
- stool softeners also recommended
- topical nitroglycerin (0.4%) may be used to decrease pain caused by thrombosed hemorrhoids as well as topical nifedipine
- over-the-counter preparations available in creams and suppositories
Medications used for Treatment of Hemorrhoids
- Local Anesthetics
- Protectants/ Emollients
- Astringents
- Corticosteroids
Local Anesthetics
provide temporary relief from burning, itching, and pain
-Benzocaine, dibucaine, lidocaine
Protectants/ Emollients
form physical barrier on the skin to prevent irritation of the perianal region
-cocoa butter, lanolin, white petroleum, zinc oxide, mineral oil, cod liver oil, or shark liver oil
Astringents
promote skin dryness, which helps relieve itching, irritation, and inflammation
-calamine, zinc oxide, witch hazel
Corticosteroids
reduce inflammation
-hydrocortisone
Surgical Management
not required unless the hemorrhoid is thrombosed
-patients with grade III or IV may require definitive treatment with surgery
>rubber-band ligation
>bipolar, infrared, and laser coagulation
>sclerotherapy
>cryosurgery
>hemorrhoidectomy
Rubber-band Ligation
most widely used technique
- hemorrhoid is identified using an anoscope
- a rubber band is placed around the base of the hemorrhoid, which constricts circulation, causing the hemorrhoid to slough off in 2 to 4 days
Bipolar, infrared, and laser coagulation
uses bipolar current or infrared or laser light, which causes coagulation and necrosis of the hemorrhoid, leaving fibrosis in the submucosal layer
Sclerotherapy
involves injecting a sclerosing agent (an agent that causes formation of scar tissue) directly into the hemorrhoid, which causes an inflammatory reaction leading to the vessel drying up and disintegrating
Cryosurgery
used liquid nitrogen to freeze the hemorrhoid
-procedure usually associated with intense pain and is not first method of choice
Hemorrhoidectomy
excision of the vein
- the area may be left open to heal by secondary intention, or may be closed with sutures
- closing the area with sutures is less painful for the patient but has a higher risk of infection