[LAB] Routine Stool Examination Flashcards
(98 cards)
BRIGHT RED STOOL IS INDICATIVE OF WHAT
LOWER GIT BLEEDING
BEETS
TOMATOES
FOOD COLORING
USE OF FOBT
SUSPECTED CASES OF GASTROINTESTINAL DISEASES
FOBT IS USED AS A SCREENING PROCEDURE OF
COLORECTAL CANCER
AMOUND OF BLOOD IN STOOL FOR IT TO BE CONSIDERED AS PATHOLOGICALLY SIGNIFICANT
2.5 ML
150 G
VERY SMALL AMOUNT OF BLOOD THAT IS NOT VISIBLE TO THE NAKED EYE
OCCULT BLOOD
HOW IS OCCULT BLOOD DETECTED
CHEMICAL MEANS ONLY
GENERAL PRINCIPLE OF FOBT
PSEUDOPEROXIDASE ACTIVITY
HEMOGLOBIN DECOMPOSES HYDROGEN PEROXIDE INTO WATER AND OXYGEN
LIBERATED OXYGEN OXIDIZES A CHROMOGEN INTO A COLORED PRODUCT
ORDER OF CHROMOGEN SENSITIVITY
MOST TO LEAST
BENZIDINE
O-TOLUIDINE
GUAIAC
PREFERRED CHROMOGEN FOR FOBT
GUAIAC
WHY IS GUAIAC PREFERRED
DETECTS CLINICALLY SIGNIFICANT AMOUNTS OF BLOOD
DOES NOT REACT TO THE MINIMAL AMOUNT OF BLOOD NORMALLY PRESENT IN A STOOL SAMPLE
EXAMPLE OF A COMMERCIAL KIT FOR OCCULT BLOOD TESTING
HEMASCREEN LAB PACK
EATING THESE 3 DAYS PRIOR TO SPECIMEN COLLECTION CAUSES FALSE POSITIVE RESULTS
RED, RARE MEAT
HORSERADISH, MELONS, CANTALOUPE, RAW BROCOLLI
SUBSTANCES TO AVOID 7 DAYS PRIOR TO SPECIMEN COLLECTION TO PREVENT FALSE POSITIVES
ASPIRIN
NSAIDS
STRONG REDUCING AGENTS THAT CAUSE FALSE NEGATIVE RESULTS
VITAMIN C (>250 mg/day)
IRON SUPPLEMENTS
CAUSES OF FALSE POSITIVES
MENSTRUAL BLOOD
HEMORRHOID CONTAMINATION
RED MEAT
ASPIRIN
NSAIDS
TWO METHODS FOR MICROSCOPIC EXAMINATION
DIRECT FECAL SMEAR
KATO THICK SMEAR
REAGENTS USED IN DFS
NORMAL SALINE SOLUTION
LUGOL’S IODINE
D’ANTONI’S IODINE SOLUTION
BUFFERED METHYLENE BLUE
STORAGE CONTAINER OF D’ANTONI’S IODINE SOLUTION
AMBER
GLASS-STOPPERED OR SCREW CAPPED BOTTLE
ROOM TEMPERATURE
TRUE OR FALSE
LIGHT INFECTIONS CANNOT BE DETECTED IN DFS
TRUE
WHAT KIND OF MOUNT IS USED FOR DETECTING MOTILE TROPHOZOITES
SALINE MOUNTS
WHAT ARE PROTOZOAN CYSTS DEMONSTRATED AS IN DFS
REFRACTILE BODIES
STAINING COLOR OF CYTOPLASM IN DFS
YELLOW
SOLUTIONS STORED IN AMBER BOTTLES
LUGOL’S IODINE
D’ ANTONI’S IODINE SOLUTION
DILUTING RATION IN LUGOL’S IODINE
1:5
LUGOL’S IODINE TO DISTILLED WATER