CCHT Water Exam 31 Questions with Verified Answers,100% CORRECT

CCHT Water Exam 31 Questions with Verified Answers What are the two main reason for treating the water used for hemodialysis? - CORRECT ANSWER preventing harm to the patient and preventing damage to the RO system ...

CCHT Water Exam 31 Questions with Verified Answers What are the two main reason for treating the water used for hemodialysis? - CORRECT ANSWER preventing harm to the patient and preventing damage to the RO system List the contaminants in the water that are living creatures? - CORRECT ANSWER Bacteria and viruses What are the usual way that water becomes contaminated? - CORRECT ANSWER The process of acid rain, surface water from lakes, ponds, rivers and reservoris. Define endotoxin - CORRECT ANSWER A part of the bacterial cell walls that can contaminate water used for dialysis What is the function of the water softener in a water treatment system? What principle is responsible for this? - CORRECT ANSWER To remove calcium and magnesium. the water softener works by ion exchanges According to AAMI standard, how often should bacteriological testing of water used for dialysis be done? - CORRECT ANSWER monthly Why is water considered safe for drinking not necessarily safe for hemodialysis? - CORRECT ANSWER Patient are exposed to very large volumes of water during dialysis. What contaminants are removed by the carbon tants? - CORRECT ANSWER Chlorine, chloramines, pesticide, industrial solvents, and some trace organic substances.- The carbon tanks work on the principle of adsorption( attracts and holds low molecular weight particles from the water, much like a magnet attracts and holds iron filings) Exposure to chloramines during hemodialysis may cause? - CORRECT ANSWER Hemolysis List some examples of the water contaminants? - CORRECT ANSWER Minerals, sodium, chlorine, nitrate salts, pesticides, impurities from industry, fertilizers, herbicides, fluoride, chloramines( chlorine and ammonia), trace metals and, Microorganisms. What sign/symptom most commonly occur from bacteria/endotoxin exposure? - CORRECT ANSWER Fever and chills Describe the Reverse Osmosis system - CORRECT ANSWER a membrane separation process for removing solutes from a solution. Feed water is pumped under pressure through the semipermeable membrane which removes most contaminants from the water. the RO membrane can reject 95 to 99% of many substances including bacteria viruses, endotoxin, salts, metals and chemicals What are water quality checks done on the water treatment system? - CORRECT ANSWER At the start of the day, before every shift of patient or every 4 hours ( if you do not have set shift) According to AAMI standards bacteria in dialysis water must not exceed what level? - CORRECT ANSWER 200 CFU/ml What is the action level for bacteria? - CORRECT ANSWER 50 CFU/ml According to AAMI standards endotoxin on dialysis water must not exceed what level? - CORRECT ANSWER 2 EU/ml What is the action level for endotoxin? - CORRECT ANSWER 1 EU/ml How often should the RO operating parameters be checked? - CORRECT ANSWER daily What is the most common way that water treatment systems are disinfected? - CORRECT ANSWER Chemical disinfection What substance is added to municipal drinking water supplies in some localities to make the water clearer? - CORRECT ANSWER Alum WHAT IS THE DEVICE THAT ALLOWED MIXED OF COLD OF HOT WATER AND COLD WATER TO A STANDARD TEMPERATURE OF 77-82 DEGREES WHICH HELPS IMPROVE THE WATER QUALITY? - CORRECT ANSWER Blending valve What is the name of the device that prevents treated water from entering the feed water? - CORRECT ANSWER Backflow prevention device When should the water hardness test be done? - CORRECT ANSWER At the end of the day What material is in the carbon tants that attracts chlorine and chloramines? - CORRECT ANSWER Granular activated charcoal How many carbon tanks in a series must a water treatment system have? - CORRECT ANSWER 2 How much EBCT( empty bed contact time) must the carton tanks have ? - CORRECT ANSWER 10 minutes What should the total chlorine level be after the first carbon tank? - CORRECT ANSWER less than 0.1ppm The reverse osmosis must be running for how long before completion of the test for total chlorine level? - CORRECT ANSWER 15 minutes What is the backup system for the RO? - CORRECT ANSWER Deionization tanks there are usually 2 tanks in a series must have resistivity meter that can be heard and seen in the patient care area What is the purpose of an Ultraviolet light in the water treatment system? - CORRECT ANSWER Destruction of microbes what type of filter must follow in line after the Ultraviolet light? - CORRECT ANSWER Submicron and Ultrafilters