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Exam Review

Key Facts: CCHT Exam

150

Exam Questions

NNCC

95

Passing Standard Score

NNCC

3 hrs

Exam Duration

NNCC

$225

Exam Fee

NNCC

48-52%

Clinical Domain

NNCC Test Specifications

3 years

Certification Validity

NNCC Recertification

The CCHT exam has 150 questions in 3 hours. NNCC requires a standard score of 95, achieved by answering 74% of test questions correctly. Blueprint weights are Clinical 48-52%, Technical 21-25%, Environment 13-17%, and Role Responsibilities 10-14%. CCHT certification is effective for 3 years and must be renewed every 3 years.

Sample CCHT Practice Questions

Try these sample questions to review concepts for the CCHT exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 195+ question experience with AI tutoring.

1A patient arrives for dialysis with a blood pressure of 180/110 mmHg. What is the most appropriate initial action by the hemodialysis technician?
A.Administer an antihypertensive medication as prescribed
B.Continue with patient assessment and monitor blood pressure during dialysis
C.Notify the nurse and delay dialysis until blood pressure is evaluated
D.Begin dialysis immediately to remove fluid and lower blood pressure
Explanation: A blood pressure of 180/110 mmHg is severely hypertensive (Stage 2 hypertension) and requires evaluation before dialysis. The technician should notify the nurse immediately. Dialysis can cause acute blood pressure drops, and starting treatment with severely elevated pressure can be dangerous, potentially causing cerebral hypoperfusion or other complications. Only the nurse or physician can determine if dialysis should proceed, be modified, or if medications are needed first.
2During dialysis, a patient complains of muscle cramping in the legs. What should the technician do first?
A.Tell the patient to endure the discomfort as it is normal
B.Give the patient a saline bolus without consulting the nurse
C.Check the ultrafiltration rate and notify the nurse
D.Immediately stop the dialysis treatment
Explanation: Muscle cramping during dialysis is commonly caused by rapid fluid removal (high ultrafiltration rate) leading to volume depletion and electrolyte shifts. The technician should first check the UF rate and notify the nurse, who may adjust the rate, give saline, or modify treatment parameters. Never give medications or fluids without nurse direction, and stopping treatment is not the first response unless ordered.
3What is the most common cause of intradialytic hypotension?
A.Air entering the venous blood line
B.A high pre-dialysis potassium level
C.A reaction to the dialyzer membrane material
D.Removing fluid faster than plasma can refill
Explanation: Intradialytic hypotension (IDH) most commonly occurs when the ultrafiltration rate exceeds the rate at which fluid can move from the interstitial space back into the vascular compartment (vascular refilling rate). This causes acute hypovolemia and dropping blood pressure. IDH affects 15-30% of dialysis sessions and is defined as a systolic BP drop of ≥20 mmHg or mean arterial pressure drop of ≥10 mmHg with symptoms.
4A patient's pre-dialysis weight is 72 kg, and their dry weight is 68 kg. How much fluid should be removed during this treatment?
A.8 liters
B.2 liters
C.4 liters
D.6 liters
Explanation: The weight difference between pre-dialysis weight (72 kg) and dry weight (68 kg) is 4 kg. Since 1 kg of body weight equals approximately 1 liter of fluid, the ultrafiltration goal should be 4 liters. This represents the estimated excess fluid that accumulated between treatments. The technician must verify this prescription with the RN before proceeding, as other factors may influence the actual UF goal.
5During AV fistula cannulation, what shows the technician that the needle tip has entered the vessel?
A.A flashback of blood into the needle tubing
B.Firm resistance felt as the needle is advanced
C.The skin around the site turning pale
D.A sharp pain reported by the patient
Explanation: A flashback of blood shows the needle is in the access; the cannulator then lowers the angle and advances the needle (BC Renal rope-ladder cannulation guideline). Pain, swelling or discoloration can signal infiltration, and if resistance is felt the needle is pulled back and redirected, so none of these confirms placement.
6A patient on dialysis develops chest pain and shortness of breath. The technician notices the patient is pale and diaphoretic. What is the priority action?
A.Stop dialysis, return blood, and call for emergency help
B.Continue dialysis and increase the ultrafiltration rate
C.Give oxygen, then finish the treatment as scheduled
D.Check blood glucose before doing anything else
Explanation: Chest pain with diaphoresis and pallor during dialysis is a medical emergency requiring immediate action. The technician must stop dialysis, return the patient's blood safely, and call for emergency medical assistance. These symptoms could indicate acute coronary syndrome, severe hypotension, air embolism, or hemolysis - all potentially life-threatening. Only after securing patient safety should other interventions like oxygen be applied.
7What is the recommended angle for needle insertion when cannulating an arteriovenous (AV) fistula?
A.90 degrees (perpendicular)
B.45-60 degrees
C.10-15 degrees
D.25-35 degrees
Explanation: The recommended angle for needle insertion when cannulating an AV fistula is 25-35 degrees. This angle allows adequate needle depth for blood flow while minimizing vessel trauma. The arterial needle is typically inserted first, bevel up, at this angle. A shallower angle may cause infiltration, while a steeper angle increases the risk of vessel wall damage or posterior wall penetration.
8A patient's potassium level is reported as 6.8 mEq/L pre-dialysis. What does this indicate?
A.Slightly elevated potassium that can wait for routine dialysis
B.Hypokalemia requiring potassium supplementation
C.Normal potassium level for dialysis patients
D.Hyperkalemia requiring immediate attention
Explanation: A potassium level of 6.8 mEq/L indicates severe hyperkalemia (normal is 3.5-5.0 mEq/L, with 5.0-5.5 considered mild elevation in ESRD). Levels above 6.0 mEq/L require immediate medical attention due to risk of cardiac arrhythmias, including life-threatening ventricular fibrillation. The nurse and physician must be notified immediately, and emergency dialysis or other interventions may be necessary. ECG monitoring should be initiated.
9Which of the following is a contraindication for using the buttonhole cannulation technique?
A.Patient with diabetes mellitus
B.Presence of aneurysm at cannulation site
C.Patient preference for sharp needles
D.Patient on anticoagulation therapy
Explanation: The presence of an aneurysm at the cannulation site is a contraindication for buttonhole technique. Buttonhole cannulation uses the exact same entry site repeatedly, creating a scarred track. An aneurysm represents a weakened, dilated vessel wall that could rupture with repeated cannulation. Other contraindications include grafts (buttonhole is for fistulas only), poor hygiene, and active infection. Anticoagulation and diabetes are not contraindications.
10During dialysis, the patient's venous pressure alarm sounds. The pressure reading is 250 mmHg. What is the most likely cause?
A.Blood pump speed set lower than prescribed
B.The venous needle slipping out of the access
C.A kink in the arterial line before the pump
D.A clot or obstruction on the venous side
Explanation: An elevated venous pressure (normal is 50-200 mmHg) typically indicates obstruction to venous outflow. Common causes include the venous needle positioned against the vessel wall, a kink in the venous tubing, or clot formation in the venous line or dialyzer. A dislodged venous needle may change the venous pressure very little, so the pressure alarm may not sound at all; that is why needle sites and line connections are kept visible. Arterial line issues affect arterial pressure, not venous. The technician should check needle position and tubing first.

About the CCHT Exam

The CCHT exam validates entry-level clinical hemodialysis technician knowledge across patient care, technical dialysis systems, environmental safety, and role responsibilities. The official blueprint emphasizes application-level decisions in safe hemodialysis care.

Exam sponsor: NNCC (Nephrology Nursing Certification Commission). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Questions

150 questions

Time Limit

3 hours

Passing Score

Standard score 95; about 74% correct per NNCC

Exam / Certification Fees

$225

Exam sponsor website

Reported exam pass rate: 65% (2025). all 2025 CCHT exams (NNCC 2025-2026 Annual Report: 7,091 CCHT exams) This describes exam candidates, not OpenExamPrep users or results from using our resources. Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

48-52%

Clinical

Patient care before, during, and after dialysis; access assessment, cannulation, monitoring, complications, fluid status, and post-treatment care.

21-25%

Technical

Water treatment, dialysate, extracorporeal circuit, machine setup, alarms, troubleshooting, lab processing, and equipment adverse events.

13-17%

Environment

Standard precautions, infection control, environmental disinfection, chemical spills, body mechanics, emergency exits, and safety.

10-14%

Role Responsibilities

Documentation, communication, professional boundaries, privacy, dignity, confidentiality, care-team roles, and treatment-outcome reporting.

Preparing for the CCHT Exam

What You Need to Know

  • Passing score: Standard score 95; about 74% correct per NNCC
  • Exam length: 150 questions
  • Time limit: 3 hours
  • Exam / certification fees: $225 Official sources

Using Our Practice Resources

  • Work through all 195 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

CCHT: Suggested Study Strategy

1Prioritize the Clinical domain because it represents 48-52% of the official blueprint.
2Practice application-level scenarios because 63-67% of the blueprint is application, not simple recall.
3Use the score report by blueprint area after any unsuccessful attempt to target weak domains.
4Review infection control, access safety, machine alarms, water treatment, and role boundaries together because real items often combine safety and scope.
5Read NNCC eligibility and recertification rules directly before applying, scheduling, or planning renewal.

Frequently Asked Questions

How many questions are on the CCHT exam?

The NNCC CCHT exam has 150 questions and must be completed in 3 hours.

What score do I need to pass the CCHT exam?

NNCC requires a standard score of 95 to pass the CCHT exam and states this is achieved by answering 74% of the test questions correctly.

What are the CCHT eligibility requirements?

Applicants need a high school diploma or GED/equivalent and completion of a clinical hemodialysis technician training program that includes classroom instruction and supervised clinical experience.

What is the largest CCHT exam domain?

Clinical is the largest domain at 48-52% of the exam, or about 71-78 of the 150 items in the official ideal distribution.

How long is CCHT certification valid?

CCHT certification is effective for 3 years from the last day of the month in which the applicant passed the examination. Certification must be renewed every 3 years.