Diagnostic Test Outline

Diagnostic Test Outline

• Explore the tools and procedures used to diagnose and monitor medical conditions (CP, SI, TPS).
• Assess the importance of interpreting diagnostic findings to support treatment options for specific pathologies (DM, SI, CP).
• Format:
  • Multiple choice
  • Vital sign scenarios
  • Diagnostic test scenarios

Essential Diagnostic Tools

Tools to Know

• Sphygmomanometer

  • Measures: Blood pressure (systolic & diastolic)
  • How it works: An inflatable cuff occludes an artery; pressure is released while listening for Korotkoff sounds.
  • Abnormal results indicate:
  • Hypertension: This condition increases the risk of stroke, heart disease, and kidney damage.
  • Hypotension: This can lead to shock, dehydration, or blood loss.

• Stethoscope

  • Measures: Body sounds such as heart, lungs, bowel, and blood flow.
  • How it works: It amplifies internal sounds.
  • Abnormal results indicate:
  • Heart murmurs → valve disorders
  • Crackles → pneumonia, heart failure
  • Wheezing → asthma, COPD

• X-Ray

  • Measures: Bone and dense tissue structure.
  • How it works: Radiation passes through the body; dense tissue absorbs more rays.
  • Abnormal results indicate:
  • Fractures
  • Pneumonia
  • Bowel obstruction
  • Spinal abnormalities (important in CP, SI)

• MRI (Magnetic Resonance Imaging)

  • Measures: Soft tissues, brain, and spinal cord.
  • How it works: Utilizes magnetic fields combined with radio waves.
  • Abnormal results indicate:
  • Brain injury (associated with CP)
  • Spinal cord damage (associated with SI)
  • Tumors or inflammation

• Ultrasound

  • Measures: Soft tissues, organs, and blood flow.
  • How it works: Sound waves reflect off tissues.
  • Abnormal results indicate:
  • Organ enlargement
  • Gallstones
  • Poor blood flow

• PET Scan

  • Measures: Metabolic activity.
  • How it works: Radioactive glucose uptake is assessed.
  • Abnormal results indicate:
  • Cancer
  • Brain metabolism abnormalities

• ECG (Electrocardiogram)

  • Measures: Electrical activity of the heart.
  • How it works: Electrodes detect heart impulses.
  • Abnormal results indicate:
  • Heart attack
  • Arrhythmias
  • Electrolyte imbalance

• EEG (Electroencephalogram)

  • Measures: Brain electrical activity.
  • How it works: Electrodes are placed on the scalp.
  • Abnormal results indicate:
  • Seizures (common in CP)
  • Brain dysfunction

• Urinalysis

  • Measures: Chemical & cellular urine content.
  • How it works: Conducted through dipstick tests and microscopy.
  • Abnormal results indicate:
  • Glucose → indicative of Diabetes Mellitus (DM)
  • Protein → indicative of kidney disease
  • Infection

• Blood Analysis

  • Measures: Cells, glucose, electrolytes, and enzymes present in the blood.
  • How it works: Lab testing of blood samples.
  • Abnormal results indicate:
  • High glucose → indicative of DM
  • Infection → indicated by increased white blood cell (WBC) count
  • Anemia → indicated by red blood cell (RBC) count

Vital Signs

• Heart Rate / Pulse

  • Measurement Sites:
  • Radial, brachial, carotid
  • Types of Pulse:
  • Regular: An even rhythm
  • Irregular: Indicates arrhythmia
  • Normal Range: 60-100 beats per minute (bpm)

• Respiration Rate

  • How to Count: Observe chest rise for a duration of 60 seconds.
  • Normal Range: 12-20 breaths per minute
  • Abnormal Conditions:
  • Tachypnea: Fast breathing (greater than 20 breaths/min)
  • Bradypnea: Slow breathing (fewer than 12 breaths/min)

• Blood Pressure

  • Systolic: Pressure measured during heart contraction.
  • Diastolic: Pressure measured during heart relaxation.
  • Commonly taken from: Brachial artery
  • Normal Value: 120/80 mmHg

• Temperature

  • Measurement Sites:
  • Oral: 36.5-37.5°C
  • Axillary: Slightly lower than oral
  • Tympanic: Similar to oral
  • Forehead: Also similar to oral
  • Definition of Febrile: Temperature greater than 38°C

• Pain

  • Measurement Scale: 0-10 pain scale
  • Importance: Indicates injury, inflammation, or disease progression

Importance of Interpreting Diagnostic Findings

• Diabetes Mellitus (DM):

  • Blood glucose levels and urinalysis results guide insulin or medication therapy decisions.

• Spinal Injury (SI):

  • MRI results and neurological findings determine whether surgery or rehabilitation is necessary.

• Cerebral Palsy (CP):

  • EEG and MRI findings are critical for guiding seizure control and therapy plans.

• Correct Interpretation Ensures:

  • Early diagnosis
  • Targeted treatment strategies
  • Prevention of complications

Multiple Choice Questions (MCQs)

1. Which tool measures electrical activity of the heart?

   • A. EEG
   • B. ECG
   • C. MRI
   • D. PET
   • Answer: B

2. Glucose in urine is most associated with:

   • A. Kidney stones
   • B. Infection
   • C. Diabetes Mellitus
   • D. Liver disease
   • Answer: C

3. Tachypnea is defined as:

   • A. Slow breathing
   • B. Normal breathing
   • C. Irregular breathing
   • D. Fast breathing
   • Answer: D

Vital Sign Scenarios

• Scenario 1:

  • A patient has a pulse of 120 bpm and respirations of 28/min.
  • Interpretation: This indicates tachycardia and tachypnea, possibly suggesting an underlying infection, pain, or shock.

• Scenario 2:

  • Temperature is measured at 38.9°C (oral).
  • Interpretation: Febrile status suggests the presence of infection or inflammation.

Diagnostic Test Scenarios

• Scenario 1 (DM):

  • Blood glucose reading: 15 mmol/L and urine glucose present.
  • Indicates: Poorly controlled diabetes.
  • Treatment Support: Adjustment of insulin or medication.

• Scenario 2 (SI):

  • MRI shows signs of spinal cord compression.
  • Indicates: Potential neurological risk.
  • Treatment Support: Surgical intervention and rehabilitation are recommended.

• Scenario 3 (CP):

  • EEG shows abnormal brain wave patterns.
  • Indicates: Presence of seizure activity.
  • Treatment Support: Introduction or adjustment of antiepileptic medication.