DH OSCE Review || all solutions are accurate.
What are the 6 modes of disease transmission? correct answers Direct: Contact from patient's
mouth to non intact skin.
Indirect: Contact with contaminated items.
Aerosols: High speed/Ultrasonic
Droplet: From spatter that contacts non intact skin.
Airborne: Inhalation of contaminated aerosols.
Waterborn: Infection from waterlines.
Maria is air polishing her patient's teeth. The office is warm and the air conditioning is not
working, so Maria opts to not wear her face shield or face mask. Two weeks later, vesicles break
out all over her skin, which are diagnosed as chickenpox.
What is the mode of disease transmission? correct answers Droplet infection
Hepatitis A:
Mode of transmission correct answers Fecal/Oral
Hepatitis B:
Mode of transmission correct answers Blood, saliva, all bodily fluids
Hepatitis C:
Mode of transmission correct answers Blood, saliva, all bodily fluids
Hepatitis D:
Mode of transmission correct answers Blood, saliva, all bodily fluids
NEEDS B TO HAVE D
,"can't have the D w/o boobs"
Hepatitis E:
Mode of transmission correct answers Fecal/Oral
Hepatitis:
Risk of transmission is dependent on: correct answers Virulency
Quantity (level of exposure)
Host immune response.
What treatment considerations do you take into consideration when you have a patient who has a
history of hep? correct answers MD if not clear of status and to determine liver dysfunction if
liver affected, minimize drugs metabolized in liver, monitor prothrombin time (INR), platelet
count, use standard precautions
Post-exposure protocol (if we get exposed): correct answers Stop treatment, remove gloves, wash
wound w soap and water, gloves on, complete procedure to ensure patient comfort and safety,
review patient med history, ask patient to get tested to determine infectious status, if you don't
know source, get baseline test
HIV:
Pre-appointment considerations correct answers CD4 count to know immune response- below
200 cells/mm- do not treat
HIV:
What are possible intra/extra oral findings? correct answers EO: lymphadenopathy or skin
lesions (herpetic or Kaposi's sarcoma)
IO: fungal infections (candidiasis), hairy leukoplakia, Kaposi's sarcoma, viral lesions (HPV or
CMV)
, Medical history:
Examples of "yes" or positive answers on a medical history that may require pre-appointment
considerations: correct answers Physical condition (defective heart valve or congenital heart
condition)
Systemic disease (diabetes, leukemia or immunodeficienes)
Drug therapy (steroid, chemotherapeutics, or blood thinners)
Prosthesis or TJR
Aerosols correct answers Particle occurs in solid or liquid form (invisible) and remains
suspended in air.
Spatter correct answers Heavier larger particles that remain airborne for short time and are
visible.
Tuberculosis:
Organism & Route of Transmission correct answers Organism: Mycobacterium tuberculosis
Inhalation of fresh droplets containing tubercle bacilli by individual coughing, breathing,
sneezing.
Your patient marks "yes" for history of TB. What do you do? correct answers Clinically active:
do not treat until MD clearance
Past history: MD consult to determine current status
Tests: CXR and tuberculin test (Mantoux)
Drugs used: Isoniazid, Pyramzinamide, or Rifampin daily for 6 months
Low level disinfectant correct answers Inactivates vegetative bacteria/certain lipid-type viruses
(not spores, tubercle bacilli, or nonlipid viruses)
Intermediate level disinfectant correct answers Cavi-wipes; blood and bacteria NOT spores;
inactivates all form microorganisms (not spores) *used in dental offices
What are the 6 modes of disease transmission? correct answers Direct: Contact from patient's
mouth to non intact skin.
Indirect: Contact with contaminated items.
Aerosols: High speed/Ultrasonic
Droplet: From spatter that contacts non intact skin.
Airborne: Inhalation of contaminated aerosols.
Waterborn: Infection from waterlines.
Maria is air polishing her patient's teeth. The office is warm and the air conditioning is not
working, so Maria opts to not wear her face shield or face mask. Two weeks later, vesicles break
out all over her skin, which are diagnosed as chickenpox.
What is the mode of disease transmission? correct answers Droplet infection
Hepatitis A:
Mode of transmission correct answers Fecal/Oral
Hepatitis B:
Mode of transmission correct answers Blood, saliva, all bodily fluids
Hepatitis C:
Mode of transmission correct answers Blood, saliva, all bodily fluids
Hepatitis D:
Mode of transmission correct answers Blood, saliva, all bodily fluids
NEEDS B TO HAVE D
,"can't have the D w/o boobs"
Hepatitis E:
Mode of transmission correct answers Fecal/Oral
Hepatitis:
Risk of transmission is dependent on: correct answers Virulency
Quantity (level of exposure)
Host immune response.
What treatment considerations do you take into consideration when you have a patient who has a
history of hep? correct answers MD if not clear of status and to determine liver dysfunction if
liver affected, minimize drugs metabolized in liver, monitor prothrombin time (INR), platelet
count, use standard precautions
Post-exposure protocol (if we get exposed): correct answers Stop treatment, remove gloves, wash
wound w soap and water, gloves on, complete procedure to ensure patient comfort and safety,
review patient med history, ask patient to get tested to determine infectious status, if you don't
know source, get baseline test
HIV:
Pre-appointment considerations correct answers CD4 count to know immune response- below
200 cells/mm- do not treat
HIV:
What are possible intra/extra oral findings? correct answers EO: lymphadenopathy or skin
lesions (herpetic or Kaposi's sarcoma)
IO: fungal infections (candidiasis), hairy leukoplakia, Kaposi's sarcoma, viral lesions (HPV or
CMV)
, Medical history:
Examples of "yes" or positive answers on a medical history that may require pre-appointment
considerations: correct answers Physical condition (defective heart valve or congenital heart
condition)
Systemic disease (diabetes, leukemia or immunodeficienes)
Drug therapy (steroid, chemotherapeutics, or blood thinners)
Prosthesis or TJR
Aerosols correct answers Particle occurs in solid or liquid form (invisible) and remains
suspended in air.
Spatter correct answers Heavier larger particles that remain airborne for short time and are
visible.
Tuberculosis:
Organism & Route of Transmission correct answers Organism: Mycobacterium tuberculosis
Inhalation of fresh droplets containing tubercle bacilli by individual coughing, breathing,
sneezing.
Your patient marks "yes" for history of TB. What do you do? correct answers Clinically active:
do not treat until MD clearance
Past history: MD consult to determine current status
Tests: CXR and tuberculin test (Mantoux)
Drugs used: Isoniazid, Pyramzinamide, or Rifampin daily for 6 months
Low level disinfectant correct answers Inactivates vegetative bacteria/certain lipid-type viruses
(not spores, tubercle bacilli, or nonlipid viruses)
Intermediate level disinfectant correct answers Cavi-wipes; blood and bacteria NOT spores;
inactivates all form microorganisms (not spores) *used in dental offices
