MDS PREP
Maximum recommended dosage of lignocaine with 1:1,00,000 adrenaline subcutaneously is
1. 100 mg
2. 30 mg
3. 500 mg
4. 700 mg
Maximum recommended dosage of lignocaine with 1:1,00,000 adrenaline subcutaneously is 100 mg.
Which is the best method to counteract severe acidosis following cardiopulmonary resuscitation?
1) Administration of adrenaline by IV routes
2) Administration of sodium bicorbonate intravenously
3) Administration of adrenaline intramuscularly
4) No treatment is necessary because it is self-limiting
Oral Surgery
Answer: 2
Severe acidosis, particularly metabolic acidosis, can occur following
prolonged cardiac arrest and subsequent CPR. The primary goal in managing such
cases is to restore normal pH levels in the body, which is crucial for proper
cellular function and overall physiological homeostasis.
1. Sodium bicarbonate Sodium bicarbonate is a strong base that reacts with
hydrogen ions (H+), which are responsible for acidity in the blood, to form
carbon dioxide (CO2) and water (H2O). This reaction helps to neutralize the
excess hydrogen ions, thereby raising the pH of the blood. It is administered
intravenously because it allows for rapid distribution throughout the body and
direct access to the circulatory system where it can counteract acidosis most
effectively. The intravenous route ensures that the medication reaches the
bloodstream quickly and in a controlled manner, making it the preferred method
for acute and severe cases.
2. Adrenaline (epinephrine)*: Although adrenaline is a crucial medication used
in CPR for its vasopressor and cardiac stimulant effects, it is not the primary
treatment for severe acidosis. Adrenaline is typically administered to improve
cardiac output and blood pressure during CPR.
The primary airway hazard for an unconscious patient in a supine position is
1) Tongue obstruction
2) Bronchospasm
3) Laryngospasm
4) Aspiration
Oral Surgery
Answer: 1
In an unconscious patient lying supine, the tongue can fall back and obstruct
the airway due to loss of muscle tone. This is the most common airway hazard in
this position.
Among the following, which condition is a containdictation to the use of local anaesthetic agent?
1. Parkinson"s disease
2. Liver damage
3. Pregnancy
4. Hypersensitivity to the drug
Oral Surgery
Answer: 4
Hypersensitivity to the drug is a contraindication to the use of local anaesthetic agent.
Most commonly used local anaesthesia
1. 1: 20,000 xylocaine HCL
2. 1: 50,000 xylocaine HCL
3. 1: 10,000 xylocaine HCL
4. 1: 80,000 xylocaine HCL
Oral Surgery
Answer: 4
Most commonly used local anaesthesia is 1: 80,000 xylocaine HCL.
Frequently which of the following constitutes is amide type local anaesthesia causes allergic reaction
1. Lignocaine hydrochloride
2. Methyl paraben
3. Adrenaline
4. Contaminants in the solution
Oral Surgery
Answer: 2
Methyl paraben frequently causes allergic reactions in amide type local anaesthesia.
Pericoronitis is seen in relation to
1) Impacted third molars only
2) Around incompletely erupted crown
3) Completely erupted crowns only
4) None of the above
Oral Surgery
Answer: 2
Pericoronitis is an inflammation of the soft tissue surrounding the crown of an incompletely erupted tooth, commonly seen around the third molars (wisdom teeth) but can also occur with other teeth. The condition arises when food particles, bacteria, and plaque accumulate around the partially erupted molar, leading to localized infection.
Thus, pericoronitis is most commonly associated with teeth that are not fully erupted
One decided to use forceps for removal of a tooth. The first direction for the force to be applied is
1. Buccally
2. Lingually or palatally
3. Apically
4. Occlusally
Oral Surgery
Answer: 3
When using forceps for removal of a tooth, the first direction for the force to be applied is apically.