Which of the following would be least likely to cause a "fuzzy" image on oil power?
a. Using a plan-achromatic objective lens
b. Objective not screwed in tightly
c. Not enough oil on the slide when using oil immersion lens
d. Focus controls not adjusted
ANS: A
When an objective is not screwed in tightly, not enough oil has been used on a slide when using an oil immersion lens, or the focus controls are not adjusted, an image is likely to be fuzzy or unclear, making it difficult to visualize objects. Using a plan-achromatic lens gives a flat field so that the edges of the field are in focus at the same time as the center.
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You and your EMT partner are preparing to ventilate an elderly non-trauma patient who has a stoma. Your partner performs the head-tilt, chin-lift maneuver and you ask him to return the patient's head to a neutral position. "Why? This is not a pediatric patient!" your partner protests. What would you say?
A) Stoma breathers should only have their airways positioned after placement of the ventilation device. B) It is not necessary to position the airway of a stoma breather when providing ventilations. C) Using the head-tilt, chin-lift prior to clearing any mucus plugs from the stoma can cause airway occlusion. D) Elderly patients should never have their heads tilted back because spinal curvatures are common and can prevent airway positioning.
Atrophy means muscles ________
A) will be scarred B) develop excessively in childhood C) waste away D) have increased growth
In which section of the SOAPIER format should the patient's response to a specific treatment modality be recorded?
a. Assessment b. Implementation c. Observation d. Evaluation
During which abnormal birth presentation is it permissible for the EMT to place a gloved hand into the vaginal canal?
A) Placenta previa B) Multiple birth delivery C) Prolapsed umbilical cord D) Limb presentation