Which of the following is the correct angle of insertion when performing venipuncture using the evacuated tube method?
50°
30°
90°
75°
The Correct Answer is B
Choice A Reason:
An angle of 50° is too steep for venipuncture and increases the risk of going through the vein and causing injury to structures beneath it. A steeper angle can also make it more difficult to control the depth of the needle, leading to an increased chance of puncturing the posterior wall of the vein.
Choice B Reason:
An angle of 30° is the recommended angle for venipuncture as it allows for a smooth entry into the vein without going too deep. This angle helps to ensure that the needle enters the vein in a controlled manner and minimizes the risk of injury to the patient. It also provides a good balance between ease of entry and control over the needle's depth.
Choice C Reason:
An angle of 90° is not recommended for venipuncture because it is perpendicular to the skin, which greatly increases the risk of passing through the vein entirely and causing injury. This angle does not allow for any control over the depth of the needle and is likely to cause discomfort or pain to the patient.
Choice D Reason:
An angle of 75° is also too steep for safe venipuncture. Similar to a 50° angle, it increases the risk of penetrating the posterior wall of the vein and potentially damaging surrounding tissues or arteries. It is important to use a lower angle to ensure the safety and comfort of the patient during the procedure.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A reason:
Performing a heel stick on a 5-year-old patient is not an appropriate technique. Heel sticks are typically used for infants, particularly newborns, to minimize discomfort and because their finger pads may not be fully developed for finger sticks. By the age of 5, a child's veins are usually developed enough for venipuncture, which is the preferred method.
Choice B reason:
Performing a finger stick on a toddler patient is an appropriate technique for specimen collection. This method is commonly used for children who are not yet old enough for venipuncture but have outgrown the heel stick method. The finger stick is performed on the palmar surface of the distal phalanx, usually of the middle or ring finger, and is considered safe and effective for collecting small blood samples in toddlers.
Choice C reason:
Performing a thumb stick on an infant is not an appropriate technique. The thumb has a pulse and is more sensitive, which can cause unnecessary pain and distress to the infant. Additionally, the thumb's size and increased movement make it a less suitable site for specimen collection in infants.
Choice D reason:
Performing a thumb stick on a 5-year-old patient is also not an appropriate technique. As with infants, the thumb's sensitivity and the presence of a pulse make it a less desirable site for blood collection. For a 5-year-old, venipuncture or a finger stick on a non-thumb finger would be more appropriate and less distressing.
Correct Answer is B
Explanation
Choice A Reason:
Neutralization typically involves a chemical reaction to render a substance harmless or inert. In the context of a blood spill, neutralization would not be the primary concern, as the goal is to eliminate any potential infectious agents, not just to neutralize them.
Choice B Reason:
Disinfection is the process of cleaning an area or surface to destroy or prevent the growth of disease-causing microorganisms. When dealing with a blood spill, disinfection is crucial to ensure that any bloodborne pathogens present are effectively killed, reducing the risk of infection transmission.
Choice C Reason:
Containment refers to the measures taken to control or limit something, in this case, a spill. While containment is an important initial step in managing a spill to prevent it from spreading, it is not the process that refers to the actual cleaning and elimination of pathogens.
Choice D Reason:
Sterilization is a process that destroys all forms of microbial life, including spores, usually through the application of heat, chemicals, or irradiation. While sterilization is a more extreme level of decontamination than disinfection, it is not typically used for routine cleaning of blood spills on counters.
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