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If blood flow to the brain is interrupted, how quickly does cellular death occur?

A.

8 minutes.

B.

2 minutes

C.

20 minutes

D.

5 minutes

Answer and Explanation

The Correct Answer is B

B. Brain cells begin to die within 2 minutes if blood flow is interrupted, which is why rapid intervention is crucial during a stroke or other conditions that block cerebral blood flow.
A. 8 minutes is too long for brain cells to survive without oxygen.
C. 20 minutes is too long for brain cells to survive without oxygen.
D. 5 minutes is too long for brain cells to survive without oxygen.
 


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Related Questions

Correct Answer is B

Explanation

A. Glucose level, BP, and brain tissue: Glucose level is not a key component of ICP balance.
B. BP, brain tissue, and cerebrospinal fluid: These are the primary components that contribute to ICP balance. Changes in any of these can affect pressure inside the skull.
C. BP, brain tissue, body mass index: BMI is not directly related to ICP balance.
D. BP, brain tissue, and ventricles of the brain: The ventricles are involved in cerebrospinal fluid production but are not one of the primary components of ICP balance as a whole.

Correct Answer is D

Explanation

A. Allow the client to ambulate is generally acceptable, but should be done cautiously to avoid any strain on the eyes.
B. Remove the eye patch during the day is incorrect as the eye patch is usually kept in place to protect the eye during the early stages of recovery.
C. Encourage coughing and deep breathing should be done with caution as excessive coughing or straining can increase intraocular pressure.

D. After retinal repair surgery, it's important to avoid activities that may increase intraocular pressure or strain the eyes, such as reading and writing. These activities can cause excessive eye movement and stress, hindering the healing process.

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