This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A calcium channel blocker has been prescribed for a client with hypertension. The nurse explains ... (Read 56 times)

xclash

  • Hero Member
  • *****
  • Posts: 681
on: Jul 23, 2018
A calcium channel blocker has been prescribed for a client with hypertension. The nurse explains that this drug affects the function of the L-type calcium channel by which action?
 
  1. Enhancing the action potential along the cell membrane
  2. Changing the shape of the L-type calcium channel
  3. Blocking sympathetic input to the cell membrane
  4. Competing for calcium receptors on the L-type calcium channel

Question 2

The nurse is assessing a client taking both verapamil and digoxin. Which finding indicates an adverse interaction of this drug combination?
 
  1. Pulse rate 51 beats per minute
  2. Respiratory rate 42 breaths per minute
  3. Blood pressure 184/96 mmHg
  4. Serum potassium 5.6 mEq/L


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

covalentbond

  • Sr. Member
  • ****
  • Posts: 336
Reply #1 on: Jul 23, 2018
Answer to Question 1

Correct Answer: 2
Rationale 1: Opening of the calcium channel and entry of calcium into myocytes and vascular smooth muscle cells occur in response to the action potential, but calcium channel blockers do not exert their therapeutic effects by interfering with the action potential.
Rationale 2: By altering the shape of the calcium channel, calcium channel blockers prevent entry of calcium into cells.
Rationale 3: The L-type calcium channel opens in response to sympathetic stimulation, but calcium channel blockers do not inhibit this input.
Rationale 4: The role of the calcium channel is to control entry of calcium into cells. The calcium channel blockers prevent entry of calcium through the channel without competing for receptors with calcium ions.
Global Rationale: By altering the shape of the calcium channel, calcium channel blockers prevent entry of calcium into cells. Opening of the calcium channel and entry of calcium into myocytes and vascular smooth muscle cells occur in response to the action potential, but calcium channel blockers do not exert their therapeutic effects by interfering with the action potential. The L-type calcium channel opens in response to sympathetic stimulation, but calcium channel blockers do not inhibit this input. The role of the calcium channel is to control entry of calcium into cells. The calcium channel blockers prevent entry of calcium through the channel without competing for receptors with calcium ions.

Answer to Question 2

Correct Answer: 1
Rationale 1: Risk of bradycardia is greater with this drug combination, since both drugs slow conduction through the AV node.
Rationale 2: The drugs are not associated with an increase in respiratory rate.
Rationale 3: Hypertension is not associated with either drug.
Rationale 4: Hyperkalemia does not occur as a result of the interaction of these drugs, although if serum potassium is abnormally high for another reason, potassium ions might compete for digoxin receptors and decrease the therapeutic effect of digoxin.
Global Rationale: Risk of bradycardia is greater with this drug combination, since both drugs slow conduction through the AV node. The drugs are not associated with an increase in respiratory rate. Hypertension is not associated with either drug. Hyperkalemia does not occur as a result of the interaction of these drugs, although if serum potassium is abnormally high for another reason, potassium ions might compete for digoxin receptors and decrease the therapeutic effect of digoxin.


xclash

  • Member
  • Posts: 681
Reply 2 on: Jul 23, 2018
Great answer, keep it coming :)

recede

  • Member
  • Posts: 315
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates's recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.

Did you know?

People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.

Did you know?

Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.

Did you know?

Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.

Hypertension drugs Hypertension drugs
Nurse administering enteral nutrition through a feeding tube. Nurse administering enteral nutrition through a feeding tube.
Sample client goals from the Wellness Massage Pyramid. Sample client goals from the Wellness Massage Pyramid.
Use face cradle covers to prevent the client’s skin from touching the face cradle upholstery. Use face cradle covers to prevent the client’s skin from touching the face cradle upholstery.
Brown Bread contains calcium, phosphorous, potassium, iron, magnesium and sodiu Brown Bread contains calcium, phosphorous, potassium, iron, magnesium and sodiu
Nurse using a stethoscope Nurse using a stethoscope
Video: Hemoglobin's affinity with oxygen - carbon dioxide, temperature and bisphosphoglycerate (BPG)

For a complete list of videos, visit our video library