A 42-year-old patient is scheduled for surgery that will likely require a transfusion. Because the patient has a rare blood type, an autologous blood transfusion is planned. Prior to surgery, 1500 mL of blood is collected. The collection tubes contain calcium citrate to prevent coagulation. Which of the following is the mechanism for citrate’s anticoagulative action?
A: Activating plasminogen
B: Binding factor XII
C: Blocking thrombin
D: Chelating calcium
A: Activating plasminogen
B: Binding factor XII
C: Blocking thrombin
D: Chelating calcium
举一反三
- A 42-year-old patient is scheduled for surgery that will likely require a transfusion. Because the patient has a rare blood type, an autologous blood transfusion is planned. Prior to surgery, 1500 mL of blood is collected. The collection tubes contain calcium citrate to prevent coagulation. Which of the following is the mechanism for citrate’s anticoagulative action?
- Which of the following methods can not treat hyperkalemia? A: Infusion of calcium gluconate B: Infusion of sodium bicarbonate C: Hemodialysis D: Large inventory of blood transfusion
- The main function of calcitonin is A: increase blood calcium and blood phosphorus B: decrease blood calcium and blood phosphorus C: decrease blood calcium and increase blood phosphorus D: increase blood calcium and decrease blood phosphorus E: involve in the normal calcium regulation
- Paratfollicular cells or C cells of thyroid also secrete calcitonin, which has the function of ( ). A: Enhancing osteoblast activity B: Promoting the conversion of bone calcium into blood calcium C: Promoting calcification of bone tissue D: Reducing blood calcium E: Elevating blood calcium
- Poor dietary intake of calcium is not likely to result in low blood calcium.