Question

20,/Prior to hip replacement surgery, a patient receives an injection of an anticoagulant drug at a dose of 30 mg. Following the patient's surgery, the drug is injected at 1 mg/kg. For a 140-lb patient, calculate the total of the pre-and postsurgical doses

Can you please solve this step by step. I'm not sure how to work this problem out. Thank you so much for your time!

Answer 1

The pre-surgical dose is 30 mg of anticoagulant drug

Patient weight is 140 lbs, to convert lbs to kgs divide the mass with 2.2

                          = 140 $\div$ 2.2

                          = 63.6 kgs

To get the dose per kg body weight divide the dose with total body weight

                            = 30 $\div$ 63.6

                            = 0.47 mg

The patient was given 0.47 mg per kg body weight of anticoagulant drug pre-operatively.

The post-surgical dose is 1 mg per kg of body weight

                         = 63.6 kgs $\times$ 1 mg

                         = 63.6 mg

The patient should be given 63.6 mg of anticoagulant drug post-operatively.