A nurse is caring for a client who is postoperative following knee arthroplasty and has a new prescription for enoxaparin 1mg/kg subcutaneous. The client weighs 185 lb. How many mg should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

A. Increase sodium intake - This is not a preventive measure for osteoporosis. High sodium intake can lead to increased calcium excretion and weaken bones.

B. Drink a cup of coffee each morning - Caffeine consumption, especially in excess, can interfere with calcium absorption and increase calcium excretion. Limiting caffeine intake is recommended for bone health. Drinking coffee in moderation is acceptable but excessive consumption should be avoided.

C. Have a bone-density scan each year - While bone-density scans (DEXA scans) are useful for diagnosing osteoporosis or assessing bone health, they are not typically recommended for young adults with a family history of osteoporosis unless there are specific risk factors present. Yearly scans are unnecessary and not cost-effective for young adults without significant risk factors.

D. Engage in weight-bearing exercise regularly - Weight-bearing exercises, such as walking, jogging, dancing, and resistance training, help to increase bone density and strength. Regular physical activity, especially weight-bearing exercises, is a recommended preventive measure against osteoporosis.

A. Inadequate immobilization: Proper immobilization is essential for fractured bones to heal correctly. Immobilization, often achieved through casts, splints, or other orthopedic devices, stabilizes the broken bone fragments, allowing them to fuse back together. If the immobilization is not sufficient or if the patient doesn't follow the prescribed immobilization protocol, there can be excessive movement at the fracture site, hindering the healing process.

B. Venous thromboembolism: Venous thromboembolism (VTE) refers to the formation of blood clots in veins, usually in the legs (deep vein thrombosis) that can travel to the lungs (pulmonary embolism). While VTE is a potential complication after a fracture, it is not a direct cause of delayed bone union.

C. Inadequate vitamin D intake: Vitamin D is essential for bone health as it helps the body absorb calcium, which is crucial for bone formation and maintenance. Inadequate vitamin D levels can weaken bones and impair the healing process, but it's not a common cause of delayed bone union unless there are severe deficiencies or underlying medical conditions.

D. Bleeding at the injury site: Bleeding at the injury site occurs immediately after the fracture and is a natural part of the body's response to injury. While excessive bleeding can lead to complications, it is not a likely cause of delayed bone union six weeks after the injury. In the early stages of healing, bleeding is replaced by the formation of a hematoma, which eventually transforms into a callus and aids in the bone healing process.