Business law. Case study, Richard, an impoverished university student, and his millionaire father enter into an arrangement where Richard agrees that he will keep the front- and backyards of the family property mowed, and he will 'does a bit' to keep the gardens looking tidy. In return, his father agrees to pay him a weekly allowance of $200. His father had previously used a garden contractor to do the job and paid him $350. They live on a one-hectare property, and the mowing alone takes half a day a week. After four weeks, Richard's father tells him that he can't afford to pay $200 a week. He says that Richard should be doing the work for nothing, as it is the responsibility of the whole family to look after the property; besides, he says, Richard is getting free board and lodging. Advise Richard.

44 What is the rationale behind the use of desmopressin in bleeding disorders?

45 What effect does the contraceptive pill have on the blood fibrinogen level and on blood coagulability?

46 Does standard (unfractionated) heparin in doses of 10 000-15 000 units/day need monitoring?

47 Is there an antidote for low-molecular-weight heparin (LMWH)? Can Enoxaprin be used?

48 1. What is the mechanism of the action of aprotinin? 2. What is the therapeutic window for aprotinin? 3. In a case of haemorrhagic stroke, how many days should aprotinin be prescribed for and what is the recommended dosage?

49 My question is, what are thrombophilia scan tests? Can we use these in patients on anticoagulant therapy?

50 In thromboembolic disorders, how is clopidogrel superior to aspirin? Question 51 What are the definitions for prothrombin time (PT) and partial thromboplastin time (PTT), and how are they different?

52 1. Why, in chronic disease anaemia, are serum iron and the total ironbinding capacity (TIBC) low? 2. Why, in sideroblastic anaemia with increased levels of serum iron, is the TIBC normal?

53 What is the red cell distribution width (RDW) value above which anisocytosis can be diagnosed?

54 Is anisocytosis diagnostic of iron deficiency anaemia?

55 In the case of a patient who has been treated with streptokinase and has bleeding complications in the form of haematemesis, haemoptysis or similar, how can the effect of streptokinase on the coagulation system be reversed, and can tranexamic acid help?

56 We know that salmonella infection is a common complication in patients with sickle cell anaemia. Is this true for patients with thalassaemia major and, if so, why?