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His ECG shows a sinus tachycardia but no acute ischaemic changes.
His arterial blood bases are as follows: pH = 7.30, PaO2 = 14kPa on air, PaCO2 = 4.5kPa, HCO3 = 20mmol/l, BE = -4, SaO2 96.6%.
You examine his chest x-ray. Identify the key abnormality visible on the CXR?
Click on the x-ray to enlarge.
You suspect that this patient has an acute thoracic aortic dissection and that the initial low pulse oximetry may have been related to impaired perfusion of the limb to which the pulse oximeter was attached.
Upon further examination, you find that he does indeed have differential pulses and blood pressures between the two arms. You recognise that control of his blood pressure is a priority.
Which one of the following statements regarding blood pressure control in this patient is least appropriate?