Stroke, vascular abnormalities, and venous thromboses are uncommon causes of headache.
因脑卒中、血管畸形与静脉血栓形成引起的头痛并不常见。
2
Arterial thromboses are far more common in the brain than venous thromboses (by a ratio of about 100 to 1).
在脑部，动脉血栓比静脉血栓更常见(比例大约是100比1)。
3
Although pressure ulcers (28.9%) and urinary tract infections (39%) were common, deep venous thromboses (4.8%) and depression (5.8%) were seldom detected.