Serological examination 1, the patient mostly take a sitting position, one side of the arm on the laboratory table, palm up, stretching the forearm, exposure of the puncture site; 2, the blood collector will be placed on the blood collection site above the pressure band, and around the arm in a circle to tie a knot, the patient needs to tighten and relax the fist several times, so that the vein bulging; 3, the end of the collection of blood, the patient needs to loosen the fist, with a disinfectant swab to gently press the puncture site for 3 minutes. Ultrasound examination 1, before the examination, you need to drink water, moderately fill the bladder, help ultrasound image observation; 2, the examinee take the supine position, calm breathing, hands on both sides of the head; 3, the doctor will be pregnant women in the abdomen or the instrument probe coated with coupling agent, after that, with a probe to the abdomen, move the probe to obtain the image.