The pain depends on the technique of the person insertingtheneedle - how fast they put it in - in order to minimize the pain for the patient.
疼痛取决于下针的人的技术——动作要快——这样才能减少患者的痛苦。
2
The current vascular puncture needle cannot judge whether an outer sleeve enters the blood vessel or not, and the success rate of inserting the outer sleeve after puncture is not high.
目前血管穿刺针无法判断外套管是否进入血管，穿刺后置入外套管成功率不高。
3
In addition, space for placing the bone fragment is left between the connecting arm, theinsertingneedle controller and the orifice positioning needle.