Bryant J K, Strand C L
Am J Clin Pathol. 1987 Jul;88(1):113-6. doi: 10.1093/ajcp/88.1.113.
This is a study of 130 matched venipuncture and intravascular blood cultures collected from 53 patients. In 99 cultures (76.1%), both the venipuncture and the catheter specimens were negative. There were six matched cultures yielding significant isolates: in three both the venipuncture and intravascular specimens were positive; in two only the intravascular specimen was positive; and in one only the venipuncture specimen was positive. Twenty-five cultures were positive from the intravascular specimen only, and 23 of these were classified as contaminated cultures. Thus, the contamination rate was significantly higher in the intravascular catheter blood culture specimens (P less than 0.001). These results indicate that blood culture specimens should not be routinely collected from intravascular catheters unless collection by venipuncture is impossible.
这是一项对从53名患者身上采集的130对静脉穿刺和血管内血培养样本的研究。在99份培养样本（76.1%）中，静脉穿刺样本和导管样本均为阴性。有6对培养样本培养出了有意义的分离菌：3对中静脉穿刺样本和血管内样本均为阳性；2对中仅血管内样本为阳性；1对中仅静脉穿刺样本为阳性。仅血管内样本有25份培养结果为阳性，其中23份被归类为污染培养物。因此，血管内导管血培养样本的污染率显著更高（P小于0.001）。这些结果表明，除非无法通过静脉穿刺采集血培养样本，否则不应常规从血管内导管采集血培养样本。
