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首页> 外文期刊>European journal of anaesthesiology >Comparing tissue coring potentials of hollow needles without stylet and caudal needles with stylet: an experimental study.
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Comparing tissue coring potentials of hollow needles without stylet and caudal needles with stylet: an experimental study.

机译：比较无管心针的空心针和有管心针的尾针的组织取芯潜力：一项实验研究。

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BACKGROUND AND OBJECTIVES: Although the association of tissue coring and development of epidermoid tumour has been proposed, the extent and frequency of such coring is still controversial and the viability of carried cells has not been substantiated. In the present study, we used an experimental model without needle removal to investigate the incidence of tissue coring using two different needle types. METHODS: We inserted 22-G caudal (n = 34) or 22-G hollow (n = 25) needles to the tumour-free areas of fresh modified mastectomy specimens. The specimen was stretched and needles were inserted perpendicular to the skin and forced to penetrate the full thickness of the specimen. Without removing the needle, the needle cavity was then washed with 2 mL of RPMI 1640 with L-Glutamine and the washings were collected in a 15-mL falcon tube. The tubes were sealed and labelled and processed to obtain cytologic preparations. The slides were evaluated under a light microscope. RESULTS: A high rate of epithelial celltransportation was noted. All the carried cells were stratum corneum cells with no nucleus. No nucleated cells were seen. The incidence of carried cells was 64.7% and 72.0% in the caudal and hollow needle groups, respectively (P 0.05). CONCLUSION: Only cells from the outermost layer, stratum corneum, which is made of dead flat skin cells, were transported with needle puncture. The risk of epidermoid tumour development after regional anaesthesia must therefore be low. The incidence of transporting non-nucleated stratum corneum cells was similar between hollow and caudal needles.
机译：背景与目的：尽管有人提出了组织取芯与表皮样肿瘤发展的关系，但这种取芯的程度和频率仍存在争议，携带细胞的生存能力尚未得到证实。在本研究中，我们使用了不拔针的实验模型来研究使用两种不同针头类型的组织取芯的发生率。方法：我们在新鲜改良的乳房切除术标本的无肿瘤区域中插入了22-G尾针（n = 34）或22-G空心针（n = 25）。拉伸样品并垂直于皮肤插入针，并迫使其穿透样品的整个厚度。然后不取下针头，然后用2 mL含L-谷氨酰胺的RPMI 1640清洗针腔，并将洗液收集在15 mL的猎鹰管中。将试管密封，标记和加工以获得细胞学制剂。在光学显微镜下评估载玻片。结果：上皮细胞运输率很高。所有携带的细胞均为无核的角质层细胞。未见有核细胞。尾针和空心针组的携带细胞发生率分别为64.7％和72.0％（P> 0.05）。结论：只有最外层的角质层细胞是由扁平的死皮细胞构成的，这些细胞只能通过针刺来运输。因此，区域麻醉后表皮样肿瘤发展的风险必须较低。在空心针和尾针之间，无核角质层细胞转运的发生率相似。

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