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• W4248547319 abstract "Abstract Purpose: The purpose of this study is to come up with new methods to quantitate the blood loss under endoscope and explore the influence of blood loss on percutaneous endoscopic lumbar discectomy (PELD). Methods: Clinical research and in-vitro experiment are combined. In the in-vitro experiment, 2.0 ml blood was diluted in different ratio to simulate the rinse solution of PELD, the hematocrit method (HCT-M) and red blood cell count method (RBC-M) were came up to estimate blood loss and the new methods were calibrated with the directly measurement method (Direct-M). In clinical research, 74 patients with L5/S1 disc herniation were treated with PELD, HCT-M and the empirical method (EMP-M) were used to estimate the blood loss under endoscope. According to blood loss, all patients were divided into group A (≤10 ml) and group B (>10 ml). The blood loss, operation time, fluoroscopy frequency, visual analog scale (VAS) and oswestry disability index (ODI) scores were compared between the two groups. Results: In the in-vitro experiment, the hematocrit of the rinse solution was always stable over time. The estimated blood loss by HCT-M was stable and quite approximate to actual blood volume (2.0 ml) whatever the blood dilution ratio, while according to RBC-M, the estimated blood loss was close to the actual blood volume only when the dilution ratio was greater than 300 times. In clinical research, the blood loss estimated by HCT-M was higher than that by EMP-M in both groups (P<0.05). There was a significant difference between group A and group B in blood loss (7.40±1.61 vs 19.91±10.94 ml), operation time (80.51±34.70 vs 136.51±41.88 min), and fluoroscopy frequency (6.92±1.52 vs 11.11±2.32 times) (P<0.05). The VAS and ODI scores in group B were higher than that in group A 1 week after operation (P<0.05), however the scores were not different between the two groups at pre-operation (P>0.05). Conclusion: HCT-M is a reliable method to estimate endoscopic blood loss in PELD. The amount of endoscopic blood loss affects the operative procedure in operation time and fluoroscopy frequency, as well as clinical effects in VAS and ODI scores after operation in short-term" @default.
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• W4248547319 date "2020-04-21" @default.
• W4248547319 modified "2023-10-14" @default.
• W4248547319 title "Estimation and influence of blood loss under endoscope for percutaneous endoscopic lumbar discectomy (PELD): a clinical observational study combined with in-vitro experiment" @default.
• W4248547319 doi "https://doi.org/10.21203/rs.3.rs-23638/v1" @default.
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