【摘要】 目的 探討長透析齡腹膜透析慢性腎臟病(CKD)患者的臨床特點、腹膜功能變化,以及標準化蛋白分解率(nPCR)診斷該類患者透析充分性的效能。方法 選擇2009至2022年在東莞東華醫院行維持性不臥床腹膜透析(CAPD)的CKD患者,分為長透析齡組和短透析齡組,長透析齡組根據腹膜平衡試驗中D/Pcr的平均值分為高腹膜平衡試驗(PET)組和低PET組,比較各組間差異。應用Friedman檢驗分析溶質轉運的變化趨勢,Spearman檢驗和受試者操作特征(ROC)曲線分別評估nPCR與透析充分性的相關性和診斷效能。結果 長透析齡人群中,高PET組血白蛋白、nPCR較低,肌酐清除指數(Ccr)較高,透析前5年的D/Pcr呈先下降后回升的趨勢。nPCR與Ccr、尿素清除指數(Kt/V)呈正相關(rs分別為0.305,0.288,均P lt; 0.05),與D/Pcr呈負相關(rs=-0.417,P lt; 0.001),且nPCR診斷透析充分性的ROC曲線下面積為0.68(均P lt; 0.05)。結論 在長透析齡CKD患者中,腹膜功能呈先下降后升高的趨勢,nPCR可作為營養指標用于評估透析的充分性。
【關鍵詞】 腹膜透析;腹膜功能;標準化蛋白分解率;透析充分性;透析齡
Diagnostic value of normalized protein catabolic rate in chronic kidney disease patients with long-term peritoneal dialysis
WANG Yangyang1,2, HU Jieping1, ZHENG Wei1, TANG Xingming1,2
(1. Department of Nephrology, Rheumatism and Immunology, Dongguan Tungwah Hospital, Dongguan 523000, China;
2. Guangdong Medical University, Zhanjiang 524000, China)
Corresponding author: TANG Xingming, E-mail: txingm@mail3.sysu.edu.cn
【Abstract】 Objective To investigate the clinical characteristics and peritoneal function changes in chronic kidney disease (CKD) patients undergoing long-term peritoneal dialysis (PD), and to evaluate the diagnostic utility of normalized protein catabolic rate (nPCR) in assessing dialysis adequacy in this population. Methods CKD patients receiving continuous ambulatory peritoneal dialysis (CAPD) at Dongguan Tungwah Hospital from 2009 to 2022 were selected, and divided into long-term and short-term dialysis groups. The long-term dialysis group was further categorized into high and low peritoneal equilibration test (PET) subgroups according to the average D/Pcr from PET. Intergroup differences were compared. The trend of solute transport was analyzed using the Friedman’s test, while Spearman’s correlation and receiver operating characteristic (ROC) curve analysis were employed to assess the correlation between nPCR and dialysis adequacy, and the diagnostic performance of nPCR, respectively. Results Among long-term dialysis patients, those in the high PET subgroup exhibited lower levels of serum albumin and nPCR, but higher creatinine clearance index (Ccr) (all P lt; 0.05). The D/Pcr showed a downward trend followed by an upward trend over the first five years of dialysis (all P lt; 0.05). nPCR was positively correlated with Ccr (rs=0.305, P lt; 0.05) and urea clearance index (Kt/V, rs=0.288,P lt; 0.05), and negatively correlated with D/Pcr (rs=-0.417, P lt; 0.001). The area under the ROC curve for nPCR in diagnosing dialysis adequacy was 0.68 (P lt; 0.05). Conclusion In CKD patients with long-term peritoneal dialysis, peritoneal function tends to decline initially and then improve. nPCR can serve as a nutritional indicator for evaluating dialysis adequacy.
【Key words】 Peritoneal dialysis; Peritoneal function; Normalized protein catabolic rate; Dialysis adequacy; Dialysis duration
慢性腎臟病(chronic kidney disease,CKD)影
響全球約10%的人口[1],被視為一項全球性健康挑戰。腹膜透析作為CKD患者的一種腎臟替代治療的方法,具有生活質量較高、費用相對較低以及對心功能、殘腎功能影響較小等優勢[2]。隨著腹膜透析技術的日益成熟,長期接受腹膜透析的患者人數逐年增加,其腹膜功能的長期變化成為臨床醫師的關注焦點。有研究表明,腹膜透析患者的5年生存率優于血液透析患者,尤其是在前2年的腎臟替代治療中[3],然而隨著透析時間的延長,腹膜功能逐漸減退,進而影響透析充分性。……