摘要目的 了解重度烧伤患者休克期血浆B型钠尿肽(BNP)含量变化,探讨其临床意义.方法 选择笔者单位收治的伤后4 h内入院、年龄18～60岁、烧伤总面积大于或等于30%或者Ⅲ度面积大于或等于10%TBSA的患者42例,分为:烧伤A组,总面积30%～50%或者Ⅲ度10%～20%TBSA;烧伤B组:总面积大于50%或Ⅲ度大干20%TBSA.每组各21例.以同期住院的20例整形患者为对照组.检测各组患者入院时血浆BNP、肌酸激酶(CK)、心肌型肌酸激酶同工酶(CK-MB)及肌钙蛋白I(TnI)水平.测定并计算42例烧伤患者伤后8、16、24、48 h TnI、BNP及液体入量的整体水平.对其中的BNP值与液体人量作相关性分析.结果 入院时,烧伤A组患者BNP值为(68±19)ng/L,烧伤B组为(99±38)ng/L,均明显高于对照组[(17±7)ng/L,P<0.01];烧伤A、B组TnI值[(2.13±0.67)、(2.98±0.58)μg/L]亦明显高于对照组[(0.12±0.03)μg/L,P<0.01];3组患者CK、CK-MB值接近(P>0.05).42例烧伤患者伤后48 h内BNP持续增高,与液体人量呈正相关;TnI于伤后24 h达高峰,伤后48 h下降.结论 血浆BNP是反映重度烧伤后早期心肌缺血缺氧变化的敏感指标,且与早期液体复苏量呈正相关,可用于指导休克期液体复苏.

abstractsObjective To study the plasma content of B-type natriuretic peptide (BNP) in patients with severe burn during shock stage and probe its clinical significance. Methods Forty-two patients aged 18-60 years, with total burn surface area ≥30%TBSA or full-thickness burn area ≥10% TBSA, hospital-ized within 4 hours after burn, were divided into A group (with total burn surface area 30% -50% TBSA or full-thickness burn area 10% -20% TBSA, n = 21 ), and B group (with total burn surface area 50% TB-SA or full-thickness burn area > 20% TBSA, n = 21 ). Twenty patients admitted during the same time for plastic surgery were enrolled as control group. The plasma levels of BNP, creatine kinase (CK), CK-MB, troponin I (Tnl) of all patients were determined on admission. The levels of BNP, Tnl and fluid resuscita-tion volume were examined at 8, 16, 24, 48 post burn hour (PBH) in A and B groups. Analysis of correla-tion between BNP and fluid resuscitation volume was performed. Results On admission: BNP level in A group (68±19 ng/L) and B group (99±38 ng/L) , respectively, was increased as compared with that in control group (17±7 ng/L, P <0.01 ). Tnl level in A group (2.13±0.67 μg/L) and B group (2.98± 0.58μg/L), respectively, was increased as compared with that in control group (0.12 ± 0.03 μg/L, P < 0.01). There was no obvious difference in CK, CK-MB levels among A, B, and control groups ( P > 0.05). BNP levels in A, B groups continuously rose during 8 - 48 PBH, and they were positively correlated with fluid resuscitation volume. TnI level peaked at 24 PBH, and decreased at 48 PBH. Conclusions The plasma level of BNP is sensitive to reflect changes in myocardial ischemia and hypoxia as a rise in level of TnI in shock stage of severe burn, and it was positively correlated with fluid resuscitation volume. BNP can be used to guide fluid resuscitation during shock stage.