高容量血液滤过治疗脓毒症并发多器官功能障碍综合征RIFLE标准应用研究

目的探讨RIFLE标准衡量高容量血液滤过(HVHF)治疗脓毒症并发多器官功能障碍综合征(MODS)的治疗时机及其对预后的影响。方法回顾性分析成都军区总医院2006年1月至2010年12月行HVHF治疗的脓毒症并发MODS患者52例,采用RIFLE标准分A组(AKIⅠ期)、B组(AKIⅡ期)和C组(AKIⅢ期),比较各组的病死率、平均ICU住院时间、平均机械通气时间、平均连续血液滤过治疗时间,并将HVHF治疗前和治疗24 h后的APACHEⅡ评分、SOFA评分、血浆白介素(IL)-6、氧合指数、血肌酐(Scr)及平均动脉压(MAP)等指标。结果 (1)C组HVHF治疗前APACHEⅡ评分、SOFA评分、血浆IL-6及病死率均明显高于A、B组(P<0.01);(2)A、B组HVHF治疗前APACHEⅡ评分、SOFA评分及病死率比较差异无统计学意义(P>0.05),但B组HVHF治疗前IL-6及平均ICU住院时间、平均机械通气时间、平均连续血液滤过治疗时间明显高于或长于A组(P<0.01);(3)HVHF治疗24 h后血浆IL-6、氧合指数、Scr、MAP均明显改善,但C组IL-6仍高于A、B组(P<0.01),B组IL-6仍高于A组(P<0.01);A、B组HVHF治疗24 h后APACHEⅡ评分、SOFA评分显著降低(P<0.01),C组无变化(P>0.05)。结论 HVHF能有效辅助治疗脓毒症并发MODS;RIFLE标准及IL-6对判断预后有指导意义;早期(AKIⅠ期和Ⅱ期)行HVHF可明显改善脓毒症并发MODS的预后,而AKIⅠ期行HVHF的疗效更好。     

高容量血液滤过在脓毒症并发多器官功能障碍综合征中的应用

目的：探讨高容量血液滤过（HVHF）对脓毒症并发多器官功能障碍综合征（MODS）的疗效。方法：回顾性分析HVHF治疗的39例脓毒症并发MODS患者,对比分析死亡组和存活组的血浆IL-6,并比较HVHF治疗前和治疗24h后血肌酐（Cr）、尿素氮（BUN）、氧合指数、乳酸、平均动脉压（MAP）、APACHEⅡ评分。结果：经HVHF治疗后2组血浆IL-6均明显降低（P〈0.01）,但HVHF治疗前、后死亡组IL-6均明显高于存活组（P〈0.01）。经HVHF治疗24h后2组Cr、BUN、氧合指数、乳酸、MAP均明显改善（P〈0.01）;存活组APACHEⅡ评分显著降低（P〈0.01）。结论：HVHF可有效辅助治疗脓毒症并发MODS,有效清除血浆IL-6。     

配对血浆滤过吸附治疗脓毒症合并多器官功能障碍综合征的临床研究

目的比较高容量血液滤过(HVHF)与配对血浆滤过吸附(CPFA)治疗脓毒症并多器官功能障碍综合征(MODS)及老年多器官功能衰竭(multiple organ failure in the elderly,MOFE)的临床疗效。方法选择脓毒症并MODS的患者14例,随机分为HVHF治疗组及CPFA治疗组,在常规治疗基础上分别予HVHF或CPFA治疗10 h,观察两种方式治疗前后的血流动力学、电解质及酸碱平衡、急性生理学及慢性健康状况评分Ⅱ(acute physiologyand chronic health evaluationⅡ,APACHEⅡ)及序贯器官衰竭估计评分(SOFA)、短期存活率等变化。结果 (1)两种治疗均能降低血尿素氮、肌酐水平,维持电解质、酸碱平衡,对白细胞、血小板、血细胞比容无明显影响。(2)CPFA治疗后氧合指数(PaO2/FiO2)明显改善(P0.05)、平均动脉压(MAP)明显升高(P0.05)、SOFA评分及APACHEⅡ评分均明显下降(P0.05);而HVHF治疗后仅见SOFA评分明显下降(P0.05),PaO2/FiO2、MAP、及APACHEⅡ评分均无明显改变(P0.05)。(3)两种方法治疗过程中均未出现出血、栓塞、过敏等并发症,老年患者耐受性好。(4)治疗7 d后HVHF组4例存活,CPFA组6例存活。结论 HVHF和CPFA治疗对脓毒症合并MODS及MOFE患者均有一定临床疗效,且后者更具优势。     

Early recognition of abdominal compartment syndrome in patients with acute pancreatitis

AIM： To assess the value of widely used clinical scores in the early identification of acute pancreatitis （AP） patients who are likely to suffer from intra-abdominal hypertension （IAH） and abdominal compartment syndrome （ACS）.
METHODS： Patients （η = 44） with AP recruited in this study were divided into two groups （ACS and non-ACS） according to intra-abdominal pressure （IAP） determined by indirect measurement using the transvesical route via Foley bladder catheter. On admission and at regular intervals, the severity of the AP and presence of organ dysfunction were assessed utilizing different multifactorial prognostic systems： Glasgow-Imrie score, Acute Physiology and Chronic Health Evaluation Ⅱ （APACHE-Ⅱ） score, and Multiorgan Dysfunction Score （MODS）. The diagnostic performance of scores predicting ACS development, cut-off values and specificity and sensitivity were established using receiver operating characteristic （ROC） curve analysis.
RESULTS： The incidence of ACS in our study population was 19.35%. IAP at admission in the ACS group was 22.0 （18.5-25.0） mmHg and 9.25 （3.0-12.4） mmHg in the non-ACS group （P 〈 0.01）. Univariate statistical analysis revealed that patients in the ACS group had significantly higher multifactorial clinical scores （APACHE Ⅱ, Glasgow-Imrie and MODS） on admission and higher maximal scores during hospitalization （P 〈 0.01）. ROC curve analysis revealed that APACHE Ⅱ, Glasgow-Imrie, and MODS are valuable tools for early prediction of ACS with high sensitivity and specificity, and that cut-off values are similar to those used for stratification of patients with severe acute pancreatitis （SAP）.
CONCLUSION： IAH and ACS are rare findings in patients with mild AR Based on the results of our study we recommend measuring the IAP in cases when patients present with SAP （APACHE Ⅱ 〉 7; MODS 〉 2 or Glasgow-Imrie score 〉 3）.     

早期高容量血液滤过持续时间对重症急性胰腺炎急性肺损伤影响研究

目的 研究早期高容量血液滤过(HVHF)持续时间对重症急性胰腺炎(SAP)急性肺损伤(ALI)的影响.方法 将2006年8月到2009年4月怀化市第三人民医院ICU收治的49例入院时合并ALI急性呼吸窘迫综合征(ARDS)并在72 h内接受HVHF治疗的SAP患者随机分为两组.在常规治疗的基础上分别接受血滤持续时间8 h(Ⅰ组)和72 h(Ⅱ组)治疗.比较两组患者的APACHEⅡ评分、氧合指数、ALI/ARDS的改善率(包括治愈率)、机械通气的例数及时间、急性期并发症、HVHF相关并发症、结局及医疗费用等.结果 ①氧合指数及APACHEⅡ评分:两组入院第3天和第14天均较入院当天有所改善(P＜0.05).但在人院第3天和第14天,两组患者差异无统计学意义.②ALI、ARDS的改善率(包括治愈率):两组入院第3天和第14天较入院当天升高(P＜0.05);但在入院第3天和第14天.两组患者差异无统计学意义.③两组患者急性期机械通气的例数及时间、急性期并发症(多器官功能障碍综合征、急性肾功能衰竭、腹腔室隔综合征、导管相关感染、低血压)差异无统计学意义,但医疗费用差异有统计学意义(P＜0.05).两组患者急性期均无死亡.结论 发病72 h内的SAP早期短时(8 h)持续性HVHF治疗能有效促进合并ALI/ARDS的SAP患者肺功能的恢复,并且节约医疗费用.     

Clinical characteristics and management of patients with early acute severe pancreatitis： Experience from a medical center in China

AIM: To study clinical characteristics and management of patients with early severe acute pancreatitis (ESAP). METHODS: Data of 297 patients with severe acute pancreatitis (SAP) admitted to our hospital within 72 h after onset of symptoms from January 1991 to June 2003 were reviewed for the occurrence and development of early severe acute pancreatitis (ESAP). ESAP was defined as presence of organ dysfunction within 72 h after onset of symptoms. Sixty-nine patients had ESAP, 228 patients without organ dysfunction within 72 h after onset of symptoms had SAP. The clinical characteristics, incidence of organ dysfunction during hospitalization and prognosis between ESAP and SAP were compared. RESULTS: Impairment degree of pancreas (Balthazar CT class) in ESAP was more serious than that in SAP (5.31+/-0.68 vs 3.68+/-0.29, P<0.01). ESAP had a higher mortality than SAP (43.4% vs 2.6%, P<0.01), and a higher incidence of hypoxemia (85.5% vs 25%, P<0.01), pancreas infection (15.9% vs 7.5%, P<0.05), abdominal compartment syndrome (ACS) (78.3% vs 23.2%, P<0.01) and multiple organ dysfunction syndrome (MODS)(78.3% vs 10.1%, P<0.01). In multiple logistic regression analysis, the main predisposing factors to ESAP were higher APACHE II score, Balthazar CT class, MODS and hypoxemia. CONCLUSION: ESAP is characterised by MODS, severe pathological changes of pancreas, early hypoxemia and abdominal compartment syndrome. Given the poor prognosis of ESAP, these patients should be treated in specialized intensive care units with special measures such as close supervision, fluid resuscitation, improvement of hypoxemia, reduction of pancreatic secretion, elimination of inflammatory mediators, prevention and treatment of pancreatic infections.     

Cardiovagal response to acute mild exercise in young healthy subjects.

BACKGROUND: The aim of the present study was to investigate the effect of a single bout of mild exercise on autonomic nervous system activity in healthy subjects. METHODS AND RESULTS: The study group comprised 18 healthy males, aged between 20 and 24 years, who had not been training regularly for the last 3 months. A supine recording of systolic arterial pressure (SAP) and RR interval and the administration of the phenylephrine test were performed at baseline and repeated after a 60-min recovery period following treadmill exercise training for 30 min at 65% of maximal heart rate. Mean SAP and RR interval, heart rate variability (HRV) indices (the standard deviation of normal-to-normal RR intervals (SDNN), the square root of the mean of squared differences between successive intervals and the percentage of adjacent RR intervals differing more than 50 ms), noninvasive spectral baroreflex sensitivity (Spe-BRS) and phenylephrine baroreflex sensitivity (Phe-BRS) were assessed before and after training. Mean SAP measured after exercise was lower than baseline (120+/-12 mmHg vs 128+/-12 mmHg, p = 0.05). Spe-BRS and Phe-BRS increased significantly after exercise, from 11.8+/-6.1 ms/mmHg to 16.0+/-7.8 ms/mmHg (p = 0.034), and from 16.0+/-8.8 ms/mmHg to 21.9+/-9.3 ms/mmHg (p = 0.022), respectively. A parallel increase was also observed in SDNN (from 81+/-44 ms to 96+/-53 ms, p = 0.02), but the other HRV indices showed no significant differences between pre- and post-exercise. CONCLUSIONS: A single session of mild exercise performed by sedentary young men leads to significant autonomic nervous system improvement, which suggests that even mild physical activity is beneficial for neural cardiac regulation and should be recommended to sedentary healthy subjects.     

Role of Heart Rate Variability in Predicting the Severity of Severe Acute Pancreatitis

Background

Infected pancreatic necrosis (IPN) and multiple organ dysfunction syndrome (MODS) are major complications of acute pancreatitis which determine disease severity and outcome.

Aims

The aim of this study is to investigate the value of admission heart rate variability as a marker of IPN or MODS in severe acute pancreatitis (SAP) patients.

Methods

Forty-one SAP patients within 72 h of symptoms onset were included in this prospective observational study. General demographics, laboratory data and the acute physiology and chronic health evaluation (APACHE) II scores were recorded at admission. 5-minute ECG signals were obtained at the same time for heart rate variability analyses to assess SAP severity.

Results

The baseline heart rate variability measurements, levels of low frequency/high frequency (LF/HF) were significantly lower whereas high frequency norm (nHF) levels were significantly higher in patients who present with IPN and MODS or died (P < 0.01). Low frequency (LF) levels were lower in patients who present with IPN or MODS as compared to patients without these complications. Levels of low frequency norm (nLF) were lower in MODS and non-survival patients. nHF and LF/HF were good predictors of IPN and MODS, superior to procalcitonin. nHF and LF/HF were better than APACHE II in predicting IPN and LF/HF showed superiority over APACHE II in the prediction of MODS.

Conclusions

Admission heart rate variability is a good marker of IPN and MODS in SAP patients.     

Adjunctive continuous high-volume hemofiltration in acute severe pancreatitis patients: A retrospective study

Abstract

Objective. To evaluate the efficacy of continuous high-volume hemofiltration for the treatment of severe acute pancreatitis patients and the impact of acute physiology and chronic health evaluation (APACHE) II score on the efficacy of high-volume hemofiltration. Material and methods. A total of 63 patients diagnosed with severe acute pancreatitis between January 2005 and July 2007 were retrospectively analyzed: 34 accepted adjunctive continuous high-volume hemofiltration (HVHF group); and 29 only accepted conventional recommended treatments (control group). Results. There were no differences in physiological characteristics between the two groups when entering the intensive care unit. After treatment, the percentages of patients successfully weaned from mechanical ventilation (p = 0.004) and who experienced renal function recovery (p = 0.046) were significantly higher in the HVHF group than in the control group. The 28-day survival rate was 91.2% in the HVHF group, compared with 65.5% in the control group (p = 0.014). For patients with APACHE II scores > 15, survival was significant higher in the HVHF group than in the control group (87.5% vs 50%; p = 0.044). No difference in survival was found in patients with APACHE II scores ≤ 15 between the two groups (94.4% vs 76.5%; p = 0.177). After HVHF therapy, APACHE II score, body temperature, urine volume and laboratory indices, including serum creatinine, base excess and blood calcium, were significantly improved. Conclusions. Adjunctive continuous HVHF was beneficial for the survival of severe acute pancreatitis patients. Survival improvement was significant in patients with APACHE II score > 15.     

Hemodynamic and antianginal effects during rest and exercise of intravenous isradipine, a new dihydropyridine calcium antagonist

In an open randomized study, hemodynamic and antianginal effects of nifedipine and the new dihydropyridine derivative isradipine were compared in patients with stable, angiographically confirmed coronary heart disease. Right heart hemodynamics, systemic arterial blood pressure, ECG, and drug plasma concentrations were measured before medication at rest and exercise, after infusions of increasing doses at rest, and again after treatment at rest and exercise. A linear relationship between serum concentrations and cumulated dosages was obtained for both drugs. At rest, both drugs significantly increased cardiac output and heart rate. The reduction of arterial blood pressure was significantly greater after isradipine (systolic from 148 +/- 3 to 104 +/- 3 mmHg; diastolic from 90 +/- 4 to 58 +/- 2 mmHg) than after nifedipine (systolic 149 +/- 6 to 125 +/- 4 mmHg; diastolic 92 +/- 4 to 76 +/- 3 mmHg). The minimal effective plasma level of isradipine regarding blood pressure reduction was estimated at 5 ng/ml (nifedipine: 10-25 ng/ml). During exercise both medications significantly reduced mean pulmonary artery pressure (isradipine: 40 +/- 3 to 20 +/- 1 mmHg, nifedipine: 37 +/- 4 to 22 +/- 1 mmHg), pulmonary artery wedge pressure (isradipine: 23 +/- 3 to 10 +/- 1 mmHg, nifedipine 24 +/- 3 to 14 +/- 1 mmHg), and diastolic arterial pressure (isradipine: 103 +/- 3 to 73 +/- 4 mmHg, nifedipine: 99 +/- 3 to 91 +/- 2 mmHg), whereas systolic pressure was reduced by only isradipine (189 +/- 4 to 147 +/- 5 mmHg). Neither medication significantly changed electrocardiographic ST depression during exercise.(ABSTRACT TRUNCATED AT 250 WORDS)     

Formalized therapeutic guideline for hyperlipidemic severe acute pancreatitis

AIM: To investigate a formalized therapeutic guideline for hyperlipidemic severe acute pancreatitis (HL-SAP).METHODS: Thirty-two consecutive patients with severe acute pancreatitis were included in the clinical trial. All of them met the following five criteria for admission to the study, namely the Atlanta classification and stratification system for the clinical diagnosis of SAP, APACHEII score more than 8, time interval for therapeutic intervention less than 72 hours after onset of the disease, serum triglyceride (TG) level 6.8 mmol/l or over, and exdusion of other etiologies.They were divided into severe acute pancreatitis group (SAP,22 patients) and fulminant severe acute pancreatitis group (FSAP, 10 patients). Besides the conventional therapeutic measures, Penta-association therapywas also applied in the two groups, which consisted of blood purification (adsorption of triglyceride and hemofiltration), antihyperlipidemic agents (fluvastatin or lipanthyl), low molecular weight heparin (fragmin), insulin, topical application of Pixiao (a traditional Chinese medicine) over the whole abdomen, serum triglyceride,pro-inflammatory cytokines and anti-inflammatory cytokines were determined before blood purification (PF), at the end of blood purification (AFE) and on the 7th day after onset of the disease (AF7) respectively. Simultaneously, severity of the diseases was assessed by the APACHE Ⅱ system.Prognosis was evaluated by non-operation cure rate,absorption rate of pseudocyst, time interval pseudocyst absorption, hospital stay and survival rate.RESULTS: Serum triglyceride level (mmol/L), TNFα (U/mi) concentration and APACHE Ⅱ score were significantly decreased (P＜0.05) at AFE and AF7, as compared with PF.However, serum IL-10 concentration (pg/ml) was increased significantly (P＜0.001) at AFE, and decreased significantly (P＜0.05) at AF7 when compared with PF. Operations: The First surgical intervention time was 55.8±42.6 days in SAP group (5 patients) and 12.2±6.6 days in FSAP group (7 patients),there was a significant difference between the two groups (P=0.02). The number of operations in the two groups was 1.33±0.5 vs3.5±1.2 (P=0.0037), respectively. Prognosis: Nonoperation cure rate, absorption rate of pseudocyst, hospital stay and survival rate in SAP group and FSAP group were 100 % (22/22) vs11.1% (1/9), 77.3 % (17/22) vs 11.1%(1/9), 54.2±35.9 vs99.1±49.5 days (P=0.008) and 100 %(22/22) vs66.7 % (6/9) (P=0.0044). The time for absorption of pseudocyst was 135.1±137.5 days in SAP group.CONCLUSION: Penta-association therapy is an effective guideline in the treatment of hyperlipidemic severe acute pancreatitis at its early stage (within 72 hours).     

Effect of admission hypertriglyceridemia on the episodes of severe acute pancreatitis

AIM： To investigate the effect of admission hypertriglyceridemia （HTG） on the episodes of severe acute pancreatitis （SAP）.
METHODS： One hundred and seventy-six patients with SAP were divided into HTG group （n = 45） and control group （n = 131） according to admission triglyceride （TG） ≥ 5.65 mmol/L and 〈 5.65 retool/L, respectively. Demographics, etiology, underlying diseases, biochemical parameters, Ranson＇ s score, acute physiology and chronic heath evaluation Ⅱ （APACHE Ⅱ） score, Balthazar＇s computed tomography （CT） score, complications and mortality were compared. Correlation between admission TG and 24-h APACHE Ⅱ score was analyzed.
RESULTS： SAP patients with HTG were younger （40.8 ± 9.3 years vs 52.6 ± 13.4 years, P 〈 0.05） with higher etiology rate of overeating, high-fat diet （40.0% vs 14.5%, P 〈 0.05） and alcohol abuse （46.7% vs 23.7%, P 〈 0.01）, incidence rate of hypocalcemia （86.7% vs 63.4%, P 〈 0.01） and hypoalbuminemia （84.4% vs 60.3%, P 〈 0.01）, 24-h APACHE Ⅱ score （13.6 ± 5.7 vs 10.7 ± 4.6, P 〈 0.01） and admission serum glucose （17.7 ± 7.7 vs 13.4 ± 6.1, P 〈 0.01）, complication rate of renal failure （51.1% vs 16.8%, P 〈 0.01）, shock （37.9% vs 14.5%, P 〈 0.01） and infection （37.4% vs 18.3%, P 〈 0.01） and mortality （13.1% vs 9.1%, P 〈 0.01）. Logistic regression analysis showed a positive correlation between admission TG and 24-h APACHE Ⅱ score （r = 0.509, P = 0.004）.
CONCLUSION： The clinical features of SAP patients with HTG are largely consistent with previous studies, HTG aggravates the episodes of SAP.     

Abdominal compartment syndrome in patients with severe acute pancreatitis in early stage

AIM： To study retrospectively the influence of intra-abdominal hypertension （IAH） and abdominal compartment syndrome （ACS） in patients with early acute pancreatitis （AP） （during the first week after admission） on physiological functions, and the association of the presence of IAH/ACS and outcome.
METHODS： Patients （n = 74） with AP recruited in this study were divided into two groups according to intra-abdominal pressure （IAP） determined by indirect measurement using the transvesical route via Foley bladder catheter during the first week after admission. Patients （n = 44） with IAP ≥ 12 mmHg were assigned in IAH group, and the remaining patients （n = 30） with IAP 〈 12 mmHg in normal IAP group. For analysis of the influence of IAH/ACS on organ function and outcome, the physiological parameters and the occurrence of organ dysfunction during intensive care unit （ICU） stay were recorded, as were the incidences of pancreatic infection and in-hospital mortality.
RESULTS： IAH within the first week after admission was found in 44 patients （59.46%）. Although the APACHE Ⅱ scores on admission and the Ranson scores within 48 h after hospitalization were elevated in IAH patients in early stage, they did not show the statistically significant differences from patients with normal IAP within a week after admission （16.18 ± 3.90 vs 15.70 ± 4.25, P = 0.616; 3.70 ± 0.93 vs 3.47 ± 0.94, P = 0.285, respectively）. ACS in early AP was recorded in 20 patients （27.03%）. During any 24-h period of the first week after admission, the recorded mean IAP correlated significantly with the Marshall score calculated at the same time interval in IAH group （r = 0.635, P 〈 0.001）. Although ACS patients had obvious amelioration in physiological variables within 24 h after decompression, the incidences of pancreatitic infection, septic shock, multiple organ dysfunction syndrome （MODS） and death in the patients with ACS were significantly higher than that in other patients wit     

Oral sildenafil improves primary pulmonary hypertension refractory to epoprostenol.

BACKGROUND: Epoprostenol (prostaglandin I(2)) has become recognized as a therapeutic breakthrough that can improve hemodynamics and survival in patients with primary pulmonary hypertension (PPH). However, a significant number of patients have PPH that is refractory to epoprostenol, and lung transplantation has been the only remaining treatment option. METHODS AND RESULTS: The study subjects included 20 consecutive patients with PPH (mean pulmonary arterial pressure: 65+/-15 mmHg) who had received epoprostenol for more than 12 months. The patients were divided into 2 groups; responders and non-responders. In the non-responders, New York Heart Association (NYHA) functional class did not improve and mean right atrial pressure (mRA) increased to 8 mmHg or more, and additional sildenafil, a phosphodiesterase-5 inhibitor, was started. Six patients were included in the non-responders, whose mRA was 9+/-5 mmHg before and significantly increased to 13+/-3 mmHg after epoprostenol administration (p < 0.05). One patient died and the other 5 patients received oral sildenafil. The mRA of 12+/-4 mmHg (value before sildenafil) improved to 8+/-5 mmHg after sildenafil administration. Three patients were classified in the NYHA functional class 4 and improved to class 3, and 2 patients were in class 3 and remained in the same class after the addition of sildenafil. CONCLUSIONS: In patients with severe PPH refractory to epoprostenol treatment, additional oral sildenafil can improve pulmonary hemodynamics and symptoms. The combination therapy of epoprostenol and sildenafil is a new medical treatment to attempt before progressing to lung transplantation for patients with PPH refractory to epoprostenol.     

Clinical Effects of Pulse High‐Volume Hemofiltration on Severe Acute Pancreatitis Complicated With Multiple Organ Dysfunction Syndrome

To evaluate the effects of pulse high‐volume hemofiltration (PHVHF) on severe acute pancreatitis (SAP) with multiple organ dysfunction syndrome (MODS). Thirty patients were divided into two groups: PHVHF group and continuous venovenous hemofiltration (CVVH) group. They were evaluated in terms of clinical symptoms, acute physiology and chronic health evaluation (APACHE) II score, sequential organ failure assessment (SOFA) score, simplified acute physiology (SAPS) II score and biochemical changes. The levels of IL‐6, IL‐10 and TNF‐α in plasma were assessed by ELISA before and after treatment. The doses of dopamine used in shock patients were also analyzed. In the two groups, symptoms were markedly improved after treatment. Body temperature (BT), breath rate (BR), heart rate (HR), APACHE II score, SOFA score, SAPS II score, serum amylase, white blood cell count and C‐reactive protein were decreased after hemofiltration (P < 0.05). The PHVHF group was superior to the CVVH group, especially in APACHE II score, CRP (P < 0.01), HR, temperature, SOFA score and SAPS II score (P < 0.05). The doses of dopamine for shock patients were also decreased in the two groups (P < 0.05), with more reduction in the PHVHF group than the CVVH group (P < 0.05). The levels of IL‐6, IL‐10 and TNF‐α decreased (P < 0.05) in the PHVHF group more significantly than the CVVH group (P < 0.01). PHVHF appears to be superior to CVVH in the treatment of SAP with MODS.     

The effects of oxygen and vasodilators on pulmonary hemodynamics and blood gases in chronic lung disease]

The effects of oxygen inhalation, nitroglycerin (NTG) and prostaglandin E1 (PGE1) on pulmonary hemodynamics and blood gases were studied in 15 patients with chronic lung disease (CLD). Cardiac catheterization was performed with Swan-Ganz catheter, and pulmonary hemodynamics and cardiac output were measured. After baseline hemodynamics and blood gas measurements were made, 15 patients inhaled oxygen for 15 minutes and the same measurements were repeated. Twenty minutes later, oxygen inhalation was stopped. Then the 15 patients were divided into two groups; one group was administered sublingual NTG (7 patients) and the other was administered PGE1 by continuous intravenous infusion (8 patients). Pulmonary hemodynamics and blood gas measurements were then performed. Oxygen inhalation significantly reduced mean pulmonary artery pressure (from 22.2 +/- 8.8 to 20.0 +/- 6.4 mmHg; p < 0.01) and heart rate (from 78.1 +/- 12.0 to 75.5 +/- 12.5 beats/min; p < 0.05). With respect to oxygenation, oxygen inhalation significantly increased PaO2 (from 68.6 +/- 10.7 to 113.4 +/- 31.4 mmHg; p < 0.01), PvO2 (from 35.1 +/- 3.7 to 38.0 +/- 3.3 mmHg; p < 0.01). Therefore, oxygen inhalation was thought to be useful in patients with chronic lung disease with pulmonary hypertension. Sublingual administration of NTG significantly reduced mean pulmonary artery pressure (from 24.1 +/- 0.2 to 17.6 +/- 6.8 mmHg; p < 0.01), C.I. (from 2.9 +/- 0.2 to 2.3 +/- 0.2 ml/min/m; p < 0.01), O2-transport (from 589.1 +/- 168.4 to 457.0 +/- 105.8 ml/min; p < 0.01), and had a tendency to decrease PvO2 (from 34.3 +/- 3.0 to 32.1 +/- 1.8 mmHg; p < 0.1).(ABSTRACT TRUNCATED AT 250 WORDS)     

The significance of heart rate for stress hemodynamics following heart transplantation

Since 1985, orthotopic heart transplantation had been carried out in 20 patients. Seventeen patients are still alive. 341 +/- 156 days after cardiac transplantation hemodynamics at rest were normalized. Left ventricular ejection fraction at rest and during exercise was within normal ranges for all patients except one. During symptom-limited bicycle exercise (121 +/- 35 Watt), pulmonary capillary wedge pressure (PCP) and right atrial pressure (RAP) increased to unphysiological high levels (PCP: 8.2 +/- 2.7 mmHg at rest, 19.1 +/- 4.9 mmHg at exercise; RAP: 4.1 +/- 2.3 mmHg at rest, 12.1 +/- 3.9 mmHg at exercise), whereas cardiac index was elevated to a normal level (3.6 l/min.m2 at rest; 6.9 l/min.m2 at exercise). Increase in heart rate, however, was subnormal (from 90 +/- 13/min at rest to 122 +/- 15/min at exercise). To examine the influence of heart rate on hemodynamics, in 8 patients with normal tricuspid valve function, heart rate was gradually increased by atrial stimulation during continuous exercise; PCP maximally could be reduced from 19.1 +/- 4 mmHg to 10.8 +/- 2.7 mmHg (p less than 0.01) at an optimum heart rate of 139 +/- 9/min. Reduction of RAP was by far less pronounced and normalization could not be achieved (from 12.2 +/- 3.7 mmHg to 9.5 +/- 3.4 mmHg, p less than 0.01), suggesting an impaired right ventricular function. By atrial stimulation stroke volume was reduced from 109.8 +/- 17.7 ml to 91.8 +/- 14.2 ml (p less than 0.01). These results indicate that, at exercise, the denervated transplanted heart, to a large extent, increases cardiac output by means of the Frank-Starling mechanism.(ABSTRACT TRUNCATED AT 250 WORDS)     

连续静脉-静脉血液滤过对多脏器功能障碍综合征血流动力学的影响

目的 :探讨连续静脉 静脉血液滤过对多脏器功能障碍综合征 (MODS)患者血流动力学的影响。方法 :选择MODS患者 19例 ,应用连续静脉 静脉血液滤过 (CVVH)进行治疗 ,治疗期间用Swan Ganz漂浮导管监测血流动力学变化。结果 :与CVVH前比较 ,CVVH治疗后 ,体血管阻力指数明显改善 ,平均动脉压回升 ,心率下降 ,肺动脉楔压也明显降低。结论 :CVVH可改善MODS患者的全身血流动力学状况 ,提高患者的氧供 ,但对氧摄取率无明显影响     

Continuous veno-venous haemofiltration in the treatment of severe acute pancreatitis: 6-year experience

Background. Continuous veno-venous haemofiltration (CVVH) could be reasonable for attenuation of systemic complications in severe acute pancreatitis (SAP). The aim of the study was implementation and feasibility assessment of the CVVH in the treatment protocol of SAP. Patients and methods. CVVH was applied to 111 SAP patients during 2000–2005. APACHE II, systemic inflammatory response syndrome (SIRS), multiple organ dysfunction syndrome (MODS), serum lipase, C-reactive protein (CRP), complication rate and main outcomes were analysed comparing two periods. Results. Overall, 39 patients corresponded to Balthazar grade E SAP and 72 patients to necrotizing SAP (NSAP), with an average APACHE II score of 7 and 8.5, respectively, on admission. CVVH was started within 48 h in 82% of patients. Duration of CVVH was significantly augmented in NSAP patients during the routine period, comprising 92 h (p=0.006). The clinical presentation of SIRS and MODS was similar in both periods, with more initial pulmonary dysfunctions in NSAP (p=0.048). Peripancreatic infection decreased in the routine period; surgical interventions were performed in 34.8% vs 72.4% of patients. Hospital stay comprised on average 15.9 days for grade E SAP and 29.4 days for NSAP in the routine period, with overall mortality of 10.26% and 30.5%, respectively. Discussion. Application of CVVH in the treatment protocol of SAP is obscure due to relative invasiveness, a poorly understood mechanism of action and scarce clinical experience. We conclude that early pre-emptive application of CVVH is safe and feasible in the treatment of SAP. Duration of the procedure seems to be essential. Randomized clinical trials are justified. Our results are in favour of clinical application of CVVH in the treatment of SAP.     

Usefulness of physical maneuvers for prevention of vasovagal syncope.

BACKGROUND: It is known that approximately two-thirds of patients with vasovagal syncope have prodromal symptoms and when these start, physical maneuvers that can increase venous return may abort the syncopal attack. The aims of this study were to evaluate the effects of 3 physical maneuvers, squatting, leg-crossing with muscle tensing, and handgrip, on improving hemodynamic status, and to compare the effect of each on aborting or preventing vasovagal syncope. METHODS AND RESULTS: Of 50 patients who underwent the head-up tilt test (HUT) to evaluate syncope, 27 patients with positive HUT were classified as group I (14 men, 13 women; mean age 44.5+/-15.3 years), 23 patients with negative HUT were classified as group II (13 men, 10 women; mean age 41.2 +/-16.7 years), and 21 normal subjects were classified as group III (10 men, 11 women; mean age 28.6+/-6.3 years). The effects of the physical maneuvers were evaluated in 21 patients from group I who underwent a repeat HUT 1 week after the initial test. Leg-crossing significantly increased systolic blood pressure (SBP) in all 3 groups (8.0+/-5.8 mmHg in group I, 7.0+/-8.5 mmHg in group II, 8.7+/-5.7 mmHg in group III; p < 0.05), but not diastolic blood pressure (DBP). Squatting significantly increased SBP and DBP in all 3 groups (7.1 +/-5.1, 4.6+/-5.8 mmHg in group I, 7.8+/-5.9, 4.3+/-4.7 mmHg in group II, 6.5+/-5.0, 3.7+/-3.9 mmHg in group III; p < 0.05). However, handgrip did not exert any significant influence on the hemodynamics in any group nor did heart rate change significantly during the physical maneuvers in any group. During the repeat HUT, prodromal symptoms with hypotension developed in 13 of the 21 patients and of these 5 fainted immediately after and were not able to do the physical maneuvers. Squatting and leg-crossing aborted syncope in 7 of 8 patients, but handgrip aborted syncope in only 1 patient. CONCLUSION: Squatting and leg-crossing with muscle tensing improved the hemodynamics of normal subjects as well as those of patients with vasovagal syncope. Squatting and leg-crossing can be used as a simple and effective preventive maneuver in patients with vasovagal syncope.