慢性阻塞性肺疾病肺康复相关进展与运动心肺功能的应用

慢性阻塞性肺疾病患者,特别是老年患者.运动耐力下降是其主要症状之一,不但严重影响了患者的生活质量,同时带来了沉重的社会家庭经济负担,随着人口老龄化的加深,这一问题愈显突出.很多国外研究已证明肺康复是改善慢性阻塞性肺疾病患者运动耐力的有效手段,且具有良好成本效益.同时越来越多的研究已将运动心肺功能作为其评估技术,并将其广泛运用到日常的诊疗活动中.目前国内对这方面的研究和应用还相对较少.本文将着重就肺康复及这一运动耐力评估方法作一综述.     

异氟烷预处理对心肺转流术后早期肺损伤的影响

Objective To observe the effects of isoflurane preconditioning against cardiopulmonary bypass (CBP)-induced early injury of lungs.Methods Sixteen patients undergone cardiac valve replacement were randomly divided into control group (group C,n =8) or isoflurane group (group I,n =8).Midazolam,fentanyl and vecuronium were used to maintain anesthesia.Isoflurane was inhaled for at least 30 min before CBP and then eluted out in group I,while only pure oxygen was inhaled in group C.Serum TNF-α,P-selectin,MDA and myeloperoxidase (MPO) were measured and respiratory index (RI,PA-aDO2/PaO2) was calculated according to blood gas analysis 10 min after anesthesia induction (T1),30 min (T2) and 180 min (T3) after vena cava opened,respectively.Before chest closure a bit of lung tissue was taken for detection of gap junction protein 43 (Cx43) and pathological examination.Results Serum TNF-α,P-selectin,MDA,MPO and RI significantly increased after CPB (T2-3) in both groups (P＜0.05-0.01),with less increasing extent in group I than in group C.There were no differences in distribution,colorful gap junction of lungs and CX43 expression in both groups.Pathological examination showed obvious edema in alveolar space,destroyed alveolar structure,severe neutrophil accumulation and erythrocyte infiltration in both groups.Conclusion Isoflurane preconditioning attenuates the oxidative stress response and lung inflammatory reaction,exerting protection of lungs against CBP-induced early injury.     

不同氧合器对体外循环心脏手术患儿中性粒细胞凋亡的影响

Objective To evaluate the effect of two kind oxygenators on polymorphonuclear neutrophil (PMN) apoptosis, and to give a method of inhibting the systemic inflammatory response syndrome(SIRS) to cardiopulmonary bypass(CPB). Methods Sixty VSD patients undergoing open heart surgery with CPB were randomly divided into two groups(n = 30): group B(bubble oxygenator), group M(membrane oxygenator). Blood samples were drawn from the central venous line before starting CPB, at the end of CPB, 4, 8 and 24 h after CPB. The PMN counts were performed by blood cell counter. PMN apoptosis and the expression of CD11b were evaluated by flow eytometry. The plasma concentration of elastase was determined by enzyme linked immunosorbent assays. Results The rates of PMN apoptosis were significantly reduced (P<0.05) and the PMN counts, the expression of CD11b and the plasma con-centration of elastase were remarkably increased after CPB(P<0.05), but at the end of CPB, 4 h and 8 h after CPB the rate of PMN apoptosis was higher in group M than that in group B. PMN counts, the expression of CDI lb and the plasma concentration of elastase were higher in group B than in group M (P<0.05). The PMN counts were higher in group B than in group M 24 h after CPB (P< 0.05). Conclusion XiJian-Ⅱ membrane oxygenator can increase PMN apoptosis and depress systemic inflammatory response better than XIJing-90 bubble oxygenator.     

Use of Hand Held Doppler to identify venous tributaries in in situ vein arterial bypass

Background: It very important to reduce the morbidity associated with arterial bypass surgery by minimizing the length of incision used in infrainguinal bypass surgery using in situ vein as a conduit. This paper describes a quick and less invasive method of identifying the location of vein tributaries using Hand Held Doppler in arterial bypass surgery with local cut down instead of extensive exposure. Methods: The technique was used in 19 consecutive procedures. Fourteen grafts were subsequently evaluated for completeness of tributary ligation using duplex scanning. Results: A mean of 2.5 tributaries were identified per limb. Thus, there were 35 patent tributaries in our cohort of 14 patients. None was of clinical significance. Four occluded spontaneously during the period of study. Wound length was reduced by 30–60% depending on the total length of the incision. Conclusion: This technique is an effective, cheap and simple means of performing bypass surgery in high‐risk patients (with significant comorbidity and a high ASA score) and also reducing inherent complications associated with the length of the incision.     

Silastic ring vertical gastric bypass: cohort study with 83% rate of 5-year follow-up

BackgroundSilastic ring vertical gastric bypass (SRVGB) with jejunal interposition is our standard operation for morbidly obese patients. We present the results of 5 years of follow-up in a cohort of patients who underwent SRVGB in 2001.MethodsThe records of all 160 consecutive patients who underwent SRVGB from January to December 2001 were reviewed. Of the 160 procedures, 143 were primary open cases, 14 were revisions from restrictive procedures, and 3 were laparoscopic cases. At 5 years, the body mass index and percentage of excess weight loss was available for 133 patients (83%) at office visits (n = 91, 68.4%), by telephone (n = 40, 30.1%), or by e-mail (n = 2, 1.5%).ResultsOf the 160 patients, 121 were women and 39 were men, with a mean age of 33.15 ± 10.0 years, percentage of ideal body weight of 195.7% ± 40.8%, and body mass index of 44.6 ± 9.3 kg/m². The mean hospital stay was 3 ± 1 days. One patient (.6%) died of a pulmonary embolus. Early complications included 3 cases (1.87%) of upper gastrointestinal bleeding and 4 gastric leaks (2.5%): 2 (1.36%) from primary cases and 2 (14.29%) from revisional cases. Late complications included 32 patients (20%) with incisional hernias, 20 (12.5%) with anemia, 14 (8.8%) with dumping, 4 (2.5%) with gastrojejunal stricture, 2 (1.25%) with intestinal obstruction, and 2 (1.25%) requiring silastic ring surgical removal. The 5-year follow-up data were available for 133 patients (83%). The mean body mass index in this group was 27 ± 5 kg/m², with a percentage of excess weight loss of 83% ± 18.3% at 5 years postoperatively.ConclusionThe results of our study have shown that SRVGB is an effective operation for promoting lasting weight loss, with acceptable mortality and complication rates.     

Brown Bowel Syndrome Secondary to Jejunoileal Bypass: The First Case Report

A 58-year-old woman with a surgical history of jejunoileal bypass in 1980 for weight reduction sought medical attention with multiple complaints. The patient had not been taking any nutritional supplements since her bypass surgery, 26 years previously. She was found to have osteomalacia, chronic diarrhea, secondary hyperparathyroidism, and hyperoxaluria with a frequent history of nephrolithiasis. Because of her severe osteodystrophy and metabolic complications, reversal of her jejunoileal bypass was recommended. Reversal of the jejunoileal bypass with a sleeve gastrectomy was performed. Laparotomy revealed brown discoloration of the entire alimentary limb with atrophy of the bypassed intestinal limb. Histologic examination of the resected small bowel demonstrated brown pigment deposits within smooth muscle cells of the bowel wall. The pigment stained positive with Fontana-Masson most likely representing lipofuscin. We report a case of brown bowel syndrome complicating jejunoileal bypass, the first case reported in the literature to the best of our knowledge.