Acute Mesenteric Ischemia: A Challenging Diagnostic Disease—Four Cases Reports and Literature Review (AMI)

Acute Mesenteric Ischemia (A.M.I.) is a potentially life-threatening condition syndrome due to inadequate or completely absent blood supply through superior or inferior mesenteric artery. The etiologies are various. Early diagnosis is essential to improve the clinical outcome. Despite advances in knowledge of pathophysiology, laboratory diagnosis and imaging techniques, acute intestinal ischemia is still associated with mortality rates.

Acute arterial mesenteric ischemia and reperfusion:Macroscopic and MRI findings, preliminary report

AIM:To explore the physiopathology and magnetic resonance imaging(MRI)findings in an animal model of acute arterial mesenteric ischemia(AAMI)with and without reperfusion.METHODS:In this study,8 adult Sprague-Dawley rats underwent superior mesenteric artery(SMA)ligation and were then randomly divided in two groups of 4.In groupⅠ,the ischemia was maintained for 8 h.In groupⅡ,1-h after SMA occlusion,the ligation was removed by cutting the thread fixed on the back of the animal,and reperfusion was monitored for 8 h.MRI was performed using a 7-T system.RESULTS:We found that,in the case of AAMI without reperfusion,spastic reflex ileus,hypotonic reflex ileus,free abdominal fluid and bowel wall thinning are present from the second hour,and bowel wall hyperintensity in T2-W sequences are present from the fourth hour.The reperfusion model shows the presence of early bowel wall hyperintensity in T2-W sequences after 1 h and bowel wall thickening from the second hour.CONCLUSION:Our study has shown that MRI can assess pathological changes that occur in the small bowel and distinguish between the presence and absence of reperfusion after induced acute arterial ischemia.

Acute mesenteric ischemia after cardio-pulmonary bypass surgery

Acute mesenteric ischemia (AMI) is a highly-lethal surgical emergency. Several pathophysiologic events (arterial obstruction, venous thrombosis and diffuse vasospasm) lead to a sudden decrease in mesenteric blood flow. Ischemia/reperfusion syndrome of the intestine is responsible for systemic abnormalities, leading to multi-organ failure and death. Early diagnosis is difficult because the clinical presentation is subtle, and the biological and radiological diagnostic tools lack sensitivity and specificity. Therapeutic options vary from conservative resuscitation, medical treatment, endovascular techniques and surgical resection and revascularization. A high index of suspicion is required for diagnosis, and prompt treatment is the only hope of reducing the mortality rate. Studies are in progress to provide more accurate diagnostic tools for early diagnosis. AMI can complicate the post-operative course of patients following cardio-pulmonary bypass (CPB). Several factors contribute to the systemic hypo-perfusion state, which is the most frequent pathophysiologic event. In this particular setting, the clinical presentation of AMI can be misleading, while the laboratory and radiological diagnostic tests often produce inconclusive results. The management strategies are controversial, but early treatment is critical for saving lives. Based on the experience of our team, we consider prompt exploratory laparotomy, irrespective of the results of the diagnostic tests, isthe only way to provide objective assessment and adequate treatment, leading to dramatic reduction in the mortality rate.

Planned second-look laparoscopy in the management of acute mesenteric ischemia

AIM： To investigate the role of second-look laparoscopy in patients with acute mesenteric ischemia （AMI）. METHODS： Between January 2000 and November 2005, 71 patients were operated for the treatment of AMI. The indications for a second-look were low flow state, bowel resection and anastomosis or mesenteric thromboembolectomy performed during the first operation. Regardless of the clinical course of patients, the second-look laparoscopic examination was performed 72 h post-operatively at the bed side in the ICU or operating room. RESULTS： The average time of admission to the hospital after the initation of syrnptoms was 3 d （range, 5 h-9 d）. In 14 patients, laparotomy was performed. In 11 patients, small and/or large bowel necrosis was detected and initial resection and anastomosis were conducted. A low flow state was observed in two patients and superior mesenteric artery thromboembolectomy with small bowel resection was performed in one patient. In 13 patients, a second-look laparoscopic examination revealed normal bowel viability, but in one patient, intestinal necrosis was detected. In two of the patients, a third operation was necessary to correct anastomotic leakage. The overall complication rate was 42.8%, and in-hospital mortality rate was 57.1% （n = 6）. CONCLUSION： Second-look laparoscopy is a minimally invasive, technically simple procedure that is performed for diagnostic as well as therapeutic purposes. The simplicity and ease of this method may encourage wider application to benefit more patients. However, the timing of a second-look procedure is unclear particularly in a patient with anastomosis.

Multidisciplinary management of acute mesenteric ischemia:Surgery and endovascular intervention

Acute mesenteric ischemia(AMI)is a rare cause of the“acute abdomen”,characterized by impaired blood flow to the intestine.The principle of treatment is restoration of perfusion to ischemic bowel and resection of any necrotic intestine.Surgery and endovascular intervention are two complementary approaches to mesenteric ischemia.Endovascular intervention is not an alternative to the surgical approach,but it has the potential to improve the prognosis of patients with AMI when judiciously combined with a surgical approach.Due to the need for emergent treatment of patients with acute mesenteric ischemia,the treatment strategy needs to be modified for each facility.This review aims to highlight cutting-edge studies and provide reasonable treatment strategies for patients with acute mesenteric ischemia based on available evidence.

Acute mesenteric ischemia due to percutaneous coronary intervention:A case report

BACKGROUND Percutaneous coronary intervention(PCI) is extensively used to treat acute coronary syndromes(ACS).Acute mesenteric ischemia is a life-threatening disease if untreated.CASE SUMMARY An 81-year-old female presented with 3 d of lethargy and 1 d of dyspnea.On November 16,2021,the patient developed a coma.Her oxygen saturation dropped to 70%-80%,the patient was admitted to the intensive care unit for further treatment.Chest computed tomography(CT) showed chronic bronchitis,emphysema,and multiple lung infections.Abdominal CT scan showed no obvious abnormalities,but have severely calcified abdominal vessels.The patient received assisted ventilation,and vasoactive,and anti-infection drugs.Troponin level was elevated.Since the patient was in a coma,it could not be determined whether she had chest pain.The cardiologist assumed that the patient had developed ACS;therefore,the patient underwent PCI via the left femoral artery approach,and no obvious abnormalities were found in the left and right coronary arteries.On the second postoperative day,the patient presented with abdominal distension and decreased bowel sounds;constipation was considered and a glycerin enema was administered.On day 4,the patient suddenly lost consciousness,and had decreased blood pressure,abdominal wall swelling with increased tension,and absence of bowel sounds.An urgent abdominal CT scan revealed gas in her hepatic portal system with extensive bowel wall necrosis.The patient died on day 5 due to intractable shock.CONCLUSION The potential serious complications in patients undergoing PCI,especially the patients who are hemodynamically unstable and have severely calcified abdominal vessels,should all be considered.

Should we perform decompressive laparotomy during severe acute pancreatitis with intra-abdominal hypertension below 25 mmHg:Only the gut knows

We suggest that during severe acute pancreatitis(SAP)with intra-abdominal hypertension,practitioners should consider decompressive laparotomy,even with intra-abdominal pressure(IAP)below 25 mmHg.Indeed,in this setting,non-occlusive mesenteric ischemia(NOMI)may occur even with IAP below this cutoff and lead to transmural necrosis if abdominal perfusion pressure is not promptly restored.We report our experience of 18 critically ill patients with SAP having undergone decompressive laparotomy of which one third had NOMI while IAP was mostly below 25 mmHg.

Surgical management of peritonitis secondary to acute superior mesenteric artery occlusion

Diagnosis of acute arterial mesenteric ischemia in the early stages is now possible using modern computed tomography with intravenous contrast enhancement and imaging in the arterial and/or portal phase.Most patients have acute superior mesenteric artery(SMA)occlusion,and a large proportion of these patients will develop peritonitis prior to mesenteric revascularization,and explorative laparotomy will therefore be necessary to evaluate the extent and severity of intestinal ischemia,and to perform bowel resections.The establishment of a hybrid operating room in vascular units in hospitals is most important to be able to perform successful intestinal revascularization.This review outlines current frontline surgical strategies to improve survival and minimize bowel morbidity in patients with peritonitis secondary to acute SMA occlusion.Explorative laparotomy needs to be performed first.Curative treatment is based upon intestinal revascularization followed by bowel resection.If no vascular imaging has been carried out,SMA angiography is performed.In case of embolic occlusion of the SMA,open embolectomy is performed followed by angiography.In case of thrombotic occlusion,the occlusive lesion can be recanalized retrograde from an exposed SMA,the guidewire snared from either the femoral or brachial artery,and stented with standard devices from these access sites.Bowel resections and sometimes gall bladder removal due to transmural infarctions are performed at initial laparotomy,leaving definitive bowel reconstructions to a planned second look laparotomy,according to the principles of damage control surgery.Patients with peritonitis secondary to acute SMA occlusion should be managed by both the general and vascular surgeon,and a hybrid revascularization approach is of utmost importance to improve outcomes.

Nomogram for predicting transmural bowel infarction in patients with acute superior mesenteric venous thrombosis

BACKGROUND The prognosis of acute mesenteric ischemia(AMI)caused by superior mesenteric venous thrombosis(SMVT)remains undetermined and early detection of transmural bowel infarction(TBI)is crucial.The predisposition to develop TBI is of clinical concern,which can lead to fatal sepsis with hemodynamic instability and multi-organ failure.Early resection of necrotic bowel could improve the prognosis of AMI,however,accurate prediction of TBI remains a challenge for clinicians.When determining the eligibility for explorative laparotomy,the underlying risk factors for bowel infarction should be fully evaluated.AIM To develop and externally validate a nomogram for prediction of TBI in patients with acute SMVT.METHODS Consecutive data from 207 acute SMVT patients at the Wuhan Tongji Hospital and 89 patients at the Guangzhou Nanfang Hospital between July 2005 and December 2018 were included in this study.They were grouped as training and external validation cohort.The 207 cases(training cohort)from Tongji Hospital were divided into TBI and reversible intestinal ischemia groups based on the final therapeutic outcomes.Univariate and multivariate logistic regression analyses were conducted to identify independent risk factors for TBI using the training data,and a nomogram was subsequently developed.The performance of the nomogram was evaluated with respect to discrimination,calibration,and clinical usefulness in the training and external validation cohort.RESULTS Univariate and multivariate logistic regression analyses identified the following independent prognostic factors associated with TBI in the training cohort:The decreased bowel wall enhancement(OR=6.37,P<0.001),rebound tenderness(OR=7.14,P<0.001),serum lactate levels>2 mmol/L(OR=3.14,P=0.009)and previous history of deep venous thrombosis(OR=6.37,P<0.001).Incorporating these four factors,the nomogram achieved good calibration in the training set[area under the receiver operator characteristic curve(AUC)0.860;95%CI:0.771-0.925]and the external validation set(AUC 0.851;95%CI:0.796-0.897).The positive and negative predictive values(95%CIs)of the nomogram were calculated,resulting in positive predictive values of 54.55%(40.07%-68.29%)and 53.85%(43.66%-63.72%)and negative predictive values of 93.33%(82.14%-97.71%)and 92.24%(85.91%-95.86%)for the training and validation cohorts,respectively.Based on the nomogram,patients who had a Nomo-score of more than 90 were considered to have high risk for TBI.Decision curve analysis indicated that the nomogram was clinically useful.CONCLUSION The nomogram achieved an optimal prediction of TBI in patients with AMI.Using the model,the risk for an individual patient inclined to TBI can be assessed,thus providing a rational therapeutic choice.

Predictors of irreversible intestinal resection in patients with acute mesenteric venous thrombosis

BACKGROUND Acute mesenteric venous thrombosis(AMVT)can cause a poor prognosis.Prompt transcatheter thrombolysis(TT)can achieve early mesenteric revascularization.However,irreversible intestinal ischemia still occurs and the mechanism is still unclear.AIM To evaluate the clinical outcomes of and to identify predictive factors for irreversible intestinal ischemia requiring surgical resection in AMVT patients treated by TT.METHODS The records of consecutive patients with AMVT treated by TT from January 2010 to October 2017 were retrospectively analyzed.We compared patients who required resection of irreversible intestinal ischemia to patients who did not require.RESULTS Among 58 patients,prompt TT was carried out 28.5 h after admission.A total of 42(72.4%)patients underwent arteriovenous combined thrombolysis,and 16(27.6%)underwent arterial thrombolysis alone.The overall 30-d mortality rate was 8.6%.Irreversible intestinal ischemia was indicated in 32(55.2%)patients,who had a higher 30-d mortality and a longer in-hospital stay than patients without resection.The significant independent predictors of irreversible intestinal ischemia were Acute Physiology and Chronic Health Evaluation(APACHE)II score(odds ratio=2.368,95% confidence interval:1.047-5.357,P=0.038)and leukocytosis(odds ratio=2.058,95% confidence interval:1.085-3.903,P=0.027).Using the receiver operating characteristic curve,the cutoff values of the APACHE II score and leukocytosis for predicting the onset of irreversible intestinal ischemia were calculated to be 8.5 and 12×10^9/L,respectively.CONCLUSION Prompt TT could achieve a favorable outcome in AMVT patients.High APACHE II score and leukocytosis can significantly predict the occurrence of irreversible intestinal ischemia.Therefore,close monitoring of these factors may help with the early identification of patients with irreversible intestinal ischemia,in whom ultimately surgical resection is required,before the initiation of TT.

Challenges in diagnosing mesenteric ischemia

Early identification of acute mesenteric ischemia (AMI) is challenging. The wide variability in clinical presentation challenges providers to make an early accurate diagnosis. Despite major diagnostic and treatment advances over the past decades, mortality remains high. Arterial embolus and superior mesenteric artery thrombosis are common causes of AMI. Non-occlusive causes are less common, but vasculitis may be important, especially in younger people. Because of the unclear clinical presentation and non-specific laboratory findings, low clinical suspicion may lead to loss of valuable time. During this diagnostic delay, progression of ischemia to transmural bowel infarction with peritonitis and septicemia may further worsen patient outcomes. Several diagnostic modalities are used to assess possible AMI. Multi-detector row computed tomographic angiography is the current gold standard. Although computed tomographic angiography leads to an accurate diagnosis in many cases, early detection is a persistent problem. Because early diagnosis is vital to commence treatment, new diagnostic strategies are needed. A non-invasive simple biochemical test would be ideal to increase clinical suspicion of AMI and would improve patient selection for radiographic evaluation. Thus, AMI could be diagnosed earlier with follow-up computed tomographic angiography or high spatial magnetic resonance imaging. Experimental in vitro and in vivo studies show promise for alpha glutathione S transferase and intestinal fatty acid binding protein as markers for AMI. Future research must confirm the clinical utility of these biochemical markers in the diagnosis of mesenteric ischemia.

Mesenteric ischemia:Pathogenesis and challengingdiagnostic and therapeutic modalities

Mesenteric ischemia(MI) is an uncommon medical condition with high mortality rates. ΜΙ includes inadequate blood supply, inflammatory injury and eventually necrosis of the bowel wall. The disease can be divided into acute and chronic MI(CMI), with the first being subdivided into four categories. Therefore, acute MI(AMI) can occur as a result of arterial embolism, arterial thrombosis, mesenteric venous thrombosis and nonocclusive causes. Bowel damage is in proportion to the mesenteric blood flow decrease and may vary from minimum lesions, due to reversible ischemia, to transmural injury, with subsequent necrosis and perforation. CMI is associated to diffuse atherosclerotic disease in more than 95% of cases, with all major mesenteric arteries presenting stenosis or occlusion. Because of a lack of specific signs or due to its sometime quiet presentation, this condition is frequently diagnosed only at an advanced stage. Computed tomography(CT) imaging and CT angiography contribute to differential diagnosis and management of AMI. Angiography is also the criterion standard for CMI, with mesenteric duplex ultrasonography and magnetic resonance angiography also being of great importance. Therapeutic approach of MI includes both medical and surgical treatment. Surgical procedures include restoration of the blood flow with arteriotomy, endarterectomy or anterograde bypass, while resection of necrotic bowel is always implemented. The aim of this review was to evaluate the results of surgical treatment for MI and to present the recent literature in order to provide an update on the current concepts of surgical management of the disease. Mesh words selected include MI, diagnostic approach and therapeutic management.

Mesenteric ischemia in COVID-19 patients:A review of current literature

BACKGROUND Coronavirus disease 2019(COVID-19)virus has affected all the systems of the body,defying all impressions of it being a respiratory virus only.AIM To see the association of mesenteric ischemia with COVID-19.METHODS After initial screening and filtering of the titles on PubMed and Google Scholar,124 articles were selected.Articles were read in full,and the references were skimmed for relevance.Twenty-six articles(case reports and case series)were found to eligible for inclusion.References of these 26 articles were checked for any additional cases.Two more publications were found,and a total of 28 articles(22 case reports and 6 case series)have been included for review in this manuscript.RESULTS A total of 41 cases of acute mesenteric ischemia in COVID-19 patients have been reported in the literature since the outbreak of this pandemic.Most of them include patients with comorbidities.CONCLUSION In conclusion,based on this literature review and precise published knowledge regarding acute mesenteric ischemia in patients with COVID-19,it is essential to understand its relevance in all patients with gastrointestinal symptoms.The threshold for the diagnostic investigations should also be kept low for the timely diagnosis and management of this disorder.

Tomodensitometric Aspects of Acute Intestinal Ischemia: A Prospective Study of 20 Cases

Background: Acute intestinal ischemia is an abdominal suffering occasioned by a sudden reduction of mesenteric blood circulation. It is a rare and potentially serious medical-surgical emergency, deadly in 50% to 100% of cases. Diagnosis is known to be difficult at the early stage during which a well-conducted treatment may help reduce mortality. Multi-detector scanners were assessed to be far more sensitive and appropriate for the diagnosis of mesenteric ischemia than angiography. Objective: Study the tomodensitometric aspects of acute intestinal ischemia, and the traps of late diagnosis, in order to optimize the care and improve the prognosis of this disease. Patients and Methods: This is a prospective, longitudinal and descriptive study covering a period of nine (9) months. We have included all cases of acute intestinal ischemia. Results: Twenty (20) cases of acute intestinal ischemia were registered i.e. a frequency of 2.2 cases per month. The average age of the patients was 67.8 years with 0.7 as sex ratio. Abdominal pain was noted in all cases. History of cardiovascular disease was found in seven (7) cases. Abdominal angioscan was performed in fifteen (15) cases. There was a suspected diagnosis upon request in ten (10) cases. The main intestinal lesions were the lack of parietal enhancement (13 cases) and parietal thickening (12 cases). There were sixteen (16) cases of acute mesenteric ischemia and four (4) cases of ischemic colitis. The acute mesenteric ischemia was arterial in eleven (11) cases, venous in two (2) cases and mixed in two (2) cases. Diagnosis was made at the stage of intestinal infarction in eleven (11) cases. Ten (10) patients were operated and 10 others were treated medically. Thirteen (13) cases of death were registered. Conclusion: Acute intestinal ischemia is a rare but serious disease. Abdominal pain is the main ground for consultation. Diagnosis is often late and focuses on abdominal CT angiography. An early diagnosis could help improve its prognosis.

Severe Klebsiella pneumoniae pneumonia complicated by acute intra-abdominal multiple arterial thrombosis and bacterial embolism:A case report

BACKGROUND Klebsiella pneumoniae(K.pneumoniae)is a clinically common Gram-negative bacillus that can cause community-and hospital-acquired infections and lead to pneumonia,liver abscesses,bloodstream infections,and other infectious diseases;however,severe pneumonia caused by hypervirulent K.pneumoniae(hv Kp)complicated by acute intra-abdominal multiple arterial thrombosis and bacterial embolism is rarely seen in the clinical setting and has not been reported in the literature.CASE SUMMARY A 51-year-old man was hospitalized with fever and dyspnea.Persistent mild pain in the middle and upper abdomen began at dawn on the 3rd day following admission and developed into persistent severe pain in the left upper abdomen 8h later.Based on chest computed tomography(CT),bronchoscopy,bronchoalveolar lavage fluid metagenomic next-generation sequencing,abdominal aortic CT angiography(CTA),and culture of the superior mesenteric artery embolus,adult community-acquired severe hv Kp pneumonia complicated by acute intraabdominal multiple arterial thrombosis and bacterial embolism was diagnosed.Notably,he recovered and was discharged from the hospital after receiving effective meropenem anti-infection,endovascular contact thrombolytic,and systemic anticoagulant therapies and undergoing percutaneous thrombus aspiration.Ten days later,the patient returned to the hospital for abdominal CTA examination,which indicated blocked initial common pathway of the celiac trunk and superior mesenteric artery,and local stenosis.Therefore,celiac trunk artery stenting was performed in Chongqing Hospital,and postoperative recovery was good.CONCLUSION We report a case of hv Kp severe pneumonia complicated by acute intra-abdominal multiple arterial thrombosis and bacterial embolism and suggest that clinicians should consider the possibility of a Gram-negative bacillus infection and conduct effective pathogen detection in a timely fashion when managing patients with severe community-acquired pneumonia before obtaining bacteriologic and drug sensitivity results.At the same time,when patients have severe pulmonary infection complicated by severe abdominal pain,an acute mesenteric artery embolism should be considered to avoid delays in treatment.

急性肠系膜缺血血管内治疗的研究进展

虽然急性肠系膜缺血(AMI)的发生率较低,但其致死率较高。AMI的常见分型包括急性肠系膜上动脉栓塞、急性肠系膜上动脉血栓形成和急性肠系膜静脉血栓形成。目前,血管内治疗是AMI的有效治疗策略之一,针对不同类型的AMI可选择不同的血管内治疗方式,包括血管内机械取栓、动脉内置管溶栓及联合策略。本文针对近些年AMI血管内治疗的相关进展进行综述,并分析存在的问题。

AngioJet Ultra机械血栓清除系统在早期急性肠系膜上动脉缺血性疾病中应用效果的多中心研究

目的探讨AngioJet Ultra机械性血栓清除系统治疗早期急性肠系膜上动脉缺血(AMI)的临床效果。方法回顾性分析4家医院2017年3月至2022年9月收治的49例AMI患者资料。患者入院后明确诊断,急诊行AngioJet Ultra系统实施肠系膜上动脉血栓清除,术后观察其临床疗效、安全性及6、12、24、36、48个月随访情况。结果所有患者均顺利完成血栓清除术治疗,技术成功率100.0%,残余狭窄11例,给予球囊扩张成形术,支架置入8例,其中2例肠系膜上动脉夹层,遂置入2枚支架,余36例术后复查造影示肠系膜上动脉血栓清除满意。46例术后腹痛均缓解,2例腹痛加重,并行急诊行剖腹探查术,术后恢复可,1例术后死于多器官功能衰竭,术后9例出现血红蛋白尿,24 h后均恢复正常。术后6~48个月随访,1例失访,2例死亡,1例术后16个月停用华法林钠片复发,1例术后36个月出现肠系膜上动脉重度狭窄,行药物球囊扩张成形术。结论AngioJet Ultra机械性血栓清除系统治疗AMI方法临床效果满意,微创、安全性良好,可作为早期AMI的腔内介入治疗首选方案。

电针内关穴对AMI大鼠自主神经与中枢P物质、一氧化氮合酶的影响

目的:探讨电针大鼠内关穴抗急性心肌缺血(AMI)损伤的自主神经效应路径和可能的有效物质。方法:SD大鼠随机分为正常组(A组)、模型对照组(B组)、电针内关组(C组),每组6只。各组分离颈部右侧迷走神经、左侧交感神经,BL-420E+生理仪记录放电情况。B、C组Pit股静脉注射制作AMI模型,C组造模后5min电针左侧内关穴治疗。最后免疫组化ABC法、NADPH-黄递酶组化法分别检测各组大鼠下丘脑室旁核(PVN)、延髓迷走神经复合区及脊髓(C8-T2)外侧角的P物质(SP)和一氧化氮合酶(NOS)的表达。观测各组大鼠心交感神经、迷走神经放电频率变化以及治疗前后自主神经SP、NOS灰度值。结果:造模前A、B、C组迷走神经放电频率分别为(5.12±0.67)、(5.13±0.36)、(5.05±0.47)次/min,交感神经放电频率分别为(23.21±3.23)、(22.84±2.18)、(23.04±4.32)次/min,组间比较均无差异;造模后0min时B、C组迷走神经放电频率增加、交感神经放电频率减少,与A组比较有显著差异(P<0.05);造模后20minC组迷走神经和交感神经放电频率恢复明显,与A组比较均无差异,与B组比较均有差异(P<0.05)。A组PVN、延髓迷走神经复合区、脊髓(C8-T2)外侧角的SP灰度值分别为(115.44±12.20)、(84.64±14.50)、(43.32±12.14),NOS灰度值分别为(98.03±14.72)、(64.60±12.33)、(40.33±10.42),B组各部位SP灰度值小于A组,组间有差异性(P<0.05),C组各部位SP灰度值均高于A、B组,组间比较有差异性(P<0.05);B组各部位NOS灰度值增加(P<0.05),C与A组各部位NOS灰度值无明显差异。结论:电针内关穴对AMI大鼠的保护效应与自主神经及中枢SP、NOS的协调作用密切相关。

AMI患者血清IMA、BNP和cTnT检测的临床应用

目的:探讨了急性心肌梗死(AMI)患者治疗前后血清IMA、BNP、cTnT水平的变化及临床意义。方法:应用电化学发光法和生化法对32例AMI患者进行了治疗前后血清IMA、BNP、cTnT检测。并与35例正常健康人作比较。结果:AMI患者在治疗前血清IMA、BNP、cTnT水平均非常显著地高于正常人组(P<0.01)。经中西医结合治疗2周后则与正常人组比较无显著性差异(P>0.05)。且血清IMA水平与BNP、cTnT水平呈显著正相关(r=0.5784、0.6132,P<0.01)。结论:检测AMI患者血清IMA、BNP和cTnT水平的变化及了解病情、观察疗效和预后判断均具有重要的临床价值。

血清生物学标志物在急性肠系膜缺血性疾病早期诊断中的研究进展

急性肠系膜缺血性疾病(acute mesenteric ischemia,AMI)是临床上一种十分危急且高死亡率的腹部急症。由于该病的临床症状和体征通常缺乏特异性,患者确诊时病情往往已进展至肠管并发生不可逆性坏死,最终导致临床病死率居高不下。近年来,尽管随着CT血管造影、数字减影血管造影等成像技术的发展使得AMI在诊断上具有更高的敏感度和特异度,但这是一种有创性检查并且通常需要经验丰富的放射科医师来解释检查结果。因此,寻找能够早期精确诊断AMI的客观、便捷、特异性的血清生物学标志物,对降低AMI病死率至关重要。本文总结国内外关于诊断AMI的经典、新型及其他血清生物标志物,为AMI的早期诊断提供依据。