BACKGROUND Anastomotic leaks remain one of the most dreaded complications in gastrointestinal surgery causing significant morbidity,that negatively affect the patients’quality of life.Experimental studies play an imp...BACKGROUND Anastomotic leaks remain one of the most dreaded complications in gastrointestinal surgery causing significant morbidity,that negatively affect the patients’quality of life.Experimental studies play an important role in understanding the pathophysiological background of anastomotic healing and there are still many fields that require further investigation.Knowledge drawn from these studies can lead to interventions or techniques that can reduce the risk of anastomotic leak in patients with high-risk features.Despite the advances in experimental protocols and techniques,designing a high-quality study is still challenging for the investigators as there is a plethora of different models used.AIM To review current state of the art for experimental protocols in high-risk anastomosis in rats.METHODS This systematic review was performed according to The Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines.To identify eligible studies,a comprehensive literature search was performed in the electronic databases PubMed(MEDLINE)and Scopus,covering the period from conception until 18 October 2023.RESULTS From our search strategy 102 studies were included and were categorized based on the mechanism used to create a high-risk anastomosis.Methods of assessing anastomotic healing were extracted and were individually appraised.CONCLUSION Anastomotic healing studies have evolved over the last decades,but the findings are yet to be translated into human studies.There is a need for high-quality,well-designed studies that will help to the better understanding of the pathophysiology of anastomotic healing and the effects of various interventions.展开更多
BACKGROUND Hepatectomy with inflow occlusion results in ischemia-reperfusion injury;however,pharmacological preconditioning can prevent such injury and optimize the postoperative recovery of hepatectomized patients.Th...BACKGROUND Hepatectomy with inflow occlusion results in ischemia-reperfusion injury;however,pharmacological preconditioning can prevent such injury and optimize the postoperative recovery of hepatectomized patients.The normal inflammatory response after a hepatectomy involves increased expression of metalloproteinases,which may signal pathologic hepatic tissue reformation.AIM To investigate the effect of desflurane preconditioning on these inflammatory indices in patients with inflow occlusion undergoing hepatectomy.METHODS This is a single-center,prospective,randomized controlled trial conducted at the 4th Department of Surgery of the Medical School of Aristotle University of Thessaloniki,between August 2016 and December 2017.Forty-six patients were randomized to either the desflurane treatment group for pharmacological preconditioning(by replacement of propofol with desflurane,administered 30 min before induction of ischemia)or the control group for standard intravenous propofol.The primary endpoint of expression levels of matrix metalloproteinases and their inhibitors was determined preoperatively and at 30 min posthepatic reperfusion.The secondary endpoints of neutrophil infiltration,coagulation profile,activity of antithrombin III(AT III),protein C(PC),protein S and biochemical markers of liver function were determined for 5 d postoperatively and compared between the groups.RESULTS The desflurane treatment group showed significantly increased levels of tissue inhibitor of metalloproteinases 1 and 2,significantly decreased levels of matrix metalloproteinases 2 and 9,decreased neutrophil infiltration,and less profound changes in the coagulation profile.During the 5-d postoperative period,all patients showed significantly decreased activity of AT III,PC and protein S(vs baseline values,P<0.05).The activity of AT III and PC differed significantly between the two groups from postoperative day 1 to postoperative day 5(P<0.05),showing a moderate drop in activity of AT III and PC in the desflurane treatment group and a dramatic drop in the control group.Compared to the control group,the desflurane treatment group also had significantly lower international normalized ratio values on all postoperative days(P<0.005)and lower serum glutamic oxaloacetic transaminase and serum glutamic pyruvic transaminase values on postoperative days 2 and 3(P<0.05).Total length of stay was significantly less in the desflurane group(P=0.009).CONCLUSION Desflurane preconditioning can lessen the inflammatory response related to ischemia-reperfusion injury and may shorten length of hospitalization.展开更多
Neuroendocrine tumors represent a heterogeneous group of neoplasms that arise from neuroendocrine cells and secrete various peptides and bioamines. While gastrointestinal neuroendocrine tumors,commonly called carcinoi...Neuroendocrine tumors represent a heterogeneous group of neoplasms that arise from neuroendocrine cells and secrete various peptides and bioamines. While gastrointestinal neuroendocrine tumors,commonly called carcinoids,account for about 2/3 of all neuroendocrine tumors,they are relatively rare. Small intestine neuroendocrine tumors originate from intestinal enterochromaffin cells and represent about 1/4 of small intestine neoplasms. They can be asymptomatic or cause nonspecific symptoms,which usually leads to a delayed diagnosis. Imaging modalities can aid diagnosis and surgery remains the mainstay of treatment. We present a case of a jejunal neuroendocrine tumor that caused nonspecific symptoms for about 1 year before manifesting with acute mesenteric ischemia. Abdominal X-rays revealed pneumatosis intestinalis and an abdominal ultrasound and computed tomography confirmed the diagnosis. The patient was submitted to segmental enterectomy. Histopathological study demonstrated a neuroendocrine tumor with perineural and arterial infiltration and lymph node metastasis. The postoperative course was uneventful and the patient denied any adjuvant treatment.展开更多
Purpose: To report a rare case of visual allesthesia in a patient with glioblastoma multiforme. Material - Methods : A 46 – year old male presented in emergency ophthalmologic department complaining for difficulties ...Purpose: To report a rare case of visual allesthesia in a patient with glioblastoma multiforme. Material - Methods : A 46 – year old male presented in emergency ophthalmologic department complaining for difficulties in performing tasks related to color discrimination in his occupation (PC technician). The patient underwent a thorough ophthalmological examination and then he was referred to the neurological department for further evaluation. Results: The patient presented an atypical pattern of color perception disturbance. His best corrected visual acuity decreased progressively during hospitalization. He also experienced visual allesthesia paroxysmally (illusory left homonymous transpositions of subjects viewed in the right homonymous visual field). The visual field evaluation revealed homonymous left hemianopsia. Magnetic resonance imaging revealed glioblastoma multiforme confirmed by biopsy. Conclusions: A thorough ophthalmological and neuro-imaging control is suggested in patients with sudden color perception disturbance. Patients with temporal or occipital cortex damage may experience visual allesthesia.展开更多
文摘BACKGROUND Anastomotic leaks remain one of the most dreaded complications in gastrointestinal surgery causing significant morbidity,that negatively affect the patients’quality of life.Experimental studies play an important role in understanding the pathophysiological background of anastomotic healing and there are still many fields that require further investigation.Knowledge drawn from these studies can lead to interventions or techniques that can reduce the risk of anastomotic leak in patients with high-risk features.Despite the advances in experimental protocols and techniques,designing a high-quality study is still challenging for the investigators as there is a plethora of different models used.AIM To review current state of the art for experimental protocols in high-risk anastomosis in rats.METHODS This systematic review was performed according to The Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines.To identify eligible studies,a comprehensive literature search was performed in the electronic databases PubMed(MEDLINE)and Scopus,covering the period from conception until 18 October 2023.RESULTS From our search strategy 102 studies were included and were categorized based on the mechanism used to create a high-risk anastomosis.Methods of assessing anastomotic healing were extracted and were individually appraised.CONCLUSION Anastomotic healing studies have evolved over the last decades,but the findings are yet to be translated into human studies.There is a need for high-quality,well-designed studies that will help to the better understanding of the pathophysiology of anastomotic healing and the effects of various interventions.
文摘BACKGROUND Hepatectomy with inflow occlusion results in ischemia-reperfusion injury;however,pharmacological preconditioning can prevent such injury and optimize the postoperative recovery of hepatectomized patients.The normal inflammatory response after a hepatectomy involves increased expression of metalloproteinases,which may signal pathologic hepatic tissue reformation.AIM To investigate the effect of desflurane preconditioning on these inflammatory indices in patients with inflow occlusion undergoing hepatectomy.METHODS This is a single-center,prospective,randomized controlled trial conducted at the 4th Department of Surgery of the Medical School of Aristotle University of Thessaloniki,between August 2016 and December 2017.Forty-six patients were randomized to either the desflurane treatment group for pharmacological preconditioning(by replacement of propofol with desflurane,administered 30 min before induction of ischemia)or the control group for standard intravenous propofol.The primary endpoint of expression levels of matrix metalloproteinases and their inhibitors was determined preoperatively and at 30 min posthepatic reperfusion.The secondary endpoints of neutrophil infiltration,coagulation profile,activity of antithrombin III(AT III),protein C(PC),protein S and biochemical markers of liver function were determined for 5 d postoperatively and compared between the groups.RESULTS The desflurane treatment group showed significantly increased levels of tissue inhibitor of metalloproteinases 1 and 2,significantly decreased levels of matrix metalloproteinases 2 and 9,decreased neutrophil infiltration,and less profound changes in the coagulation profile.During the 5-d postoperative period,all patients showed significantly decreased activity of AT III,PC and protein S(vs baseline values,P<0.05).The activity of AT III and PC differed significantly between the two groups from postoperative day 1 to postoperative day 5(P<0.05),showing a moderate drop in activity of AT III and PC in the desflurane treatment group and a dramatic drop in the control group.Compared to the control group,the desflurane treatment group also had significantly lower international normalized ratio values on all postoperative days(P<0.005)and lower serum glutamic oxaloacetic transaminase and serum glutamic pyruvic transaminase values on postoperative days 2 and 3(P<0.05).Total length of stay was significantly less in the desflurane group(P=0.009).CONCLUSION Desflurane preconditioning can lessen the inflammatory response related to ischemia-reperfusion injury and may shorten length of hospitalization.
文摘Neuroendocrine tumors represent a heterogeneous group of neoplasms that arise from neuroendocrine cells and secrete various peptides and bioamines. While gastrointestinal neuroendocrine tumors,commonly called carcinoids,account for about 2/3 of all neuroendocrine tumors,they are relatively rare. Small intestine neuroendocrine tumors originate from intestinal enterochromaffin cells and represent about 1/4 of small intestine neoplasms. They can be asymptomatic or cause nonspecific symptoms,which usually leads to a delayed diagnosis. Imaging modalities can aid diagnosis and surgery remains the mainstay of treatment. We present a case of a jejunal neuroendocrine tumor that caused nonspecific symptoms for about 1 year before manifesting with acute mesenteric ischemia. Abdominal X-rays revealed pneumatosis intestinalis and an abdominal ultrasound and computed tomography confirmed the diagnosis. The patient was submitted to segmental enterectomy. Histopathological study demonstrated a neuroendocrine tumor with perineural and arterial infiltration and lymph node metastasis. The postoperative course was uneventful and the patient denied any adjuvant treatment.
文摘Purpose: To report a rare case of visual allesthesia in a patient with glioblastoma multiforme. Material - Methods : A 46 – year old male presented in emergency ophthalmologic department complaining for difficulties in performing tasks related to color discrimination in his occupation (PC technician). The patient underwent a thorough ophthalmological examination and then he was referred to the neurological department for further evaluation. Results: The patient presented an atypical pattern of color perception disturbance. His best corrected visual acuity decreased progressively during hospitalization. He also experienced visual allesthesia paroxysmally (illusory left homonymous transpositions of subjects viewed in the right homonymous visual field). The visual field evaluation revealed homonymous left hemianopsia. Magnetic resonance imaging revealed glioblastoma multiforme confirmed by biopsy. Conclusions: A thorough ophthalmological and neuro-imaging control is suggested in patients with sudden color perception disturbance. Patients with temporal or occipital cortex damage may experience visual allesthesia.
