[The clinical value of radical resection of retroperitoneal lipo-lymphatic layer for pancreatic head cancer].

Objective: To investigate the clinical value of the novel approach,radical resection of the retroperitoneal lipo-lymphatic layer (RRRLLL),in the surgical treatment of resectable pancreatic head cancer. Methods: Between June 2020 and June 2022,a total of 221 patients with pancreatic head cancer underwent surgical treatment using the RRRLLL approach(RRRLLL group),while 107 patients received traditional surgical treatment(traditional group) in five high-volume pancreatic centers in China. Data from surgical technique and clinical perioperative outcomes,including lymph node harvested,surgical time,and complications,were analyzed. The RRRLLL group consisted of 144 males and 77 females with an age of (67.5±9.0) years(range:41.3 to 81.1 years). The traditional group included 71 males and 36 females,with an age of (66.3±8.1) years(range:45.1 to 79.2 years). Statistical analysis was performed using the K-S test,Z test,or χ2 test. Results: Pancreaticoduodenectomy was performed successfully in all patients,achieving R0 resection. RRRLLL group surgery required mobilization of retroperitoneal adipose and lymphatic tissues starting from the right edge of the inferior vena cava and extending to the left side,up to the superior mesenteric artery,down to the inferior mesenteric artery,and left to the left side of the aorta,including the perineural and lymphatic tissues around the superior mesenteric artery and the sheath of the mesenteric artery. However,the traditional group did not include the areas mentioned above in the scope of clearance. There were no statistically significant differences between the RRRLLL group and the traditional group in terms of age,sex,tumor size,T stage,and vascular invasion (all P>0.05). However,the number of lymph nodes harvested in the RRRLLL group was significantly higher at 28.7±9.0 (range: 18 to 39) compared to 18.2±8.0 (range: 12 to 21) in the traditional group (Z=-10.691,P<0.05). There were no statistically significant differences in the number of positive lymph nodes,N staging,and postoperative complications between the two groups. Conclusion: The RRRLLL approach improved lymph node dissection compared to the traditional approach,potentially leading to reduced recurrence rates.

[Application of membrane anatomy in hepatopancreatobiliary and splenic surgery].

Understanding of a variety of membranous structures throughout the body,such as the fascia,the serous membrane,is of great importance to surgeons. This is especially valuable in abdominal surgery. With the rise of membrane theory in recent years,membrane anatomy has been widely recognized in the treatment of abdominal tumors,especially of gastrointestinal tumors. In clinical practice. The appropriate choice of intramembranous or extramembranous anatomy is appropriate to achieve precision surgery. Based on the current research results,this article described the application of membrane anatomy in the field of hepatobiliary surgery,pancreatic surgery,and splenic surgery,with the aim of blazed the path from modest beginnings.

[The treatment strategies for complications after pancreaticoduodenectomy].

The most common complications after pancreaticoduodenectomy include pancreatic fistula, biliary fistula, delayed gastric emptying, bleeding, and abdominal infection. Although advances in surgery have led to a significant decrease in perioperative mortality in recent years, the risk of complications after pancreaticoduodenectomy remains. Thus, prevention and treatment of various complications are important to improve the prognosis of patients.

[The clinical value of terminal branches portal vein embolization for hepatocellular carcinoma with insufficient future liver remnant].

Objectives: To examine the efficacy of terminal branches portal vein embolization(TBPVE) for the increment of FLR in hepatocellular carcinoma (HCC) patients and to introduce its clinical value with transcatheter chemoembolization(TACE) in the treatment of HCC patients without surgery. Methods: One hundred and fifty HCC patients from three clinical centers of china underwent TBPVE technique from December 2016 to May 2021,including 89 males and 61 females. The average age was 51.9 years(range:18 to 79 years).One hundred and one patients were diagnosed with a background of HBV infection,including 27 patients with portal venous hypertension.TACE was performed simultaneously with TBPVE in 102 patients.Fifty-three patients underwent hepatectomy,who were subdivided into HBV positive and HBV negative groups,with TACE and without TACE groups to analyze the increment of future liver remnant (FLR), complications and survival data.These data were also analyzed in other 97 patients without hepatectomy. Results: All the patients reached adequate FLR successfully in 14 days after TBPVE including patients with portal venous hypertension.The average increment rates of FLR was 56.2% in 7 days and 57.8% in 14 days after TBPVE. There was no significant difference neither between HBV positive and HBV negative groups(7 days:(55.0±27.3)% vs.(57.8±20.9)%,t=0.885,P=0.373; 14 days:(57.3±24.6)% vs.(58.3±23.7)%;t=0.801,P=0.447),or between with TACE and without TACE groups(7 days:(62.3±26.3)% vs. (48.8±20.6)%;t=1.788,P=0.077;14 days:(64.4±25.0)% vs.(55.2±23.1)%;t=1.097,P=0.257).The morbidity and mortality rates were 20.8% and 1.9% in patients with hepatectomy.The 1-,3-year overall survival(OS) and disease-free(DFS) rates were 87.5%,64.5% and 64.7%,40.6% for patients underwent surgery.There was no significant difference of 1-,3-year OS and DFS between HBV positive and negative groups,but there were different between TACE and without TACE groups.The 1-,3-year OS for patients underwent TBPVE and TACE but without surgery were 80.1%, 53.7%. Conclusion: TBPVE is a good alternative technique for modulation of FLR for staged hepatectomy even in HBV positive HCC patients and can be applied with TACE procedure simultaneously as an option treatment for patients with no intend to surgery.

[Advance in immunotherapy on biliary tract cancers].

Biliary tract cancers(BTC),including gallbladder cancer and cholangiocarcinoma,has the characteristics of low early diagnosis rate,complex anatomy,insensitivity to radiotherapy and chemotherapy, and poor prognosis.In recent years,immunotherapy as a new method,has made great progress in the treatment of advanced malignant tumors.Immunotherapy is gradually applied in the treatment of BTC,such as inhibitory agents targeting the immune checkpoint receptor pathway,adoptive immunotherapy and tumor vaccines.

[Analysis of treatment modalities and prognosis of patients with gallbladder cancer in China from 2010 to 2017].

Objective: To evaluate the clinical characteristics and prognosis of gallbladder cancer (GBC) patients in China. Methods: This retrospective multicenter cohort study enrolled 3 528 consecutive GBC patients diagnosed between January 2010 to December 2017 in 15 hospitals from 10 provinces. There were 1 345 (38.12%) males and 2 183 (61.88%) females.The age of diagnosis was (63.7±10.8) years old (range: 26 to 99 years old) .There were 213 patients (6.04%) in stage 0 to Ⅰ, whereas 1 059 (30.02%) in stage Ⅱ to Ⅲ, 1 874 (53.12%) in stage Ⅳ, and 382 (10.83%) unavailable. Surgery was performed on 2 255 patients (63.92%) . Three hundred and thirty-six patients received chemotherapy or radiotherapy (9.52%; of which 172 were palliative); 1 101 (31.21%) received only supportive treatment.The patient source, treatment and surgery, pathology, concomitant gallstone, and prognosis were analyzed. Results: Among the 3 528 GBC patients, 959 (27.18%) were from East China, 603 (17.09%) from East-North China, 1 533 (43.45%) from Central China, and 433(12.27%) from West China. Among the 1 578 resectable tumor, 665 (42.14%) underwent radical surgery, 913 (57.86%) underwent surgery that failed to follow the guidelines.Eight hundred and ninety-one (56.46%) patients were diagnosed before surgery, 254 (16.10%) during surgery, and 381 (24.14%) after surgery (time point of diagnosis couldn't be determined in 52 patients) .Among the 1 578 patients with resectable tumor, 759 (48.10%) had concomitant gallstone.Among the 665 patients underwent radical surgery, 69 (10.4%) showed positive resection margin, 510 (76.7%) showed negative resection margin, and 86 (12.9%) unreported margin status.The 5-year overall survival rate (5yOS) for the 3 528-patient cohort was 23.0%.The 5yOS for patients with resectable tumor was 39.6%, for patients with stage ⅣB tumor without surgery was 5.4%, and for patients with stage ⅣB tumor underwent palliative surgery was 4.7%. Conclusions: More than half GBC patients in China are diagnosed in stage Ⅳ.Curative intent surgery is valuable in improving prognosis of resectable GBC.The treatment of GBC needs further standardization.Effective comprehensive treatment for GBC is in urgent need.

[The new classifications of biliary tract diseases based on actual anatomy].

In order to facilitate the treatment strategies for biliary tract injury, hilar cholangiocarcinoma, bile duct tumor thrombus, cholangiocellular carcinoma and bile duct cystic dilatation, many classifications have been made, even more than 10 types for one disease. Each type is represented by numbers or English alphabet, which are not only confusing but also difficult to remember. The Academician Mengchao Wu divided the liver into five sections and four segments base on its anatomy, this classification is very direct and visual, thus had been using till now. In order to overcome those complicated problems, it is considered to develop a new classification based on actual anatomic location similar to that for liver cancer, which is easy to remember and to directly determine the treatment strategy. All kinds of classifications have their own characteristics and advantages and disadvantages. This practical classifications avoid the complexity and may be useful for clinicians.

Correlation between peripheral skeletal muscle functions and the stable phase of COPD in older patients.

OBJECTIVE: To establish normal values for detection indexes of peripheral skeletal muscle dysfunction (quadriceps femoris) of healthy older subjects, and investigate the functional status of the peripheral skeletal muscle of patients with stable phase COPD. PATIENTS AND METHODS: Patients with stable phase COPD and healthy subjects of similar age were included. The assessments of strength and myoelectricity of the quadriceps femoris were recorded. The twitch tension of the quadriceps femoris (TwQ), quadriceps maximum voluntary contraction (QMVC), and endurance time (Tf) were measured. The multiple-parameter malnutrition index (MNI) was used for overall evaluation of the nutritional status of patients. The femoral muscle volume was estimated. All subjects were subjected to a routine pulmonary function test including indexes such as FEV1, FVC, FEV1/FVC (%), and PEF. Enzyme-linked immunoassay (ELISA) was used to measure the levels of myostatin, tumor necrosis factor-α, TNF-like apoptosis-inducing factor (TWEAK), surface active protein D (SPD), C-reactive protein (CRP), interleukin (IL)-1ß, and IL-6. The cell immunohistochemical method was used to detect the expression of nuclear factor Kappa B (NF-κB). RESULTS: There were significant differences in body weight, BMI, femoral muscle volume, and physical activity scores between the two groups (p<0.01). The MNI of patients in the COPD group was significantly higher than that in the control group (p<0.01). The QMVC of 51 male and 16 female patients decreased. All eight tested cytokines increased in the COPD group but there were only significant differences in four cytokines (p<0.05). CONCLUSIONS: Chronic systemic inflammation is a major risk factor of skeletal muscle dysfunction (SMD) in COPD patients. The levels of SPD, myostatin, TWEAK, and TNF-α decreased significantly in COPD patients.

[Clinical effect of terminal branches portal vein embolization combined with transcatheter arterial chemoembolization on liver neoplasms].

Objective: To analyze the efficacy of branches portal vein embolization (TBPVE) combined with transcatheter arterial chemoembolization (TACE) on liver neoplasms. Methods: From August 2016 to May 2017, there were 13 patients including 11 males and 2 females with primary hepatocellular carcinoma who underwent TBPVE+ TACE , among whom there were 11 cases with a history of HBV infection.Average age of the 13 patients was (60.8±6.2)years. The live function of all patients were Child-Pugh A classification.The CT or MRI images of each patient was reconstructed and the standard liver volume(SLV) before TBPVE+ TACE was (1 181.2±49.3)ml, estimated future liver remnant(FLR) was (326.1±72.1)ml and FLR/SLV was (27.6±6.0)%.The puncture site for TBPVE was determined by the three-dimensional reconstruction of portal vein.CT scan or MRI, AFP and liver function test were repeated after one and two weeks after TBPVE+ TACE.FLR and FLR/SLV were calculated respectively.Hepatectomy would be performed if the patients agreed.The postoperative complications were analyzed. Results: On the 7thday after TBPVE+ TACE, the FLR/SLV was(42.6±8.0)% and the FLR increasement was(56.0±24.6)%.The level of AFP decreased from(87.9±81.8)µg/L to (29.7±20.9)µg/L.On the 14thday after TBPVE+ TACE, the FLR/SLV was(45.8±6.2)% and the FLR increasement was(71.8±29.0)%.Four patients underwent surgery which including 2 right hepatectomies and 2 right trisegmentectomies in 2 weeks after TBPVE+ TACE.Nine patients were performed with targeting intratumoral lactic acidosis TACE (TILA-TACE). No severe complication occurred in all patients. Conclusions: TBPVE could induce a rapid growth of the liver remnant but still with the concern of inducing the growth of neoplasms at the same time.To combine TACE in TBPVE therapy not also can the growth of neoplasms be prevented but also inducing its shrinking.This method might be a new mode for the treatment of hepatocellular carcinoma.

[Method and significance of specimens standardized pathological treatment in pancreaticoduodenectomy for pancreatic head cancer].

Pancreatic ductal adenocarcinoma is a highly aggressive disease with a grim prognosis. Surgical resection offers the best chance for long-term survival. Negative-margin resection still remains the goal, the influence of margin status on outcomes in pancreatic head carcinoma remains controversial, as conflicting data have been plagued by a lack of standardization in R0 resection and margin definitions, pathologic analysis, and reporting. In contrast to common belief, a high rate of R1 resections in pancreatic cancer is not a marker of low-quality surgery but rather of high-quality pathology. The international pathological consensus of pancreatic head carcinoma is still needed to fully understand the prognostic value of margin status in order to optimize treatment strategy for this disease.

[Current status of lung transplantation in China: problems and perspectives].

Despite rapid progress, clinical lung transplantation in China still lags far behind. A great challenge remains in donor lung utilization and perioperative medicine. It's really abnormal that we are so backward in lung transplantation when we have come up with the advanced world levels in thoracic surgery, pulmonology and critical care medicine. Our shortcomings were analyzed by comparing lung transplantation in China and in the advanced countries. The first problem is multidisciplinary teamwork. In the United States, a lung transplant team includes physician specialized in lung transplantation, thoracic surgeons, nurses, respiratory therapists and other specialists possibly needed. In contrast, our lung transplant teams are derived from thoracic surgery teams. Other specialists are invited for consultation just when thoracic surgeons are unable to deal with the tough issues in perioperative medicine. The low utilization and quality of donor lung also result from poor teamwork. The second problem is that we failed to integrate such advances as extra corporeal lung support and ex vivo lung perfusion into our lung transplant programs. In conclusion, the development of lung transplantation in China is dependent upon an initiative, multidisciplinary team approach.

The immune response of turbot, Scophthalmus maximus (L.), skin to high water temperature.

The immune responses of mucus from the skin of turbot, Scophthalmus maximus, were studied in relation to changing water temperature. Groups of fish were exposed to a programmed increase of 3 °C per 48 h, until the experimental water temperatures of 16, 20, 23, 25, 27 or 28 °C were reached. After 48 h at the relevant temperature, the expressions of immune-related factors were determined, including immunoglobulin M (IgM), IL-1ß, hepcidin, transferrin, lysozyme, acid/alkaline phosphatase and superoxide dismutase using RT-PCR and spectrophotometric methods. Significant changes in mucus immunity were observed, which paralleled with those previously reported for serum in other fish species. Hence, it is suggested that the serum and mucus immune system of turbot have a similar regulatory system. This information could be useful in better understanding the role of the mucus as a component of the innate immune system.

Homogeneous modification of sugarcane bagasse cellulose with succinic anhydride using a ionic liquid as reaction medium.

The homogeneous chemical modification of sugarcane bagasse cellulose with succinic anhydride using 1-allyl-3-methylimidazolium chloride (AmimCl) ionic liquid as a reaction medium was studied. Parameters investigated included the molar ratio of succinic anhydride/anhydroglucose units in cellulose in a range from 2:1 to 14:1, reaction time (from 30 to 160min), and reaction temperature (between 60 and 110 degrees C). The succinylated cellulosic derivatives were prepared with a low degree of substitution (DS) ranging from 0.071 to 0.22. The results showed that the increase of reaction temperature, molar ratio of SA/AGU in cellulose, and reaction time led to an increase in DS of cellulose samples. The products were characterized by FT-IR and solid-state CP/MAS (13)C NMR spectroscopy, and thermal analysis. It was found that the crystallinity of the cellulose was completely disrupted in the ionic liquid system under the conditions given. The data also demonstrated that homogeneous modification of cellulose with succinic anhydride in AmimCl resulted in the production of cellulosic monoester. The thermal stability of the succinylated cellulose decreased upon chemical modification.

[Resection of spinal tumor and reconstruction of spinal stability].

OBJECTIVE: Both primary and metastatic tumor of spine can influence spinal stability, spinal cord and nerves. The principles of dealing spinal tumor are resection of tumor decompression on spinal cord and reconstruction of spinal stability. METHODS: Since Aug. 1993 to Oct. 1996, 15 cases with spinal tumor were treated, including 4 primary spinal tumor and 11 metastatic tumor. Tumor foci were mainly in thoracic and lumbar spine. Graded by Frankel classification of spinal injuries, there were 1 case of grade A, 1 of grade B, 3 of grade C, 5 of grade D and 5 of grade E. Tumors of upper lumbar spine and thoracic spine were resected through anterior approach. Posterior approach also was adopted once posterior column was affected. Tumors of lower lumbar spine were resected by two-staged operation: firstly, operation through posterior approach to reconstruct spinal stability: secondly, operation through anterior approach. After resection of tumor, the spines were fixed by Kaneda instrument, Steffee plate or Kirschner pins. To fuse the spine, bone grafting was used in benign tumor and bone cement used in malignant tumor. RESULTS: Except one patient died from arrest of bone marrow, the others were followed up for 3 to 20 months. Postoperatively, 11 patients could sit up on one foot with the help of body supporter, and 9 patients could walk in two weeks under careful monitoring. There was no exacerbation of symptom and failure of fixation. The function of spinal cord was improved: 1 case from grade B to grade E, 1 from A to C, 2 from C to E and 4 from D to E. CONCLUSION: The spine can be reconstructed for weight bearing early by internal fixation. The symptom can be relieved and the nervous function can be improved by resection of tumor and decompression.

[Primary clinical experience of neuroendoscopy: report of 19 cases].

10 cases of basal ganglion and 6 of subcortical hematoma were evacuated. One case of temporal and 2 cases of para- and intra-ventricle arachnoid cyst were fenestrated towards the cistern or lateral ventricle. Burred holes were near the lesion, through which endoscope should run. We guided the endoscope to the target by stereotatic equipment in 10 cases of basal ganglion hematoma and 1 case of ventricle arachnoid cyst, and introduced endoscope by free-hand in other cases. Hematoma group: CT reexamination within 48 hours showed that the residual hematoma was less than 20%-30% in 9 of 11 cases. Cyst group: symptoms of all cases of arachnoid cysts were alleviated after intervention. CT after a month showed that fenestration entrance could be seen clearly in 2 cases. The cyst reduced 20%-30% in 1 case. There were no direct complications in the group. It was shown that operation by endoscope is minimal invasive and little complicated.

Nitric oxide synthase expression in vagal complex following vagotomy in the rat.

Peripheral axotomy of the spinal nerve and avulsion of the ventral roots have been found to induce increase in expression of nitric oxide synthase (NOS) in the spinal motor neurones and the dorsal root ganglion. The present study investigated changes of NOS, using NADPH-diaphorase (NADPH-d) reactivity as the marker, in vagal complex after axotomy in the rat. Eight days after left cervical vagotomy the NADPH-d reactivity was found to be markedly enhanced in the dorsal motor nucleus of the vagus nerve, the ambiguus nucleus, the solitary tract and the nucleus of the tractus solitarius, and the nodose ganglion. This study offers the first evidence of changes in NOS expression in cranial visceral components following axotomy.

[Antiinflammatory drugs inhibit the elevation of plasma CGRP concentration in endotoxin shock in rats].

In the present study, we observed the effects of indomethacin, ibuprofen, naloxone and morphine on plasma CGRP concentration 3 h after endotoxin shock in conscious rats. The results showed that indomethacin, ibuprofen and naloxone significantly inhibited the elevation of plasma CGRP concentration as well as reduced the lesion in the intestine during endotoxin shock. However, morphine had no significant effect. The data are consistent with our hypothesis that prostaglandin, as one of the inflammatory mediators which increase in shock may be an important endogenous factor for triggering the CGRP release during endotoxin shock.

Calcitonin gene-related peptide increases coronary flow and decreases coronary resistance.

Calcitonin gene-related peptide (CGRP) is a potent vasodilator, but its effects on in situ ventricular function are unknown. We studied effects of intracoronary CGRP (100, 200, and 600 pmole/min, for 10 min) in 21 open-chest chloralose-anesthetized dogs. Systemic, pulmonary, left ventricular (LVP), central venous, and pulmonary capillary wedge pressures were continuously monitored. Left ventricular wall thickness (WT) and circumflex coronary blood flow were also measured. CGRP was infused into the proximal circumflex artery. During CGRP infusion there were no changes in heart rate, cardiac index, pulmonary artery pressure, or systemic vascular resistance, no percentage change in ventricular WT, and no changes in dWT/dt, peak dP/dt, or the slope of end-systolic points on WT/LVP loops. But there were significant changes in coronary flow (CQ), coronary resistance (CRES) and mean arterial blood pressure (MAP) from control (C)* (P less than 0.05). (table; see text) CGRP is a potent coronary artery vasodilator causing notable dose-dependent decreases in coronary resistance and a rise in myocardial flow, despite a decreased MAP (all P less than 0.05). CGRP does not affect ventricular contractility in vivo.

[ERG study of high degree myopia with retinal detachment].

The authors studied the ERG of 51 cases of bilateral high degree myopia with unilateral retinal detachment and 50 cases of normal eyes. It was found that ERG in the former were characterized by a marked drop in the amplitude of the a-wave, particularly in the eye of retinal detachment, for which the ERG further diminished or failed to appear depending on the duration and extent of the lesion. Since a-waves originate from the sensory visual cells, the result was consistent with the pathology of high degree myopia and retinal detachment. The authors hold that periodic ERG examinations for dynamic surveillance is useful in monitoring the development of retinal detachment in high degree myopia.

Visual tracking of moving targets by freely flying honeybees.

The ability of freely-flying honeybees to track moving targets was examined by training them to collect a reward on a target, and then videotaping their approach to the target while it was in motion. Training experiments were carried out with several groups of bees, using various colors for the target and the background. Computer-aided frame-by-frame analysis of video recordings was used to plot the instantaneous positions of the target, as well as the position and orientation of the approaching bee in three dimensions. The results show that bees are perfectly capable of tracking moving targets and landing on them. When the distance of the target is greater than 15 cm, approaching bees correct for angular deviations of the target from the midline, both in the horizontal and in the vertical plane. In either plane, the input variables that are important to the tracking system seem to be (1) the angular bearing of the target with respect to the midline, and (2) the angular velocity of the target with respect to the eye. The tracking control system tends to orient the bee such that the target is located frontally, at an angle of ca. 35 deg below the bee's long axis. The chromatic properties of tracking behavior were investigated by employing combinations of colors for the target and background such that the boundary between the target and the background presented a contrast that was visible either only to the green-sensitive receptors of the bee's eye, or only to the blue-sensitive receptors.(ABSTRACT TRUNCATED AT 250 WORDS)