Objective To investigate the blood clotting dysfunction of invasive pulmonary aspergillosis(IPA)and the therapeutic effect of low molecular hepafin in a mouse model．Methods The neutropenic IPA mouse model was constructed by being given cyclophosphamide to depress immunologic function，and then intranasally challenged with Aspergillus fumigatus conidia．(1)Blood clotting function were assessed by bleeding time，clotting time，platelet count and antithrombase-III(AT-III)activity．Seventy-two mice were randomly assigned into 4 groups．Group A received only normal saline．group B received normal saline to substitute the cycloph0sphamide，and the rest equal to group D．Group C received normal saline to substitute the AspergiUus fumigatus conidia suspension，and the rest equal to group D．Group D(model group)received cyclophosphamide(intraperitoneally，150 mg／kg，d4，d1)and Aspergillus fumigatus conidia suspension(intranasally，40 μL／mouse，1．5×10∧5／mL，d0)．Six mice were randomly sacrificed in each group for analysis of blood clotting function per 24 h after inoculation for 3 times．(2)Therapeutic effect of low molecular heparin was determined by survival time of IPA mice．One hundred and eighteen mice were randomly assigned into 4 groups after challenged with 6×10 conidia／mouse and received one of the following regimens daily from dl to d7 after challenge，vehicle(group E，n=29)，low molecular heparin(group F，n=30，subcutaneous injection，1000 IU／kg，qd×7 d)，amphotericin B(group G，n=29，intraperitoneal，1 m kg，qd×7 d)，low molecular heparin plus amphotericin B(group H，n=30)．Mice survivals were recorded once daily to d21 after innoculation．Results (1)AT-III activity of group D decreased significantly 24 h after innoculation．Bleeding time and clotting time decreased significantly and AT—III activity decreased sequentially 48 h after innoculation．The platelet decreased significantly 72 h after innoculation，and bleeding time shoaened further．Clotting time was longer than that 0f 48 h．but still shorter than norm al and AT-III activity decreased sequentially．There were significant differences when comparing group D with group A，B and C(all Plt;0.01)．And there was no significant difference between group A，B and C(all Pgt;0．05)．(2)Survival analysis indicated that the therapeutic effect of low molecular hepafin plus amphotericin B was better than that of amphotericin B or low molecular heparin alone．No therapeutic effect was found in group F(group E vs group F，Pgt;0．05，both group E and group F compared with group H，P lt;0．01．Group H vs group G，P lt;0．05．Both group E and group F compared with group G，P lt;0．05)．Conclusions The results suggest that there is blood clotting dysfunction in IPA mice and AT—III activity may be an early index to monitor the disfunction．Compared with the therapeutic effect of amphoterinein B alone，low molecular hepafin plus amphoterincin B can prolong survival of neutropenic IPA mice
Objective
To identify the risk factors for coagulopathy after Stanford type A acute aortic dissection (AAD) repair to offer evidence for improvement of patients' prognosis.
Methods
We retrospectively analyzed the clinical data of 95 patients undergoing Stanford type A AAD repair in Beijing Anzhen Hospital between January 2013 and December 2014. Patients with thromboelastography-coagulation index (TEG-CI) ≤–3 after surgery were allocated to a coagulopathy group (n=17, average age 48.70 years), whereas patients with TEG-CI >–3 after surgery were allocated to a control group ( n=78, average age 46.80 years). Multivariate analysis was used to identify risk factors for coagulopathy after surgery.
Results
Seventeen patients suffered from coagulopathy after surgery. Patients in the coagulopathy group had larger amount of fluid drainage than that in the control group (P=0.008). Risk factors for postoperative coagulopathy were activated partial thromboplastin time (APTT) at the end of surgery ( OR=0.011, 95% confidence interval 0.001 to 0.021, P=0.035), fibrinogen degradation products (FDP) at the end of surgery (OR=0.004, 95% confidence interval 0.001 to 0.007, P=0.022) and platelet count (×109/L) at the end of surgery (OR=–0.002, 95% confidence interval –0.003 to 0.000, P=0.049). The lower risk of postoperative coagulopathy was related to the platelet count at the end of surgery up to 137.00 ×109/L.
Conclusion
Postoperative coagulopathy could be related to the clinical and experimental variables. In a representative sample of Chinese adults undergoing Stanford type A AAD surgery, APTT, FDP and platelet count at the end of surgery are independent risk factors associated with postoperative coagulopathy. Adding haemostatic, such as fibrinogen and prothrombinase complex, is good for improving the recovery of coagulation function to reduce bleeding and postoperative blood transfusion, as well as adding platelet, plasma and other coagulation factors after AAD surgery.
ObjectiveTo investigate the correlations between lipopolysaccharide(LPS), phospholipase A2 (PLA2) and platelet-activating factor (PAF) with coagulopathy after severe chest and abdominal injuries and their mechanisms.
MethodsClinical data of 82 patients with severe chest and abdominal injuries whose trauma index (TI) was greater than or equal to 17 points in No. 253 Hospital of People's Liberation Army from January 2009 to June 2012 were retrospectively analyzed (severe chest and abdominal injury group). Those patients who had concomitant traumatic brain injuries or died in the Emergency Department were excluded from this study. There were 58 male and 24 female patients with their age of 16-76 (43.59±16.33)years. There were 17 patients with open injuries and 65 patients with closed injuries. There were 23 patients with fall injuries, 47 patients with traffic injuries, 8 patients with blunt force injuries, and 4 patients with penetrating injuries. Forty-two healthy volunteers who received routine medical examinations in the outpatient department of our hospital were chosen as the control group, including 27 males and 15 females with their age of 24-47 (37.32±10.45) years. Blood platelet (PLT) count, D-dimer (D-D), activated partial thromboplastin time (APTT), LPS, PLA2 and PAF were compared between the 2 groups, and linear correlation analysis was performed.
ResultsPLT of the severe chest and abdominal injury group patients were significantly lower than that of the control group[(83.44±38.52)×109/L vs. (191.52±23.31)×109/L]. D-D[(1 823.89±608.02) U/L vs. (105.78±44.53) U/L], APTT [(68.24±24.12) s vs. (22.47±9.41) s], LPS[(438.66±106.02) U/L vs. (87.38±46.51) U/L], PLA2 [(41.35±14.26) ng/ml vs. (7.47±5.27)ng/ml] and PAF[(15 765.31±4 431.65) ng/L vs. (3 823.45±529.72) ng/L] of the severe chest and abdominal injury group patients were significantly higher than those of the control group(P < 0.001). PLT was significantly negatively correlated with LPS, PLA2 and PAF with all the respective correlation coefficient(r)less than-0.933 5. D-D and APTT were significantly positively correlated with LPS, PLA2 and PAF with all the respective r larger than 0.921 6.
ConclusionLPS, PLA2 and PAF participate in the pathogenesis of coagulopathy in patients with severe chest and abdominal injuries. Early intervention against LPS, PLA2 and PAF may improve coagulopathy and survival rate of patients with severe chest and abdominal injuries.
ObjectiveTo investigate the effects of intraoperative intermittent pneumatic compression (IPC) treatment on coagulation and fibrinolysis, lower extremity venous blood flow velocity, and deep venous thrombosis (DVT) in patients with gastric cancer (GC) after radical gastrectomy. MethodsThe patients with GC who underwent radical gastrectomy at Hebei Provincial People’s Hospital from July 2021 to July 2024 were retrospectively enrolled, then the patients were assigned into control group (the patients who did not receive intraoperative IPC) and study group (the patients who received intraoperative IPC), and the propensity score matching (PSM) method was used to conduct 1∶1 matching based on the basic characteristics such as age, gender, body mass index, comorbidities to ensure baseline comparability between the two groups. The incidences of postoperative DVT and lower extremity swelling, and coagulations [prothrombin time (PT), thrombin time (TT), activated partial thromboplastin time (APTT)] and fibrinolysis [D-dimer (D-D), fibrinogen (FIB), and fibrin degradation products (FDP)], as well as lower extremity venous blood flow velocity were analyzed after PSM. The locally weighted regression was used to analyze the correlation between the coagulation and fibrinolytic functions indexes and the lower extremity venous blood flow velocity. ResultsA total of 120 patients were matched (60 cases per group). The baseline characteristics of both groups were comparable (P>0.05). The incidences of DVT on day 7 and lower extremity swelling on day 1, 3, and 7 after surgery in the study group were significantly lower than those in the control group (P<0.05). The results of repeated-measures analysis of variance showed that there were statistically significant differences in the inter-group, time-related, and group-by-time interaction effects of coagulation and fibrinolysis indexes as well as lower extrimety venous blood flow velocities (P<0.05). The impact of the time factor on coagulation and fibrinolysis indexes and lower extrimety venous blood flow velocities varied with intraoperative IPC intervention measures. After surgery, the PT, TT, APTT, and lower extrimety venous blood flow velocities in the study group first decreased and then increased as compared with those before surgery, and the decrease degree was smaller and the increase degree was larger than those in the control group. After surgery, the D-D, FIB, and FDP in the study group first increased and then decreased as compared with those before surgery, and the increase degree was smaller and the decrease degree was larger than those in the control group. Both PT and TT were significantly positively correlated with femoral vein blood flow velocity (r=0.21, P=0.042; r=0.22, P=0.040), and both also showed significant positive correlations with popliteal vein blood flow velocity (r=0.25, P＜0.001; r=0.20, P=0.032). APTT was only significantly positively correlated with popliteal vein blood flow velocity (r=0.33, P＜0.001). D-D was negatively correlated with the flow velocities of the femoral vein, external iliac vein, and popliteal vein (r=–0.23, P=0.012; r=–0.22, P=0.047; r=–0.37, P<0.001). Both FIB and FDP were negatively correlated with the flow velocity of the femoral vein (r=–0.23, P=0.036; r=–0.27, P=0.002). FIB was also negatively correlated with the flow velocity of the popliteal vein (r=–0.26, P=0.038), and FDP was negatively correlated with the flow velocity of the external iliac vein (r=–0.31, P<0.001). ConclusionBased on the results of this study, intraoperative IPC treatment could improve coagulation and fibrinolytic functions of patients with GC after surgery, and has a certain preventive effect on occurrence DVT of lower extremity.
