[Long-term follow-up study of post-COVID-19 patients].

AIM: To evaluate dynamic changes in the lungs, hemostasis system, immune system in different terms after coronavirus pneumonia. MATERIALS AND METHODS: Ventilation-perfusion single-photon emission computed tomography/computed tomography (CT), functional methods of lung investigation, evaluation of hemostasis system, immune status and specific humoral immune response were performed and evaluated in different terms after coronavirus pneumonia. A total of 71 patients were examined according to this protocol. We examined patients with the lesion volume not less than 50% according to chest CT. All patients were divided into 2 groups depending on the distance from the acute stage of coronavirus pneumonia. Group 1 included patients who were examined early (3060 days after hospital discharge), group 2 included patients who were examined later (61180 days after hospital discharge). RESULTS: We obtained gradual regression of pathologically-modified tissue from 67.3% during the inpatient phase to 30.9% during the early period and to 19.7% during the late period of examination, according to CT scan of the chest organs. The same tendency was demonstrated by diffusion capacity of the lungs. Perfusion scintigraphy data showed a decrease in perfusion deficit from 26.012.8% during the early period of examination to 19.46.2% during the late period of examination. On the contrary, ventilatory scintigraphy demonstrates the increase of isotope passage time through the alveolar-capillary membrane over time (from 48.231.3 minutes in the early period to 83.637.2 minutes in the late period). An increase in D-dimer was detected in 24% of patients in the early group. The levels of inflammatory markers, indices of immune status, and specific humoral immune response did not differ in the two described groups. CONCLUSION: The results demonstrate gradual regression of pathological changes caused by coronavirus infection.

Utility of International Society on Thrombosis and Hemostasis Bleeding Assessment Tool (ISTH-BAT) in Patients with Inherited Bleeding Disorders: A Cross-Sectional Study from Southern India.

The International Society on Thrombosis and Hemostasis bleeding assessment tool (ISTH-BAT) was developed to record bleeding symptoms and aid in patient diagnosis. This study was done to investigate the utility of ISTH-BAT in patients suspected to have inherited bleeding disorders. This cross-sectional study was conducted in a tertiary care hospital in Southern India over 3 and 1/2 years. A trained investigator administered the ISTH-BAT questionnaire to 432 patients undergoing evaluation for inherited bleeding disorder prior to routine coagulation screening and confirmatory tests and to 131 healthy volunteers as controls. Among patients, 42(9.7%) had primary hemostatic defect, 150(34.7%) had secondary hemostatic defects and 229(53%) had normal screening coagulogram with mean bleeding scores (BS) being 5.9, 6.9, and 4.2 respectively and the proportion of patients with abnormal BS being 69%, 88.7% and 59.4% respectively; the latter qualifying as unknown hemostatic defect. 11(2.5%) with acquired hemostatic defect on workup were excluded. The mean BS was 1.52 among healthy volunteers. Common bleeding patterns were epistaxis (73.8%), cutaneous bleeding (52.4%), hematuria (54.8%), menorrhagia (50%) in primary hemostatic defect; cutaneous bleeding (72%), muscle hematoma (58.7%), hemarthrosis (46.7%), menorrhagia (58.7%) in secondary hemostatic defects and epistaxis (45.9%), cutaneous bleeding (62.4%), menorrhagia (30.7%) in normal screening coagulogram group. Grade of bleeding was mostly 2 and sometimes 4 in primary, 2-4 in secondary and 1-2 in normal screening coagulogram group. ISTH-BAT is a valuable tool to record lifelong bleeding history. The pattern and score give clues regarding the nature and severity of the bleeding disorder.

Indicators of Hypoxia Tolerance as Determined by Cellular Elements of Rat Blood.

Although hypoxia tolerance is mainly determined genetically, it is important to study individual variability of animal organisms in order to identify the factors that underlie their tolerance to hypoxic exposure. We investigated blood cell counts and coagulograms in Wistar rats as predictors allowing the animal population to be split into hypoxia-tolerant and hypoxia-intolerant individuals. The validity of the specific predictors' choice was proved by a coincidence between the population split in accordance with the detected individual parameters and the results of testing animals in a decompression chamber at a rarefaction corresponding to the "rise to an altitude" of 11500 m above sea level. Circulating blood cells were quantitatively assessed by eighteen indicators before and after hypoxic exposure. The differences between animals low-tolerant (LT), high-tolerant (HT), and medium-tolerant (MT) to hypoxia were determined by five indicators: white blood cell count (WBC), granulocyte count (Gran#), red blood cell count (RBC), reticulocyte count/percent (RTC), and mean corpuscular hemoglobin (MCH). The RBC, RTC, and MCH values in HT rats were significantly higher than in LT animals (by 1.4, 1.9, and 1.1 times, respectively). The WBC and Gran# values in HT rats were lower than in LT individuals. The hypoxia tolerance indices (HTI) were calculated using the original formula. It was established that in LT rats, the HTI ≤ 0.203, in HT rats ≥ 0.335, and in MT rats < 0.335 but > 0.203. After testing in a decompression chamber, the activated partial thromboplastin time (APTT), thrombin time (TT), and prothrombin time (PT) decreased, but the fibrinogen level increased. LT rats were characterized by the lowest APTT, TT, and PT values and the highest values of the fibrinogen level. Our results indicate that one of the most important mechanisms underlying a high hypoxia tolerance in rats consists in sustaining reciprocal relationships between the complex of RBC indicators, which tend to increase under hypoxia, and Gran# indicators, which tend to decrease after hypoxic exposure.

Significance of blood coagulation function in patients with gestational diabetes mellitus / 重庆医学

Objective To compare the differences of clotting laboratory indices and thromboelastogram (TEG) parameters between pregnant women with gestational diabetes mellitus (GDM ) and healthy pregnant women .Methods The detection results of clotting laboratory indices and TEG in 46 pregnant women with GDM and 49 healthy pregnant women in our hospital from June 2013 to July 2014 were retrospectively analyzed and compared .Results In the comparison of the GDM group and the control group ,the traditional clotting laboratory indices ,INR and PT had statistically significant differences(P0 .05) .The common TEG indices of R value ,K value ,Angle ,MA value and CI value were statistically different between the GDM group and control group(P<0 .05) .Conclusion TEG is more sensitive than traditional clotting detection in monitoring the prethrombotic state of pregnant women with GDM and has certain significance for guiding early clinical intervention ,alleviating or delaying complications and improving the maternal and infantile outcome .

Alteration of coagulogram in women with polycystic ovary syndrome / 中华内分泌外科杂志

Objective To evaluate the alteration of coagulogram in patients with polycystic ovary syn -drome(PCOS).Methods Coagulogram was compared between 48 patients with PCOS and 42 healthy women. Pre-and post-therapy coagulogram were also compared and the correlation of coagulogram alternation and endocrine indicators were analyzed in PCOS patients .Results The mean age of the 48 PCOS patients was 27.6 ±4.2. Compared to the healthy women , PCOS patients presented higher body mass index , testosterone , insulin and fast-ing blood glucose levels ( P＜0.05 ) .Refer to the coagulogram , PCOS patients showed shorter prothrombin time and activated partial thromboplastin time , lower international normalized ratio of prothrombin time ratio , and the activity of thrombin(P＜0.05), longer thrombin time and lower fibrinogen , D Dimer and fibrin degradation prod-uct levels(P＜0.05).After three circles of treatment, the above indicators of coagulogram were recovered (P＜0.05).Moreover, the alteration of international normalized ratio was associated with fasting blood glucose and in-sulin significantly(P＜0.05).The alteration of D Dimer and fibrin degradation product were associated with fast-ing blood glucose, insulin and testosterone significantly (P＜0.05).Conclusions PCOS patients showed relative hypercoagulatory and hypofibrinolytic status which may be induced by hyperglycemia , hyperinsulinemia and hyper androgenemia.Thus, coagulogram should be monitored and interfered in PCOS patients to prevent thrombosis .

Pruebas del coagulograma y componentes de la hemostasia. Utilidad para diagnosticar las diátesis hemorrágicas / Tests of coagulation and hemostasis components. Usefulness for diagnosing hemorrhagic diathesis

El coagulograma comprende un conjunto de pruebas que exploran la participación de todos los componentes de la hemostasia: endotelio vascular, actividad plaquetaria, factores plasmáticos y fibrinolíticos. Con frecuencia, la ejecución de estas pruebas resulta compleja para el personal técnico, por lo que la profundización en el conocimiento e interpretación de los resultados de cada una de estas, debe redundar en el fortalecimiento y preparación de los profesionales de la salud. En el presente trabajo se describen las principales pruebas del coagulograma convencional, el principio y los valores de referencia de cada una, así como las posibles enfermedades de acuerdo con la alteración del sistema hemostático que corresponde a la alteración del coagulograma, con el objetivo de brindarle al médico una información básica para la correcta ejecución y adecuada interpretación de los resultados

Coagulogram comprises a set of tests, which explore the participation of all components of hemostasia: vascular endothelium, platelet activity, plasma and fibrinolytic factors. Often, the technical staff finds complex to do these tests, so deepening knowledge, understanding, and interpreting the results of each of these tests should result in strengthening and training of health professionals. This paper describes the main conventional coagulation tests, the beginning and the reference values of each of them, and the possible diseases according to the alteration of the hemostatic system corresponding to the alteration of coagulation, with the aim of providing medical background information for the proper performance and proper interpretation of results

Pruebas del coagulograma y componentes de la hemostasia. Utilidad para diagnosticar las diátesis hemorrágicas / Tests of coagulation and hemostasis components. Usefulness for diagnosing hemorrhagic diathesis

El coagulograma comprende un conjunto de pruebas que exploran la participación de todos los componentes de la hemostasia: endotelio vascular, actividad plaquetaria, factores plasmáticos y fibrinolíticos. Con frecuencia, la ejecución de estas pruebas resulta compleja para el personal técnico, por lo que la profundización en el conocimiento e interpretación de los resultados de cada una de estas, debe redundar en el fortalecimiento y preparación de los profesionales de la salud. En el presente trabajo se describen las principales pruebas del coagulograma convencional, el principio y los valores de referencia de cada una, así como las posibles enfermedades de acuerdo con la alteración del sistema hemostático que corresponde a la alteración del coagulograma, con el objetivo de brindarle al médico una información básica para la correcta ejecución y adecuada interpretación de los resultados(AU)

Coagulogram comprises a set of tests, which explore the participation of all components of hemostasia: vascular endothelium, platelet activity, plasma and fibrinolytic factors. Often, the technical staff finds complex to do these tests, so deepening knowledge, understanding, and interpreting the results of each of these tests should result in strengthening and training of health professionals. This paper describes the main conventional coagulation tests, the beginning and the reference values of each of them, and the possible diseases according to the alteration of the hemostatic system corresponding to the alteration of coagulation, with the aim of providing medical background information for the proper performance and proper interpretation of results(AU)