The role of mean platelet volume, platelet distribution width and platelet / lymphocyte ratio in development of cerebral venous thrombosis

Amaç: Ortalama platelet hacmi (OPH) ve platelet dağılım genişliği (PDG), platelet hacmini gösteren parametrelerdir. Büyük plateletlerin küçük plateletlere kıyasla enzimatik ve metabolik olarak daha aktif kabul edilmektedir. Artmış OPH ve PDG değerleri ile arteryel tromboz arasındaki ilişki gösterilmiştir ancak venöz trombozdaki yeri tam olarak bilinmemektedir. İnflamatuar bir gösterge kabul edilen platelet/ lenfosit oranının artışının(PLO) birçok hastalıkla ilişkisi bilinmekteyken venöz trombozda kullanımı ile ilgili az sayıda çalışma mevcuttur. Bu nedenle bu çalışmamızdaki amacımız OPH, PDG ve PLO değerleri ile serebral venöz sinüs trombozu(SVST) arasındaki ilişkiyi ortaya koymaktır. Yöntem: Çalışmamıza retrospektif olarak Ocak 2008- Eylül 2016 tarihleri arasında kliniğimizde SVST tanısı ile izlenmiş 54 hasta ile benzer yaş ve cinsiyete sahip 50 kontrol dahil edildi. Hasta ve kontrol grubu OPH, PDG ve PLO değerleri açısından kıyaslandı. Bunun yanında hasta grubu kendi içinde beyin parankimal lezyonu olan ve olmayanlar olarak ikiye ayrılarak OPH, PDG ve PLO'nun prognoz üzerindeki etkisi de değerlendirildi. Bulgular: Hasta grubunda kontrollere kıyasla OPH, PDG ve PLO değerleri daha yüksekken parankimal lezyonu olan ve olmayan hastalar arasında anlamlı fark saptanmadı. Ek olarak SVST gelişimi için OPH ve PDG değerleri anlamlı bağımsız değişkenler olarak saptanırken ROC analizi ile optimum cut-off değerleri OPH için 8.85 iken, PDG için 15.75, PLO için ise 168.53 olarak tespit edildi. Sonuç: Sonuç olarak, OPH, PDG ve PLO değerleri SVST'li hastalarda kontrollerden daha yüksek bulunmuştur ancak prognozu belirlemede etkileri saptanmamıştır. Ek olarak, OPH ile PDG yüksekliğinin SVST gelişimi için yeni bir bağımsız risk faktörleri olduğunu söyleyebiliriz.

Ortalama platelet hacmi, platelet dağılım genişliği ve platelet/lenfosit oranının serebral venöz tromboz gelişimindeki rolü

Objective: Mean platelet volume (MPV) and platelet distribution width (PDW) are parameters that indicate platelet volume. It is assumed that large platelets are enzymatically and metabolically more active than small platelets. The relationship between elevated MPV and PDW values and arterial thrombosis has been demonstrated, but their roles in venous thrombosis are not fully understood. While the platelet / lymphocyte ratio (PLR), which is considered to be an inflammatory indicator, is known to be associated with many diseases, there are only a few studies in venous thrombosis. For this reason, our aim in this study is to establish the relationship between MPV, PDW and PLR values and cerebral venous sinus thrombosis (CVST). Method: Our study included 54 patients who were diagnosed with CVST in our clinic between January 2008 and September 2016, and 50 controls with similar age and sex. The patients and control groups were compared in terms of MPV, PDW and PLR values. In addition, the patient group was divided into two groups, according to parenchymal brain lesions, and the effect of MPV, PDW, and PLR on prognosis was also assessed. Results: While the MPV, PDW and PLR values were higher in the patient group compared to the controls, there was no significant difference between patients with and without parenchymal lesions. In addition, as MPV and PDW values for CVST development were determined as significant independent variables, optimal cut-off values were identified 8.85 for MPV, 15.75 for PDW and 168.53 for PLR in ROC analysis. Conclusions: As a result, MPV, PDW and PLR values were higher in patients with SVST than controls, however their prognostic significance was not determined. In addition, we may suggest that higher MPV and PDW values are new independent risk factors for CVST development.

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