Assessment of Nailfold Capillaroscopy Findings in Pregnant Women having Preeclampsia: A Research Protocol

Abstract

Introduction: Pregnancy causes significant vascular and cutaneous changes in a woman’s body. Preeclampsia is one of the life-threatening conditions associated with high blood pressure and proteinuria after the 20th week of pregnancy. It can cause placental hypoperfusion and placental insufficiency, leading to foetal defects or, in severe cases, foetal loss, which can be prevented by early diagnosis and treatment. There are many ways to observe and study the microcirculation non invasively the safest and most accessible method is nailfold capillaroscopy. Nail-fold Video Capillaroscopy (NVC) is a hand-held digital microscope used to observe the microcirculation at the nailfold of the hands. Thus, comparing the capillary status with healthy subjects will help establish an early diagnosis and manage cases to prevent further complications in the mother and newborn. Need of the Study: The pathophysiology states that preeclampsia is related to systemic endothelial dysfunction, causing the release of Tumour Necrosis Factor (TNF) alpha, a proinflammatory mediator, leading to hypoxia of the placenta and the loss of endothelial cell-lined capillaries. Thus, there is a need to find if there is an established correlation in association of decreased Capillary Density (CD) in individuals with preeclampsia. Although evidence supporting a link between decreased CD and preeclampsia is limited, timely assessment and prevention are crucial. Nailfold capillaroscopy, an accessible and non invasive imaging method, holds promising calibre for understanding microvascular changes in preeclampsia. This could facilitate post-conception monitoring and early interventions to identify and address circulatory issues in affected women with preeclampsia. Aim: To study and compare the nailfold capillary changes in women diagnosed with preeclampsia and women having normal and uneventful pregnancies. Materials and Methods: A comparative cross-sectional study will be done in the Outpatient Department (OPD) and Inpatient Department (IPD) of Obstetrics and Gynaecology and the Outpatient Department of Dermatology at AVBRH Sawangi Meghe, Wardha, Maharashtra, India, from March 2023 to March 2025. A total of 150 pregnant women will be considered in the study, with 75 women being normal pregnant women (controls) and 75 pregnant women diagnosed with preeclampsia (cases). In order to confirm the gestational age of the patients, fundal height and abdominal circumference measurements will be taken. Demographic data, Basal Metabolic Index (BMI), weight gain during pregnancy, laboratory reports including Complete Blood Count (CBC), coagulation profile (Prothrombin Time, International Normalised Ratio, Activated Partial Thromboplastin Time), liver function tests, kidney function tests, urine examinations, and serial ultrasonography reports available for the patients will be noted. Pre-examination blood pressure will be recorded and compared with the baseline to confirm the status of preeclampsia after obtaining written consent from the patients. Nailfold capillaroscopy will be performed using a (Dinolite -AF4115ZT) dermoscope equipped with a 200X magnification, high-resolution lens in a non polarised light setting with oil immersion as a fluid coupling. The observations will be used to interpret the results of the study. Results will be calculated for finding differences between the two comparative groups of cases and controls at a p-value of ≤0.05.

Keywords

• blood pressure
• gestation
• nailfold microcirculation
• non invasive