[Capillaroscopy. Procedure and nomenclature].

Nailfold capillaroscopy is a non-invasive diagnostic tool used to examine the microcirculation in the nailfold region. Prior research has shown its utility in identifying early signs of systemic diseases, particularly autoimmune conditions like systemic sclerosis. However, variability in terminology and interpretation has limited the reproducibility of findings. This gap motivated the need for a standardized framework to improve diagnostic accuracy and consistency. Establishing a common language for capillary features is essential for comparing results across studies and clinical settings. No prior work had resolved the lack of consensus on defining pathological capillary changes. The absence of a unified diagnostic approach has hindered the widespread adoption of capillaroscopy in routine clinical practice. This paper addresses that limitation by proposing a structured nomenclature and diagnostic criteria. The goal is to enhance the reliability of capillaroscopy as a diagnostic tool in autoimmune connective tissue diseases.

The aim of this study is to standardize the terminology, equipment, and diagnostic criteria for nailfold capillaroscopy. The researchers propose a consensus-based framework to improve the diagnostic and prognostic value of the technique. This initiative addresses the lack of uniformity in describing capillary abnormalities. The study focuses on defining specific pathological features that are indicative of autoimmune diseases, especially systemic sclerosis. The motivation stems from the need to increase the reproducibility and comparability of capillaroscopy findings. Standardized definitions will help clinicians interpret results more consistently. The framework also includes recommendations for technical equipment and documentation procedures. This approach is expected to enhance the utility of capillaroscopy in clinical and research settings.

The study employed a consensus-building approach among a working group of experts. The researchers outlined the necessary equipment, including binocular microscopes with specific magnification ranges. They also defined the required magnification levels for accurate diagnosis. Digital archiving was emphasized as a mandatory component of the procedure. The working group proposed a set of standardized definitions for capillary abnormalities. These definitions include features such as caliber variations, ectasia, and torsion. The study also established criteria for pathological significance based on the combination of findings. The framework includes diagnostic thresholds for features like capillary elongation and avascular areas.

The study identified key pathological features that are indicative of autoimmune connective tissue diseases. These include capillary caliber variations, ectasia, ramifications, and elongation exceeding 350 micrometers. Torsion with at least two crossing segments per capillary loop was also found to be significant. The simultaneous occurrence of multiple abnormalities increases diagnostic accuracy. Isolated findings such as bushy capillaries and thrombosis also indicate disease presence. Giant capillaries with a lumen larger than 50 micrometers are highly specific for systemic sclerosis. Avascular areas are another key indicator of SSc. The standardized definitions improve the quality and comparability of capillaroscopy results.

The authors propose that standardized definitions enhance the reliability of nailfold capillaroscopy in diagnosing autoimmune diseases. The framework increases the reproducibility of findings across different clinical settings. The study suggests that specific capillary features can serve as diagnostic markers for systemic sclerosis. The working group recommends the use of binocular microscopes with defined magnification levels. Digital archiving is emphasized as a necessary step for documentation. The proposed criteria improve the diagnostic accuracy of capillaroscopy. The authors suggest that these definitions will facilitate better clinical comparisons. The consensus-based approach is expected to enhance the utility of capillaroscopy in autoimmune disease management.