{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,4]],"date-time":"2026-09-04T16:15:41Z","timestamp":1788538541355,"version":"build-2803163510"},"reference-count":58,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2026,2,9]],"date-time":"2026-02-09T00:00:00Z","timestamp":1770595200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100005375","name":"Latvian Council of Science","doi-asserted-by":"crossref","award":["Izp-2022\/1-0326"],"award-info":[{"award-number":["Izp-2022\/1-0326"]}],"id":[{"id":"10.13039\/501100005375","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Medicina"],"abstract":"<jats:p>Background and Objectives: Septic shock is marked by profound circulatory and cellular dysfunction, with mortality rates of 25\u201340% despite guideline-based resuscitation. Normalization of macrohemodynamic variables often fails to restore tissue perfusion, a concept known as hemodynamic incoherence. Persistent microcirculatory dysfunction is associated with organ failure and poor outcomes, underscoring the limitations of systemic monitoring alone. This focused narrative review synthesizes current evidence on microcirculatory monitoring in septic shock, with emphasis on bedside and emerging optical technologies, and evaluates their role as adjuncts to traditional hemodynamic assessment for perfusion-targeted resuscitation. Materials and Methods: A concept-driven search of PubMed\/MEDLINE (January 2015 to January 2026) was performed, incorporating MeSH and free-text terms for septic shock, microcirculation, hemodynamic coherence, and monitoring modalities. Foundational pre-2015 studies were included for context. Articles were screened using predefined inclusion\/exclusion criteria to minimize bias, with thematic qualitative synthesis. A PRISMA-inspired flow diagram was used to summarize the study selection process. Results: Microcirculatory alterations in septic shock include reduced functional capillary density, perfusion heterogeneity, and impaired oxygen extraction, persisting despite macrohemodynamic correction. Bedside markers, such as capillary refill time (CRT) and mottling, track microvascular recovery more closely than lactate. When used to guide resuscitation, CRT-based strategies show a non-significant mortality trend in randomized evaluation, with later studies reporting benefit in composite clinical outcomes. Optical technologies offer non-invasive insights: photoplethysmography (PPG) and perfusion index (PI) show prognostic value and early detection of incoherence; automated CRT (aCRT) enhances reproducibility; advanced modalities, such as laser speckle contrast imaging (LSCI), near-infrared spectroscopy (NIRS), and sublingual videomicroscopy, provide detailed physiological data but face standardization challenges. Recent interventional evidence, including peripheral perfusion-targeted RCTs, supports improved outcomes, though large-scale trials remain limited. Conclusions: Microcirculatory monitoring provides complementary, physiologically relevant information to macrohemodynamic assessment in septic shock. Emerging bedside tools, such as PI and aCRT, are poised for routine use, while multimodal integration may enable personalized management. Future research should prioritize standardization, AI-driven analysis, and randomized trials to confirm outcome benefits.<\/jats:p>","DOI":"10.3390\/medicina62020346","type":"journal-article","created":{"date-parts":[[2026,2,9]],"date-time":"2026-02-09T10:45:31Z","timestamp":1770633931000},"page":"346","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Microcirculation Monitoring in Septic Shock: Focused Review"],"prefix":"10.3390","volume":"62","author":[{"ORCID":"https:\/\/orcid.org\/0009-0009-3217-1924","authenticated-orcid":false,"given":"Viktorija","family":"Serova","sequence":"first","affiliation":[{"name":"Department of Anaesthesiology, Intensive Care and Clinical Simulations, Riga Stradins University, LV-1007 Riga, Latvia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mara","family":"Klibus","sequence":"additional","affiliation":[{"name":"Department of Anaesthesiology, Intensive Care and Clinical Simulations, Riga Stradins University, LV-1007 Riga, Latvia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zbignevs","family":"Marcinkevics","sequence":"additional","affiliation":[{"name":"Faculty of Medicine and Life Sciences, University of Latvia, LV-1586 Riga, Latvia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Uldis","family":"Rubins","sequence":"additional","affiliation":[{"name":"Faculty of Science and Technology, University of Latvia, LV-1586 Riga, Latvia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andris","family":"Grabovskis","sequence":"additional","affiliation":[{"name":"Faculty of Science and Technology, University of Latvia, LV-1586 Riga, Latvia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Olegs","family":"Sabelnikovs","sequence":"additional","affiliation":[{"name":"Department of Anaesthesiology, Intensive Care and Clinical Simulations, Riga Stradins University, LV-1007 Riga, Latvia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,2,9]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"801","DOI":"10.1001\/jama.2016.0287","article-title":"The Third International Consensus Definitions for Sepsis and Septic Shock (Sepsis-3)","volume":"315","author":"Singer","year":"2016","journal-title":"JAMA"},{"key":"ref_2","unstructured":"(2025). 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