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Useulness of B Natriuretic Peptides and Procalcitonin in Emergency Medicine
S Delerme1, C Chenevier-Gobeaux, B Doumenc
1Department of Emergency Medicine and Surgery, Centre Hospitalo-Universitaire Pitié-Salpêtrière, Assistance-Publique Hôpitaux de Paris (AP-HP), 47-83 boulevard de l'hôpital, 75013 Paris, Université Pierre et Marie Curie Paris 6, France.
Insights
Biomarkers like B-type natriuretic peptide (BNP) and procalcitonin (PCT) aid in diagnosing congestive heart failure (CHF) and sepsis in emergency departments (EDs). Early diagnosis using these markers improves patient outcomes and reduces costs.
Area of Science:
- Emergency Medicine
- Clinical Biochemistry
- Infectious Diseases
Background:
- Congestive heart failure (CHF) is a primary cause of acute dyspnea in emergency departments (EDs), leading to significant morbidity and mortality.
- Diagnosing febrile illnesses, including sepsis, in the ED is challenging but crucial for reducing mortality.
- Biomarkers like B-type natriuretic peptide (BNP) and procalcitonin (PCT) offer valuable diagnostic and prognostic information.
Purpose of the Study:
- To evaluate the utility of BNP and NT-proBNP in diagnosing CHF and guiding treatment in dyspneic patients.
- To assess the accuracy of procalcitonin (PCT) for diagnosing sepsis and guiding antibiotic therapy in febrile patients.
- To highlight the importance of early biomarker availability in EDs for timely diagnosis and improved patient outcomes.
Main Methods:
- Review of literature on the diagnostic and prognostic value of BNP/NT-proBNP in acute dyspnea.
- Analysis of studies on procalcitonin (PCT) for sepsis diagnosis and antibiotic stewardship in febrile patients.
- Examination of the impact of early biomarker-guided interventions on patient outcomes and healthcare costs.
Main Results:
- BNP and NT-proBNP demonstrate high accuracy in diagnosing CHF, with adjusted thresholds for elderly and renally impaired patients.
- Early use of BNP/NT-proBNP in dyspneic patients reduces ED length of stay and treatment costs.
- Procalcitonin (PCT) is more accurate than C-reactive protein for sepsis diagnosis, with elevated levels indicating severe infection and guiding early antibiotic use.
- PCT-guided therapy in lower respiratory tract infections reduces antibiotic exposure and duration.
Conclusions:
- BNP and NT-proBNP are essential tools for rapid CHF diagnosis and management in the ED.
- Procalcitonin (PCT) significantly improves sepsis diagnosis and supports judicious antibiotic use, reducing patient exposure.
- Continuous 24/7 availability of BNP/NT-proBNP and PCT in EDs is recommended to facilitate early, accurate diagnosis and treatment, improving patient outcomes.
Abstract:
Congestive heart failure (CHF) is the main cause of acute dyspnea in patients presented to an emergency department (ED), and it is associated with high morbidity and mortality. B-type natriuretic peptide (BNP) is a polypeptide, released by ventricular myocytes directly proportional to wall tension, for lowering renin-angiotensin-aldosterone activation. For diagnosing CHF, both BNP and the biologically inactive NT-proBNP have similar accuracy. Threshold values are higher in elderly population, and in patients with renal dysfunction. They might have also a prognostic value. Studies demonstrated that the use of BNP or NT-proBNP in dyspneic patients early in the ED reduced the time to discharge, total treatment cost. BNP and NT-proBNP should be available in every ED 24 hours a day, because literature strongly suggests the beneficial impact of an early appropriate diagnosis and treatment in dyspneic patients.Etiologic diagnosis of febrile patients who present to an ED is complex and sometimes difficult. However, new evidence showed that there are interventions (including early appropriate antibiotics), which could reduce mortality rate in patients with sepsis. For diagnosing sepsis, procalcitonin (PCT) is more accurate than C-reactive protein. Thus, because of its excellent specificity and positive predictive value, an elevated PCT concentration (higher than 0.5 ng/mL) indicates ongoing and potentially severe systemic infection, which needs early antibiotics (e.g. meningitis). In lower respiratory tract infections, CAP or COPD exacerbation, PCT guidance reduced total antibiotic exposure and/or antibiotic treatment duration.
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