A frequently used validated set of clinical stability criteria in patients with CAP and supported by the 2019 ATS/IDSA CAP guidelines consists of a temperature ≤37.8 ᵒC (100.0 ᵒF) AND no more than 1 CAP-related sign of clinical instability as listed below: 1-3
- Heart rate >100/min
- Systolic blood pressure <90 mm Hg
- Respiration rate >24 breaths/min
- Arterial oxygen saturation <90% or Pa02<60 mm Hg (room air)
Using these criteria, the risk of clinical deterioration serious enough to necessitate transfer to an intensive care unit may be 1% or less, 1 while failure to achieve clinical stability within 5 days is associated with higher mortality and worse clinical outcome. 2 The median time to clinical stability (as defined) for CAP treatment is 3 days.1
A 2016 randomized-controlled trial involving patients hospitalized with CAP found that implementation of above clinical stability criteria was associated with safe discontinuation of antibiotics after a minimum of 5 days of appropriate therapy. 3
Potential limitations of the above study include heavy use of quinolones (80%), underrepresentation of patients with severe CAP (Pneumonia Risk Index, PSI, V), and exclusion of nursing home residents, immunosuppressed patients, those with chest tube, or infection caused by less common organisms, such as Staphylococcus aureus or Pseudomonas aeruginosa.
Lack of clinical stability after 5 days of CAP treatment should prompt evaluation for complications of pneumonia (eg, empyema, lung abscess), infection due to organisms resistant to selected antibiotics, or an alternative source of infection/inflammatory/poor response. 2
- Halm, EA, Fine MJ, Marrie TJ, et al. Time to clinical stability in patients hospitalized with community-acquired pneumonia: implications for practice guidelines. JAMA 1998;279:279:1452-57. https://reference.medscape.com/medline/abstract/9600479
- Metlay JP, Waterer GW, Long AC, et al. Diagnosis and treatment of adults with community-acquired pneumonia. Am J Respir Crit Care Med 2019;200:e45-e67. https://www.ncbi.nlm.nih.gov/pubmed/31573350
- Uranga A, Espana PP, Bilbao A, et al. Duration of antibiotic treatment in community-acquired pneumonia. A multicenter randomized clinical trial. JAMA Intern Med 2016;176:1257-65. https://www.ncbi.nlm.nih.gov/pubmed/27455166/
Under certain circumstances, you may need to! Although nonselective beta blockers (NSBBs), such as nadolol and propranolol, have been the cornerstone of medical treatment of portal hypertension in preventing variceal bleeding in patients with cirrhosis for decades, recent reports of their association with worsening survival, increased risk of hepatorenal syndrome and acute kidney injury in patients with refractory ascites or spontaneous bacterial peritonitis [SBP]) 1,2 have added controversy to their routine use in end-stage cirrhosis.
This is because patients with end-stage cirrhosis may be highly dependent on their cardiac output (particularly the heart rate) in maintaining an adequate arterial blood pressure 3-5 and the negative inotropic and chronotropic effects of NSBBs blunt this compensatory mechanism. The result is a drop in the cardiac output that may be particularly significant in the presence of conditions already associated with hypotension, such as sepsis, spontaneous bacterial peritonitis (SBP), or hemorrhage, further increasing the risk of renal hypoperfusion and hepatorenal syndrome.3
Although 2 meta-analysis studies failed to find an association between NSBBs and increased mortality among patients with cirrhosis and ascites, 6,7 serious concerns over the adverse effects of these drugs in at least a subset of patients has not waned. Some have recommended reducing NSBB dose or discontinuing treatment in patients with refractory ascites or SBP and any of the following parameters: 4
- Systolic blood pressure <90 mmHg
- Serum creatinine >1.5 mg/dL
- Hyponatremia <130 mmol/L
Similar recommendations were made by a 2015 consensus conference on individualizing the care of patients with portal hypertension. 8
In the absence of randomized-controlled studies, it seems prudent to proceed with more caution when using NSBBs in patients with end-stage cirrhosis and watch closely for any signs of hypotension or renal function deterioration.
- Serste T, Njimi H, Degre D, et al. The use of beta-lackers is associated with the occurrence of acute kidney injury in severe hepatitis. Liver In 2015;35:1974-82. https://www.ncbi.nlm.nih.gov/pubmed/25611961
- Mandorfer M, Bota S, Schwabl P, et al. Nonselective beta blockers increase risk of hepatorenal syndrome and death in patients with cirrhosis and spontaneous bacterial peritonitis. Gastroenterol 2014;146:1680-90. https://www.sciencedirect.com/science/article/pii/S0016508514003060?via%3Dihub
- Garcia-Tsao G. The use of nonselective beta blockers for treatment of portal hypertension. Gastroenterol Hepatol 2017;13: 617-19. http://www.gastroenterologyandhepatology.net/archives/october-2017/the-use-of-nonselective-beta-blockers-for-treatment-of-portal-hypertension/
- Reiberger T, Mandorfer M. Beta adrenergic blockade and decompensated cirrhosis. J Hepatol 2017;66: 849-59. https://www.ncbi.nlm.nih.gov/pubmed/27864004
- Giannelli V, Lattanzi, Thalheimer U, et al. Beta-blockers in liver cirrhosis. Ann Gastroenterol 2014;27:20-26. https://www.ncbi.nlm.nih.gov/pubmed/24714633
- Facciorusso A, Roy S, Livadas S, et al. Nonselective beta-blockers do not affect survival in cirrhotic patients with ascites. Digest Dis Sci 2018;63:1737-46. https://link.springer.com/article/10.1007%2Fs10620-018-5092-6
- Njei B, McCarty TR, Garcia-Tsao G. Beta-blockers in patients with cirrhosis and ascites: type of betablocker matters. Gut 206;65:1393-4. https://gut.bmj.com/content/gutjnl/65/8/1393.full.pdf
- De Franchis R. Expanding consensus in portal hypertension. Report of the Baveno VI Consensus Workshop: stratifying risk and individualizing care for portal hypertension. J Hepatol 2015;63:743-52. https://www.ncbi.nlm.nih.gov/pubmed/26047908
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