RESUMO
S(p)O(2) is routinely used to assess the well-being of patients, but it is difficult to find an evidence-based description of its normal range. The British Thoracic Society (BTS) has published guidance for oxygen administration and recommends a target S(p)O(2) of 94-98% for most adult patients. These recommendations rely on consensus opinion and small studies using arterial blood gas measurements of saturation (S(a)O(2)). Using large datasets of routinely collected vital signs from four hospitals, we analysed the S(p)O(2) range of 37,593 acute general medical inpatients (males: 47%) observed to be breathing room air. Age at admission ranged from 16 to 105 years with a mean (SD) of 64 (21) years. 19,642 admissions (52%) were aged <70 years. S(p)O(2) ranged from 70% to 100% with a median (IQR) of 97% (95-98%). S(p)O(2) values for males and females were similar. In-hospital mortality for the study patients was 5.27% (range 4.80-6.27%). Mortality (95% CI) for patients with initial S(p)O(2) values of 97%, 96% and 95% was 3.65% (3.22-4.13); 4.47% (3.99-5.00); and 5.67% (5.03-6.38), respectively. Additional analyses of S(p)O(2) values for 37,299 medical admissions aged ≥18 years provided results that were distinctly different to those upon which the current BTS guidelines based their definition of normality. Our findings suggest that the BTS should consider changing its target saturation for actively treated patients not at risk of hypercapnic respiratory failure to 96-98%.
Assuntos
Tratamento de Emergência , Oxigenoterapia/normas , Oxigênio/sangue , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Guias de Prática Clínica como Assunto , Adulto JovemRESUMO
This article describes how the introduction of an acuity and dependency tool at University Hospitals Coventry and Warwickshire NHS Trust has provided nurses with a structure for gathering evidence about patient care levels, and discusses how this information is shared throughout the trust to improve patient outcomes and safety.