Critical Care Nursing Practice
History of Critical Care
Critical care evolved from the recognition that the needs of patients with acute, life-threatening illness or injury could be better met if the patients were organized in distinct areas of the hospital. In the 1800s, Florence Nightingale described the advantages of placing patients recovering from surgery in a separate area of the hospital. A three-bed postoperative neurosurgical intensive care unit was opened in the early 1900s at Johns Hopkins Hospital in Baltimore. This was soon followed by a premature infant unit in Chicago.1
Contemporary Critical Care
These nurses practice in a variety of settings: adult, pediatric, and neonatal critical care units; step-down, telemetry, progressive, or transitional care units; cardiac catheterization laboratories; and postoperative recovery units.2 Nurses are now considered to be knowledge workers because they are highly vigilant and use their intelligence and cognition to go past tasks in order to quickly pull together multiple data to make decisions regarding subtle and/or deteriorating conditions. Nurses work technically with theoretical knowledge.3
A growing trend in acute care settings is the designation of progressive care units, considered to be part of the continuum of critical care. In past years, patients who are placed on these units would have been exclusively in critical care units. However, with the use of additional technology and monitoring capabilities, newer care delivery models, and additional nurse education, these units are considered the best environment. The patients are less complex, more stable, have a decreased need for physiologic monitoring, and more self-care capabilities. They can serve as a bridge between critical care units and medical-surgical units, while providing high quality and cost effective care at the same time.4 Additionally, these progressive units can be found throughout the acute care setting, thus leaving critical care unit beds for those who need the highest level of care and monitoring.5
Critical Care Nursing Roles
Nurses provide and contribute to the care of critically ill patients in a variety of roles. The most prevalent role for the professional registered nurse is that of direct care provider. The American Association of Critical-Care Nurses (AACN) has delineated role responsibilities important for the critical care nurse5 (Box 1-1).
Advanced Practice Nurses
NPs and ACNPs manage direct clinical care of a group of patients and have various levels of prescriptive authority, depending on the state and practice area in which they work. They also provide care consistency, interact with families, plan for patient discharge, and provide teaching to patients, families, and other members of the health care team.6
Critical Care Professional Accountability
Professional organizations support critical care practitioners by providing numerous resources and networks. The Society of Critical Care Medicine (SCCM) is a multidisciplinary, multispecialty, international organization. Its mission is to secure the highest quality, cost-efficient care for all critically ill patients.1 Numerous publications and educational opportunities provide cutting-edge critical care information to critical care practitioners.
The organization most closely associated with critical care nurses is the AACN. It is the world’s largest specialty nursing organization and was created in 1969. AACN is focused on “creating a healthcare system driven by the needs of patients and their families, where acute and critical care nurses make their optimal contribution.”7 The top priority of the organization is education of critical care nurses. AACN publishes numerous materials, evidence-based practice summaries, and practice alerts related to the specialty and is at the forefront of setting professional standards of care.
AACN serves its members through a national organization and many local chapters. The AACN Certification Corporation, a separate company, develops and administers many critical care specialty certification examinations for registered nurses. The examinations are provided in specialties such as neonatal, pediatric, and for those who practice in diverse settings, such as critical care, progressive care, “virtual” ICU, or remote monitoring (e-ICU). Certification is considered one method to maintain high quality of care and to protect consumers of care and services. Research has demonstrated more positive outcomes when care is delivered by health care providers who are certified in their specialty.8 AACN also recognizes critical care and acute care units who achieve a high level of excellence through its Beacon Award for Excellence. The unit that receives this award has demonstrated exceptional care through improved outcomes and greater overall satisfaction. It reflects on a supportive overall environment, teamwork and collaboration, and distinguishes itself with lower turnover and higher morale.9
Evidence-Based Nursing Practice
Much of early medical and nursing practice was based on non-scientific traditions, intuition, and traditions. These traditions and rituals, which were based on folklore, gut instinct, trial and error, and personal preference, were often passed down from one generation of practitioner to another. Examples of non–scientific-based critical care nursing practice include Trendelenburg positioning for hypotension, use of rectal tubes to manage fecal incontinence, gastric residual volume and aspiration risk, accuracy of assessment of body temperature, and suctioning artificial airways every 2 hours—to name a few. In order to deliver the highest quality of care, EBP is essential and must be embraced by all nurses.10
The dramatic and multiple changes in health care and the ever-increasing presence of managed care in all geographic regions have placed greater emphasis on demonstrating the effectiveness of treatments and practices on outcomes. Emphasis is on greater efficiency, cost-effectiveness, quality of life, and patient satisfaction ratings. It has become essential for nurses to use the best data available to make patient care decisions and carry out the appropriate nursing interventions.10–11 By using an approach employing a scientific basis, with its ability to explain and predict, nurses are able to provide research-based interventions with consistent, positive outcomes. The content of this book is research-based, with the most current, cutting-edge research abstracted and placed throughout the chapters as appropriate to topical discussions.
The increasingly complex and changing health care system presents many challenges to creating an EBP. Appropriate research studies must be designed to answer clinical questions, and research findings must be used to make necessary changes for implementation in practice. Multiple EBP and research utilization models exist to guide practitioners in the use of existing research findings. One such model is the Iowa Model of Evidence-Based Practice to Promote Quality Care, which incorporates evidence and research as the bases for practice.12 Cullen and Adams describe a framework with four key phases to implement EBP: 1) create awareness and interest; 2) build knowledge and commitment; 3) promote action and adoption; and 4) pursue integration and sustained use. Each step has multiple strategies that will facilitate successful progression to the next phase. The authors indicate that this model is particularly suited to complex static organizations.11
Just as there has been such an exponential growth of EBP literature, reports, publications and acceptance, others are posing the question, “But at what cost?” Newhouse describes this as a complex issue to address and states that economists would go beyond the costs of human labor and materials in their analysis. Another way to evaluate this is to examine “whose” cost is being considered.13 More recently, a published article reported estimates of costs per event for several health-acquired conditions (HACs). The estimated cost of care for one catheter-associated urinary tract infection (CAUTI) was $758. A patient fall was estimated to be $4,233 per fall; and a surgical “never event” cost $62,000 per event. These are most likely underestimated; but it is easy to realize the tremendous impact of situations that should not occur because there is sufficient evidence to prevent such outcomes.14 Thus, inquisitive practitioners who strive for best practices using valid and reliable data will demonstrate quality outcomes-driven care and practices.
Evidence-based nursing practice considers the best research evidence on the care topic, along with clinical expertise of the nurse, and patient preferences. For instance, when determining the frequency of vital sign measurement, the nurse would use available research, nursing judgment (stability, complexity, predictability, vulnerability, and resilience of the patient),15 along with the patient’s preference for decreased interruptions and the ability to sleep for longer periods of time. At other times the nurse will implement an evidence-based protocol or procedure that is based on evidence, including research. An example of an evidence-based protocol is one in which the prevalence of indwelling catheterization and incidence of hospital-acquired catheter-associated urinary tract infections in the critical care unit can be decreased.16
The AACN has promulgated several EBP summaries in the form of a “Practice Alert.” These alerts are short directives that can be used as a quick reference for practice areas (e.g., oral care, noninvasive blood pressure monitoring, ST segment monitoring). They are succinct, supported by evidence, and address both nursing and multidisciplinary activities. Each alert includes the clinical information, followed by references that support the practice.17 An example of one of the alerts is found on in Box 1-2.