Guideline adherence among prehospital emergency nurses when caring for patients with chest pain: a prospective cohort study

Hypothetical interventions on emergency ambulance and prehospital acetylsalicylic acid administration in myocardial infarction patients presenting without chest pain

BACKGROUND

Myocardial infarction (MI) patients presenting without chest pain are a diagnostic challenge. They receive suboptimal prehospital management and have high mortality. To elucidate potential benefits of improved management, we analysed expected outcome among non-chest pain MI patients if hypothetically they (1) received emergency ambulances/acetylsalicylic acid (ASA) as often as observed for chest pain patients, and (2) all received emergency ambulance/ASA.

METHODS

We sampled calls to emergency and non-emergency medical services for patients hospitalized with MI within 24 h and categorized calls as chest pain/non-chest pain. Outcomes were 30-day mortality and a 1-year combined outcome of re-infarction, heart failure admission, and mortality. Targeted minimum loss-based estimation was used for all statistical analyses.

RESULTS

Among 5418 calls regarding MI patients, 24% (1309) were recorded with non-chest pain. In total, 90% (3689/4109) of chest pain and 40% (525/1309) of non-chest pain patients received an emergency ambulance, and 73% (2668/3632) and 37% (192/518) of chest pain and non-chest pain patients received prehospital ASA. Providing ambulances to all non-chest pain patients was not associated with improved survival. Prehospital administration of ASA to all emergency ambulance transports of non-chest pain MI patients was expected to reduce 30-day mortality by 5.3% (CI 95%: [1.7%;9%]) from 12.8% to 7.4%. No significant reduction was found for the 1-year combined outcome (2.6% CI 95% [- 2.9%;8.1%]). In comparison, the observed 30-day mortality was 3% among ambulance-transported chest pain MI patients.

CONCLUSIONS

Our study found large differences in the prehospital management of MI patients with and without chest pain. Improved prehospital ASA administration to non-chest pain MI patients could possibly reduce 30-day mortality, but long-term effects appear limited. Non-chest pain MI patients are difficult to identify prehospital and possible unintended effects of ASA might outweigh the potential benefits of improving the prehospital management. Future research should investigate ways to improve the prehospital recognition of MI in the absence of chest pain.

Clinical presentation in EMS patients with acute chest pain in relation to sex, age and medical history: prospective cohort study

OBJECTIVE

To assess symptom presentation related to age, sex and previous medical history in patients with chest pain.

DESIGN

Prospective observational cohort study.

SETTING

Two-centre study in a Swedish county emergency medical service (EMS) organisation.

PARTICIPANTS

Unselected inclusion of 2917 patients with chest pain cared for by the EMS during 2018.

DATA ANALYSIS

Multivariate analysis on the association between symptom characteristics, patients' sex, age, previous acute coronary syndrome (ACS) or diabetes and the final outcome of acute myocardial infarction (AMI).

RESULTS

Symptomology in patients assessed by the EMS due to acute chest pain varied with sex and age and also with previous ACS or diabetes. Women suffered more often from nausea (OR 1.6) and pain in throat (OR 2.1) or back (OR 2.1). Their pain was more often affected by palpation (1.7) or movement (OR 1.4). Older patients more often described pain onset while sleeping (OR 1.5) and that the onset of symptoms was slow, over hours rather than minutes (OR 1.4). They were less likely to report pain in other parts of their body than their chest (OR 1.4). They were to a lesser extent clammy (OR 0.6) or nauseous (OR 0.6). These differences were present regardless of whether the symptoms were caused by AMI or not.

CONCLUSIONS

A number of aspects of the symptom of chest pain appear to differ in unselected prehospital patients with chest pain in relation to age, sex and medical history, regardless of whether the chest pain was caused by a myocardial infarction or not. This complicates the possibility in prehospital care of using symptoms to predict the underlying aetiology of acute chest pain.

Ambulance nurses' experiences of using prehospital guidelines for patients with acute chest pain - A qualitative study

BACKGROUND

Ambulance nurses have an important role in early recognition and treatment often being the first medical contact for patients with acute chest pain. However, there is sparse knowledge on the experiences of ambulance nurses with regard to use of Prehospital Guidelines for patients with Acute Chest Pain.

AIM

To explore ambulance nurses' experiences of using prehospital guidelines for patients with acute coronary syndrome.

METHOD

A qualitative descriptive study design. Semi-structured interviews with 22 ambulance nurses recruited through purposive sampling strategy. The material was transcribed and analysed using content analysis.

RESULTS

Two main categories emerged from the results. The first category Sense of professional obligation included experiences of having an important role in caring for patients with acute chest pain. Understanding this role and the collaboration in the chain of care prompted ambulance nurses to adhere to the guidelines. However, not receiving enough feedback on the provided care made them uncertain whether to use guidelines. The second category Clinical difficulties using guidelines consisted of experiences of being surrounded by practical challenges while using guidelines. Ambulance nurses meet these challenges by relying on their clinical experience, which sometimes led to them deviating from the guidelines.

CONCLUSIONS

The ambulance nurses experienced a mixture of feeling secure and insecure when using the guidelines. Foremost, when encountering patients with unspecific chest pain, they felt a lack of feedback and an insufficient collaboration within the chain of care, which made them deviate from guidelines. To increase adherence in guidelines, post-registration education to update the knowledge and skills about guidelines for acute chest pain is needed followed by formal inter-disciplinary feedback on the care provided.