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Perioperative pain management intervention in older patients with hip fracture in an orthogeriatric unit. A controlled before/after study assessing an audit and feedback intervention (PAIN-AGE)
BMC Geriatrics volume 24, Article number: 735 (2024)
Abstract
Background
Postoperative pain delays ambulation, extends hospital stay, reduces the probability of recovery, and increases risk of long-term functional impairment. Pain management in hip fractured patients poses a challenge to the healthcare teams. Older adults are more vulnerable to opioid-associated side effect and it is primordial to minimize their exposure to opioids. Acetaminophen is associated with reduced opioid use so we need to focus on acetaminophen use in first-line analgesia.
Methods
We conducted a controlled before/after study to assess the ability of an audit and feedback (A&F) intervention built with nurses to improve the quality of perioperative pain management in older patients hospitalized for hip fracture in an orthogeriatric unit (experimental group) versus a conventional orthopedic unit (no A&F intervention). The primary endpoint was the percentage of patients who received 3 g/day of acetaminophen during the three postoperative days, before and after the A&F intervention. Secondary endpoints included nurses’ adherence to medical prescriptions, clinical data associated with patients and finally factors associated with intervention. The significative level was set at 0.05 for statistical analysis.
Results
We studied data from 397 patients (mean age 89 years, 75% female). During the postoperative period, 16% of patients from the experimental group received 3 g/day of acetaminophen before the A&F intervention; the percentage reached 60% after the intervention. The likelihood of receiving 3 g/day of acetaminophen during the postoperative period and adhering to the medical prescription of acetaminophen were significantly increased in the experimental group as compared with the control group. The patient’s functional status at discharge (assessed by Activities of Daily Living scores) was significantly better and the length of hospital stay significantly reduced after the A&F intervention.
Conclusion
Our controlled before/after study showed that an A&F intervention significantly improved perioperative pain management in older adults hospitalized for hip fracture. Involving teams in continuous education programs appears crucial to improve the quality of pain management and ensure nurses’ adherence to medical prescriptions.
Background
Pain management in hip fractured patients poses a challenge to the healthcare teams. Postoperative pain has been identified as an unfavorable prognostic factor [1, 2]. Pain delays ambulation, extends hospital stay, reduces the probability of recovery, and finally increases risk of long-term functional impairment [3]. Pre- and postoperative (perioperative) pain management is based on multimodal analgesia that consists of the use of several analgesic medications and techniques combined with non-pharmacological interventions [4,5,6]. Multimodal analgesia improves perioperative pain management and reduces analgesic doses leading to a reduction in the incidence of adverse events [7, 8].
Acetaminophen (or Paracetamol) is an effective analgesic for musculoskeletal pain and represents the front-line therapy for the management of pain in the geriatric population, especially during perioperative periods [9, 10]. Acetaminophen is safe despite old age and associated polypharmacy and polymorbidity [11]. Acetaminophen is recommended as part of the multimodal analgesia [4, 12]. It is the only analgesic that brings a morphine-sparing effect compared to other analgesics such as non-steroidal anti-inflammatory drugs [7, 13]. Its systematic administration following a preestablished protocol is preferred to administration on demand [14]. Older adults are more vulnerable to opioid-associated side effect and it is primordial to minimize their exposure to opioids. Acetaminophen increases the efficacy of oxycodone in adults confronted with acute moderate to severe perioperative pain [13]. Acetaminophen is associated with reduced opioid use so we need to focus on acetaminophen use in first-line analgesia [15]. Learned societies recommend assessment, prevention, and management of perioperative pain. Nurses play a crucial role in this perioperative pain management. By providing care to patients, they serve as the essential link between patients and physicians, ensuring the proper implementation of prescribed treatments.
Pain in older adults is historically neglected [16]. The atypical presentation of pain in older adults is one of the limits leading to underdiagnosed and undertreated pain [17, 18]. The lack of knowledge and inadequate pain assessment have been clearly identified as barriers to optimal pain management [19, 20]. In the new era of modernization of analgesic techniques, the adherence to basic analgesic prescription remains poorly described, particularly for older patients hospitalized for a hip fracture [21]. Acetaminophen is the most frequently administered analgesic (28% to 61%) in hip-fractured patients [22, 23]. However, undertreatment with acetaminophen is common [23]. According to a local pilot study, less than 30% of older patients receive the optimum dose of acetaminophen during the perioperative period.
We hypothesize that patients aged 75 years or more (75 +) hospitalized for a hip fracture do not receive optimal management of pain in the perioperative period, in particular do not receive optimal acetaminophen treatment. Our multimodal Audit & Feedback (A&F) intervention was to improve the quality of hip fracture pain management in 75 + . Our study (PAIN-AGE) was to evaluate the impact of our A&F intervention. The primary endpoint was the percentage of patients who received 3 g/day of acetaminophen during the three postoperative days, before and after the A&F intervention. Our secondary objectives evaluated clinical practices of perioperative pain management, nurses’ adherence to medical prescriptions, the impact of the A&F intervention on patients’ outcomes and factors associated with intervention.
Methods
Design
We performed a controlled before/after study (quasi-experimental study) to evaluate the impact of an A&F intervention carried out with nurses (Fig. 1).
Study design. We performed a controlled before/after study (quasi-experimental study) to evaluate the impact of an A&F intervention carried out with nurses. Experimental group is represented in the area with till points. Control group is represented in the white area. Before and After concern the period before and after the A&F intervention. Abbreviations: OG: orthogeriatric unit; CO: conventional orthopedic unit
We evaluated 1/ the impact of the A&F intervention on nurses’ practices with acetaminophen distribution and nurses’ adherence to prescribed pain medications and 2/ the impact of the A&F intervention on patients’ outcomes with complications occurring during hospital stay in a cohort of 75 + admitted for hip fracture to an orthogeriatric unit (experimental group). Results were compared with those of a conventional orthopedic unit (control group) with no A&F intervention. The purpose of the control group was to ensure that the changes observed in the experimental group did not result from other organizational elements or from any events occurring between the two periods.
Intervention
A multimodal intervention including A&F was built with nurses [24]. The A&F intervention which included a pre- and post-intervention audit was implemented in the orthogeriatric unit, starting on May 2019 (Fig. 2).
The postintervention audit was associated with feedback. Between the two audits, several practical actions were implemented in the experimental unit. Firstly, healthcare workers were trained on the theme of pain (two 1-h collective sessions) by a medical doctor and the Pain Center nurse. The course included four parts entitled “knowledge about pain” (definition and pathophysiology), “pain assessment and tools”, “pain treatment”, and “specificity of pain in older patients”. The consequences of inadequate perioperative pain management were presented [20]. We used a positive approach of errors. Secondly, a pain assessment scale was distributed. Thirdly, the existing pain management protocol was updated with a specific mention: “give acetaminophen regardless of pain assessment”. Fourthly, the medicine staffing was reviewed in collaboration with the clinical pharmacy unit. Fifthly and finally, continuation of care was guaranteed by the implementation of standby night and weekend shift, and the implementation of a medical ward round on Saturday morning. No A&F intervention was implemented in the conventional orthopedic unit (control group).
Setting
The study took place in the Grenoble Alpes University Hospital (France): the orthogeriatric unit was located in the North hospital and the conventional orthopedic unit in the South hospital. The orthogeriatric unit (experimental group) belongs to the orthopedic and traumatological surgery department. It receives patients from the emergency department. There is a daily comanagement between orthopedic surgeons, anesthesiologists, and geriatricians for perioperative care. In this unit, a set of standard pain assessment and management protocols are employed. This set consists of the following: (1) pain assessment through a numerical scale or visual analog scale (VAS) performed systematically 3 times a day and then repeated as many times as necessary; (2) non-pharmacological pain management included during the preoperative period: the limitation of the movements of the traumatized limb by aligning it properly, blocking rotations by avoiding muscular contractions of the traumatized limb, mobilization by trained paramedical teams, and ice during perioperative period; (3) routine prescription of 1 g of acetaminophen 3 times a day, and 5 mg per os of oxycodone (or equivalent) systematically distributed in the morning, before the nursing and the mobilization procedures; (4) conditional prescription of strong opioids based on pain intensity during all day. A pain intensity level greater than 6 induces opioid use. Data tracking of the numerical scale of prescriptions and analgesics given was performed by nursing staff. In the conventional orthopedic unit, no analgesic prescription protocol was used.
Participant patients
The study consecutively included 75 + hospitalized with hip fracture. The recruitment period lasted from December 2018 to April 2020. Patients were excluded in case of death before the surgery, admission after the surgery, multiple concomitant fractures, metastatic fractures, or functional management of the fracture. Patients who stayed less than 48 h in the unit or under any form of legal protection, or without collected data were also excluded from the study. Other reason such as acetaminophen allergy, early orthopedic complications (luxation within 48 h) could lead to study exclusion.
Data
The following data were collected during hospitalization in the medical report. The data were retrospectively gathered for the study from 01 January 2020 to 30 April 2021 by a clinical research associate: demographic characteristics (sex, age), fracture and surgery characteristics (type of fracture, type of surgery, type of anesthesia), preoperative delay (hours), medical history (comorbidities and treatments), standard geriatric measures such as scores to 6-point functional status according to the Katz’s Activities of Daily Living scale (ADL) [25] and the 8-point Lawton’s Instrumental Activities of Daily Living scale (IADL) [26], the 6-point American Society of Anesthesiologists score (ASA), the 56-point Cumulative Illness Rating Scale – Geriatric (CIRS-G) [27], the 24-point Charlson index score. Pain was assessed using 10-point VAS or numerical rating scale (NRS) [28]. All complications occurring during the hospital stay were collected including pain, delirium, anemia, bleeding, infection, fibrillation, stroke, myocardial infarction, thromboembolic event, stool impaction, urinary retention, pressure ulcer, dehydration, acute renal failure, and death. Functional status at discharge was assessed by ADL, and functional decline was calculated using the ADL score before the hip fracture (Day -15) and at discharge. For strong opioids, administered doses were calculated in mg/day of morphine equivalent using conversion factors [29]. For psychotropic drugs, distributed benzodiazepine (oxazepam) and hypnotic drugs were considered.
Statistics
Based on a pilot study, the primary endpoint (percentage of patients who received 3 g/day of acetaminophen each day during the perioperative period) was achieved in 30% of patients. To demonstrate a 20% improvement in this proportion, with a risk of statistical error of 0.05 in a two-sided situation and a power of 0.90, a sample of 248 patients (124 patients in each group) was required.
Study data were collected through patient electronic records using Cristalnet and Easily software. Descriptive analysis was conducted on all collected variables, and on the total population collected. The primary analysis employed a difference-in-difference approach to investigate the first-order interaction between group (experimental versus control) and time (before versus after the A&F intervention) on the primary endpoint outcome (percentage of patients who received routine acetaminophen treatment). This was accomplished using a logistic regression model for independent binary variables. The crude interaction coefficient was then adjusted for baseline patient characteristics in a multivariate model to account for potential confounders. The baseline characteristics introduced in the model were selected by comparing the two groups at the two times of the study by association tests (Kruskal Wallis test for continuous variables or Chi2 test for nominal variables). The same analysis looking for an interaction between group and time was performed for each of the secondary criteria. Odds ratios (ORs) were adjusted on age, sex, and type of fracture. Qualitative parameters were expressed in numbers and percentages. Quantitative parameters were described by the median with the 25th and 75th percentiles. Analysis was performed using data processed in Excel 2019 for PC, and statistics were performed with Stata Version 14.0 software (Stata Corporation, College Station, TX, USA). The significative level was set at 0.05.
Ethics
The study followed CNIL (National Commission on Informatics and Liberty, France) and RGPD (General Data Protection Regulation) recommendations. Study registration within the internal register for processing activities of the Data Protection Officer controller was performed prior to Clinical Research and Innovation Delegation approval (MR 4914030220). Our hospital ethics committee approved this study and authorized waived informed consent since the study was observational. Patients and their families were informed about the study and could refuse to participate.
Results
A total of 719 patients were screened to be included in this controlled before/after study. Of these, 397 were included: 99 before A&F intervention and 100 after A&F intervention in the experimental group, and 100 before A&F intervention and 98 after the A&F intervention in the control group (Fig. 3).
The median age of the included patients was 89 in the experimental group and 85 in the control group. Patients were mainly women (from 67 to 76% according to the group and the period). Patients in the experimental group were multimorbid and dependent. Patients frequently presented with femoral neck fracture. Detailed characteristics are presented in Table 1.
During the preoperative period, 9% of patients from the experimental group received 3 g/day of acetaminophen before the A&F intervention and 16% after the A&F intervention, without significant statistical difference (p = 0.13) (Table 2).
During the postoperative period, 16% of patients from the experimental group received 3 g/day of acetaminophen before the A&F intervention; the percentage reached 60% after the A&F intervention (OR = 8.55 [4.29;17.03]; p < 0.001). In the control group, no change in the distribution of acetaminophen was observed after the A&F intervention, neither in the preoperative (p = 0.76) nor in the postoperative period (p = 0.43). After the A&F intervention, the likelihood of receiving 3 g/day of acetaminophen during the postoperative period was significantly increased in the experimental group as compared with the control group (OR = 6.76 [2.7;16.9]; p < 0.001). During the preoperative period, nurses’ adherence to the medical prescriptions of acetaminophen was 13% in the experimental group before the A&F intervention and 32% after the A&F intervention (p = 0.001). During the postoperative period, it was 13% in the experimental group before the A&F intervention, but reached 52% after the A&F intervention (p < 0.001). The likelihood of adhering to medical prescription of acetaminophen was significantly increased in the experimental group as compared with the control group (OR = 20.34 [4.4;94.05], p < 0.001). In the experimental group, the number of in-hospital VAS recorded slightly decreased after the A&F intervention (p = 0.02). The strong opioid distribution during the pre and postoperative periods did not differ after the A&F intervention. In the preoperative period, the distribution of benzodiazepine significantly decreased after the A&F intervention (p = 0.007); it was not significantly modified after the A&F intervention during the postoperative period (p = 0.33).
The complication rates were not different before and after the A&F intervention (Table 3).
The functional status at discharge according to ADL score was better after the A&F intervention (p = 0.008) in the experimental group, and the length of stay significantly decreased by 2.5 days (p = 0.002).
Discussion
Our controlled before/after study showed that an A&F intervention significantly improved perioperative pain management in older adults hospitalized for hip fracture. After the A&F intervention, the likelihood of receiving 3 g/day of acetaminophen during the postoperative period was significantly increased and the nurses’ adherence to medical prescriptions based on acetaminophen prescription improved. In addition, the functional status at discharge according to ADL score was better after the A&F intervention and the length of stay in the orthogeriatric unit significantly shorter.
Our study presented several limitations. Firstly, the control group experienced a high rate of missing data due to conventional care without specific geriatric management and data collection. However, the missing data did not involve data of pain management (Table 2). Additionally, the perioperative complication rates did not decrease following the A&F intervention. However, it is important to note that the study was not designed to measure complication outcomes. A dedicated study should be conducted to assess the impact of the A&F intervention on complications. Finally, in contrast to other studies [30], we examined both prescription and medication distribution, thus considering the behaviors of both doctors and nurses.
In our study, acetaminophen distribution rate was extremely low and far from 100%. Several barriers to optimal pain control have been described with four distinct areas: healthcare system; physicians; nurses; patients [20, 31, 32]. Pain undertreatment usually affects the old-old and those with cognitive impairment [33]. Our study assessed the management of an acute and foreseeable pain, in an established traumatic context, in older adults, with routine medical prescription leaving no room for interpretation. The major finding was the gap between analgesic prescription and drug distribution with a real lack of adherence to medical prescriptions. Acetaminophen was usually prescribed and nurse’s adherence to medical prescription was low. This gap has been known for a long time in the postoperative period in such context. Two thirds of patients received less than 50% of the prescribed non-opioid analgesic [33] and the administration of combination of drugs (i.e., acetaminophen with opioids) is low [34]. Strong opioids distribution in patients aged over 65 years and hospitalized for a hip fracture is lower than the dose prescribed [33]. Nurses are responsible for treatment distribution and administration; their poor knowledge leads to their non-adherence to good clinical practices [20]. Comprehensive knowledge encompasses both pain assessment and pain management [32].
Pain assessment and management could be improved by improving nurse’s knowledge and attitudes [32, 35, 36]. Education programs may exert a positive impact on nurses’ attitude toward pain management [37, 38]. Our study directly measured the effect of our multimodal intervention on nurses’ attitudes and practices. The distribution of pain medication was greatly increased in the postoperative period thanks to our A&F intervention. Strong opioid distribution did not decrease following the A&F intervention, but our study did not aim to compare optimal pain management with non-optimal pain management. Furthermore, this could be a sign of the good quality of care in the unit. In a recent study [39], we demonstrated that 75 + with or without cognitive deficits or delirium hospitalized for a hip fracture in an orthogeriatric unit received the same daily average quantity of strong opioids during the preoperative period. The standard pain management in an orthogeriatric unit avoids the undertreatment of pain in patients with moderate to strong cognitive deficits.
Functional status at discharge was better. The A&F intervention improved pain management and thus enhanced patients’ mobility during hospital stay. The functional recovery was facilitated and we could link the pain management to clinical usefulness of patients. The length of stay (LOS) decreased in the two groups. A better functional status may be associated with a reduction of LOS but external factors may have influenced this data (availability of rehabilitation center…).
Despite the A&F intervention, the rate of nurses’ adherence to medical prescriptions remained insufficient. Dihle reported that nurses did not always use their knowledge in clinical practice, which led to a huge gap between “what nurses say and what nurses do” [34]. This constitutes a barrier to an optimal postoperative pain management. Educational interventions succeed in improving knowledge and practices but their impact on health provider’s beliefs is controversial [35]. Subconscious barriers have been described [40], leading to a gap “between the nurses’ own perceptions about how they dealt with postoperative pain management and how they actually performed it in the clinical setting” [34]. Secondly, the A&F intervention failed in the preoperative period.
Conclusions
By demonstrating that less than one quarter of patients received the optimal dosage of acetaminophen despite routine medical prescription, this study is an opportunity to question ourselves about our practices from prescription to administration including medication circuit, and to raise awareness of healthcare providers about this alarming issue. The management of pain is still not up to the mark. Defining clinical practice guidelines or pain action plan is not sufficient. In contrast to the opioid crisis, our challenge is not excessive use, but rather the underuse of a front-line medication named acetaminophen. It might be referred to as an "acetaminophen crisis". Our A&F intervention could potentially be used by other healthcare team managers to develop practice assessment in their own unit and pain education program. Team involvement in continuous education seems to be a key determinant of pain management quality and more studies are needed to assess factors associated with an optimal pain management in traumatized older adults.
Availability of data and materials
The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.
Abbreviations
- A&F:
-
Audit and Feedback
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Acknowledgements
We thank the University Hospital Grenoble Alpes for the funding. We thank Fabienne Peretz for editorial assistance.
Funding
The University Hospital Grenoble Alpes funded the study.
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SD: Conceptualization (C), Funding Acquisition (FA), Project Administration (PA), Methodology (M), Supervision (S), Investigation (I), Formal analysis (Fa), Validation (Va) Visualization (V), Writing original Draft, Writing – Review-Editing (WRE); BB (M, Fa, Software (S), Data curation (DC), Va, M,V, WRE); AG (M, DC, S,V); AB (I, WRE) FO (I,V); MR (I, M,V); LM (I,V); AG (I, Fa,V); CM (M,V); RP (I, V); BRD (I, V); PB (C, I, V); JT (C, I, V); CB (I, V, R); GG (C, M, ID, M, V, WRE); PF (M, M, V); PG (M, I, M, V, WRE).
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The study followed CNIL (National Commission on Informatics and Liberty, France) and RGPD (General Data Protection Regulation) recommendations. Study registration within the internal register for processing activities of the Data Protection Officer controller was performed prior to Clinical Research and Innovation Delegation approval (MR 4914030220). Our hospital ethics committee approved this study and authorized waived informed consent since the study was observational. Patients and their families were informed about the study and could refuse to participate.
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Drevet, S., Boussat, B., Grevy, A. et al. Perioperative pain management intervention in older patients with hip fracture in an orthogeriatric unit. A controlled before/after study assessing an audit and feedback intervention (PAIN-AGE). BMC Geriatr 24, 735 (2024). https://doi.org/10.1186/s12877-024-05282-w
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DOI: https://doi.org/10.1186/s12877-024-05282-w