2 Safe and effective post-operative pain relief: introduction and continuous quality-improvement of comprehensive post-operative pain management programmes

The Effects of Photobiomodulation Therapy on Post-Surgical Pain

Introduction: One of the major complains after surgery is pain. Recent advances in the prevention and reduction of postoperative pain have provided several modalities. One of them is the use of laser irradiation on the surgical area. Objectives: To evaluate the effects of low level laser therapy (LLLT) on pain and side effects after surgery. Methods: In this research, databases such as: PubMed, Science Direct, Google Scholar, Springer and Cochrane were used and the words of laser therapy, photobiomodulation, therapeutic laser, low level laser therapy, surgery and pain were searched. Articles, including systematic reviews, original articles, case series, and clinical intervention studies related to these words, were studied. The language of all articles was English and consists of papers from 2009 until 2017. Results: A total of 370 papers were studied and 10 articles that met inclusion criteria were selected for this review. Few of these articles were followed up. Surgery included a wide range of surgeries including mastectomy, breast augment post-fracture, episiotomy, tonsillectomy and hernia. The methodological quality score on the PEDro scale was between 5 and 11. 8 trials reported positive effects and 2 trials reported negative effects. In order to study clinical effect size of laser therapy after surgery, only 4 papers met entry criteria and the mean effect sizes were 0.13 to 2.77. Accordingly, the best treatment protocol included a red laser dose of 4 J/cm2 for the post-operative pain of tonsillectomy, which was irradiated through the infra mandibular angle on the tonsils. Conclusion: LLLT may be an appropriate modality for reducing pain after surgery, nevertheless the effect size of this modality is variable. Therefore, further research based on proper protocols for these patients and follow-up of therapeutic course should be designed and implemented.

Postoperative pain documentation in a hospital setting: A topical review

Background and aims

Nursing documentation supports continuity of care and provides important means of communication among clinicians. The aim of this topical review was to evaluate the published empirical studies on postoperative pain documentation in a hospital setting.

Methods

The review was conducted through a systematic search of electronic databases: Web of Science, PubMed/Medline, CINAHL, Embase, Ovid/Medline, Scopus and Cochrane Library. Ten studies were included. Study designs, documented postoperative pain information, quality of pain documentation, reported quality of postoperative pain management and documentation, and suggestions for future research and practice improvements were extracted from the studies.

Results

The most commonly used study design was a descriptive retrospective patient record review. The most commonly reported types of information were pain assessment, use of pain assessment tools, useof pain management interventions, reassessment, types of analgesics used, demographic information and pain intensity. All ten studies reported that the quality of postoperative pain documentation does not meet acceptable standards and that there is a need for improvement. The studies found that organization of regular pain management education for nurses is important for the future.

Conclusions

Postoperative pain documentation needs to beimproved. Regular educational programmes and development of monitoring systems for systematic evaluation of pain documentation are needed. Guidelines and recommendations should be based on the latest research evidence, and systematically implemented into practice.

Implications

Comprehensive auditing tools for evaluation of pain documentation can make quality assessment easier and coherent. Specific and clear documentation guidelines are needed and existing guidelines should be better implemented into practice. There is a need to increase nurses’ knowledge of postoperative pain management, assessment and documentation. Studies evaluating effectiveness of high quality pain documentation are required.

Improving the management of post-operative acute pain: priorities for change

Poor management of post-operative acute pain can contribute to medical complications including pneumonia, deep vein thrombosis, infection and delayed healing, as well as the development of chronic pain. It is therefore important that all patients undergoing surgery should receive adequate pain management. However, evidence suggests this is not currently the case; between 10% and 50% of patients develop chronic pain after various common operations, and one recent US study recorded >80% of patients experiencing post-operative pain. At the first meeting of the acute chapter of the Change Pain Advisory Board, key priorities for improving post-operative pain management were identified in four different areas. Firstly, patients should be more involved in decisions regarding their own treatment, particularly when fateful alternatives are being considered. For this to be meaningful, relevant information should be provided so they are well informed about the various options available. Good physician/patient communication is also essential. Secondly, better professional education and training of the various members of the multidisciplinary pain management team would enhance their skills and knowledge, and thereby improve patient care. Thirdly, there is scope for optimizing treatment. Examples include the use of synergistic analgesia to target pain at different points along pain pathways, more widespread adoption of patient-controlled analgesia, and the use of minimally invasive rather than open surgery. Fourthly, organizational change could provide similar benefits; introducing acute pain services and increasing their availability towards the 24 hours/day ideal, greater adherence to protocols, increased use of patient-reported outcomes, and greater receptivity to technological advances would all help to enhance performance and increase patient satisfaction. It must be acknowledged that implementing these recommendations would incur a considerable cost that purchasers of healthcare may be unwilling or unable to finance. Nevertheless, change is under way and the political will exists for it to continue.

Post-operative pain treatment in Denmark from 2000 to 2009: a nationwide sequential survey on organizational aspects

BACKGROUND

In Denmark, the first acute pain service (APS) was introduced in 1993. An important objective became to facilitate implementation of accelerated post-operative rehabilitation programmes (ACC) in selected procedures in abdominal, gynaecological and orthopaedic surgery. Therefore, it is of considerable interest to study the association between the developments of post-operative pain management and the ACC by sequential analyses from 2000 to 2009.

METHODS

In 2000, 2003, 2006 and 2009, a questionnaire was mailed to all Danish anaesthesiology departments. The headings of the questionnaire were demographics of responder departments, resources allocated to pain management methods, quality assessment methods, research activities and implementation of ACC.

RESULTS

The responder rates varied between 80% and 94% (mean 88%) representing a mean number of anaesthetics of 340.000 per year. The number of APSs in the study period varied in university hospitals between 52% and 71% (P = 0.01), regional hospitals between 8% and 40% (P < 0.01), and local hospitals between 0% and 47% (P < 0.01). The prevalences of departments actively engaged in ACC were 40% in 2000, 54% in 2003, 73% in 2006 and 80% in 2009 (P < 0.01).

CONCLUSIONS

The study, spanning nearly a decade, illustrates that following an increase in number of APSs from 2000 to 2006, followed by a significant decline, a steadily increasing number of departments implemented ACC.

Economic Evaluations of Acute Pain Service Programs

OBJECTIVE

The purpose was to review the literature on the economic benefits associated with Acute Pain Service (APS) programs systematically. APSs have received widespread acceptance and formal support from institutions and organizations, but little is known about its economic benefits.

METHODS

MEDLINE and other databases were searched for economic evaluations of APSs. The study characteristics and methodological quality was assessed using standardized tools. All costs were adjusted to 2005 US dollars.

RESULTS

Ten economic evaluations (involving 14,774 patients) were identified that met eligibility criteria. There were wide variations in study designs, methodological quality, and outcome measures. There was insufficient data to identify which APSs model (anesthesiologist-based/nursing support or nurse-based/anesthesiologist supervised) was more cost-effective. The cost of APSs for surgical patients from direct and indirect effects (improved pain management from education in patients not receiving APS) varied from $2.28 to $5.08/patient/d. The level of evidence to support the cost-savings associated with APSs (shorter duration of intensive care unit and hospital stays) were limited to partial economic analyses. There was insufficient evidence to draw conclusions about the cost-effectiveness and cost-benefit of APSs as the quality of life and patient's willingness to pay for an APS intervention were not measured, respectively. The overall quality of published economic evaluations of APSs was poor.

CONCLUSIONS

There is a lack of high-quality economic studies to support the cost-effectiveness and cost-benefits of APSs.

Advantages and disadvantages of adrenaline in regional anaesthesia

Adrenaline has been added to local anaesthetic solutions for more than a century. The aim has been to delay the absorption of the local anaesthetic drug and to prolong and enhance its anaesthetic effect, both in peripheral and central neuraxial blockades. The intention in this chapter has been to give up-to-date knowledge about adrenaline as an adjuvant to local anaesthetics and/or opioids in clinical peripheral and central blockades. My own research has focused on optimizing postoperative epidural analgesia by adding adrenaline and/or fentanyl to an epidural mixture with dilute bupivacaine or ropivacaine. The main part of this chapter will therefore focus on the advantages and disadvantages of adrenaline in epidural analgesia. However, recent knowledge about adrenaline in peripheral blockade will also be covered, together with some pharmaceutical comments on the shelf-life of local anaesthetic mixtures containing adrenaline.

Making Progress in the Management of Postoperative Pain: A Review of the Cyclooxygenase 2–Specific Inhibitors

Postoperative pain is one of the most common forms of acute pain. Optimal pain management decreases the stress response to surgery, reduces complications, improves recovery time, and results in improved economic and quality-of-life outcomes. A preoperative, multimodal approach to postoperative analgesia can be achieved through a combination of therapies that continue beyond the immediate perioperative time frame. This multimodal approach provides superior analgesia with opioid-sparing effects and reduced opioid-related adverse events. Although the use of nonspecific nonsteroidal antiinflammatory drugs in a surgical setting has been limited owing to concerns of renal and gastrointestinal complications as well as platelet dysfunction, cyclooxygenase (COX)-2-specific inhibitors appear to be safe and effective alone and in combination with opioids for a variety of surgical procedures. The COX-2-specific inhibitors may have an important role in extending the use of balanced, multimodal analgesia to a broad surgical population, thus ultimately improving patient outcomes after surgery.

Assessing Analgesia in Single and Repeated Administrations of Propacetamol for Postoperative Pain: Comparison with Morphine After Dental Surgery

We conducted this double-blinded, randomized study to assess the analgesic effect of repeated administrations of paracetamol, administered as propacetamol, an injectable prodrug formulation of paracetamol, and to compare this with the analgesic effects of morphine. Patients experiencing moderate to severe pain after elective surgical removal of bone-impacted third-molar teeth under general anesthesia were randomly assigned to receive IV propacetamol 2 g (n = 31), IM morphine 10 mg (n = 30), or placebo (n = 34). Five hours later, the treatments were readministered at half of the previous dosages. Standard measures of analgesia were collected repeatedly for 10 h. Propacetamol and morphine were significantly more effective than placebo in all primary measures of analgesia over 5 h after the first administration and globally over 10 h (first and second administrations). After the first dose, 21 of the 34 patients in the placebo group required rescue medication, compared with 6 of the 31 in the propacetamol group (P < 0.0009) and 4 of the 30 in the morphine group (P < 0.0001). No statistically or clinically significant differences were found between propacetamol and morphine for any sum or peak measures of analgesia. No serious adverse events were reported; adverse events were significantly less frequent in the propacetamol group than in the morphine group (P < 0.027). Propacetamol administered IV in repeated doses (2 g followed by 1 g) has a significant analgesic effect that is indistinguishable from that of morphine administered IM (10 mg followed by 5 mg) after dental surgery, with better tolerability.

IMPLICATIONS

After moderately painful surgical procedures, IV paracetamol, administered as propacetamol, may be an asset in the control of acute postoperative pain.

Consent and anaesthetic risk

The incidences of mortality and morbidity associated with anaesthesia were reviewed. Most of the published incidences for common complications of anaesthesia vary considerably. Where possible, a realistic estimate of the incidence of each morbidity has been made, based on the best available data. Perception of risk and communication of anaesthetic risk to patients are discussed. The incidences of anaesthetic complications are compared with the relative risks of everyday events, using a community cluster logarithmic scale, in order to place the risks in perspective when compared with other complications and with the inherent risks of surgery. Documentation of these risks and discussion with patients should allow them to be better informed of the relative risks of anaesthetic complications. Depending on specific comorbidities and the severity of operation, these risks associated with anaesthesia may increase for any one individual.

[Evaluation of 5 years of postoperative pain management in orthopaedic surgery, in a private hospital, following quality standard management]

OBJECTIVE

To report the 5 years' experience of a postoperative pain service according to quality standards management.

MATERIAL AND METHODS

The goals of pain treatment were determined from the description of the initial inquiries performed in 1994. Decrease in the postoperative pain for all the patients operated at the first and the third postoperative day, systematic evaluation of the pain, implementation of common therapeutic protocols, information and satisfaction of the patients, improvement in side effects' management, and a bearable managing cost. The deadline of these objectives was 1999. Patients were followed-up by a questionnaire at the third postoperative day, by verbal scale scoring every 4 h, by reporting techniques and analgesic drugs, and side effects. An audit of the nurses, was performed through a questionnaire in 1999.

RESULTS

Four thousand sixty-eight patients were included in the audit over 5 years (1995-1999). Twelve objectives out of 15 were reached. Painful patients were less numerous, said themselves less painful, were more quickly relieved, and were satisfied by their management. The incidence of side effects was much lower than the figures of the literature.

CONCLUSION

Pain control on mobilization, maintenance of a high quality continuous formation, and development of pain control process in the other surgical departments are the new goals in progress.

How to implement an acute pain service

To implement a successful acute pain service the following factors are the most important for success: anaesthesiologist-supervised pain nurses and an ongoing educational programme for patients and all health personnel involved in the care of surgical patients. The benefits in increased patient satisfaction and improved outcome after surgery will far outweigh the costs of running an acute pain service that raises standards of pain management throughout the hospital. Optimal use of basic pharmacological analgesia will improve relief of post-operative pain for most surgical patients. More advanced approaches, such as well-tailored epidural analgesia, are needed to relieve severe dynamic pain (e.g. when coughing). This may reduce markedly risks of complications in patients at high risk of developing post-operative respiratory infections and cardiac ischaemic events. More aggressive methods for post-operative pain management need robust routines that will discover the early symptoms and signs of potentially serious complications. High preparedness must be present for swift and correct handling of the rare but potentially catastrophic complications of bleeding and infection in the spinal canal. Chronic pain is common after surgery. Better acute pain relief may reduce this distressing long-term complication of surgery. Research into the long-term effects of optimal neuraxial analgesia and drugs that dampen glutamatergic hyperphenomena (hyperalgesia/allodynia) are urgently needed to verify whether these approaches can reduce the problem of intractable chronic post-operative pain.

Postoperative pain management: why is it difficult to show that it improves outcome?

Intuitively it seems obvious that unrelieved, severe acute pain after surgery may have a number of undesirable effects [1]. Many experienced clinicians maintain that the immediate postoperative course as well as long-term outcome may be influenced by the quality of pain relief after surgery or trauma [1, 2]. However, there are conflicting data from published clinical studies concerning the beneficial effects of postoperative pain management on short-term and long-term outcome of surgery [3].

Adrenaline markedly improves thoracic epidural analgesia produced by a low-dose infusion of bupivacaine, fentanyl and adrenaline after major surgery. A randomised, double-blind, cross-over study with and without adrenaline

BACKGROUND

Basic pharmacological research indicates that there are synergistic antinociceptive effects at the spinal cord level between adrenaline, fentanyl and bupivacaine. Our clinical experience with such a mixture in a thoracic epidural infusion after major surgery confirms this. The objectives of the present study were to evaluate the effects on postoperative pain intensity, pain relief and side effects when removing adrenaline from this triple epidural mixture.

METHODS

A prospective, randomised, double-blind, cross-over study was carried out in 24 patients after major thoracic or abdominal surgery. Patients with only mild pain when coughing during a titrated thoracic epidural infusion of about 10 ml.h-1 of bupivacaine 1 mg.ml-1, fentanyl 2 micrograms.ml-1, and adrenaline 2 micrograms.ml-1 were included. On the 1st and 2nd postoperative days each patient was given a double-blind epidural infusion, at the same rate, with or without adrenaline. The effect was observed for 4 h or until pain when coughing became unacceptable in spite of a rescue analgesic procedure. Rescue analgesia consisted of up to two epidural bolus injections per hour and i.v. morphine if necessary. All patients received rectal paracetamol 1 g, every 8 h. Fentanyl serum concentrations were measured with a radioimmunoassay technique at the start and end of each study period. Main outcome measures were extent of sensory blockade and pain intensity at rest and when coughing, evaluated by a visual analogue scale, a verbal categorical rating scale, the Prince Henry Hospital pain score, and an overall quality of pain relief score.

RESULTS

The number of hypaesthetic dermatomal segments decreased (P < 0.001) and pain intensity at rest and when coughing increased (P < 0.001) when adrenaline was omitted from the triple epidural mixture. This change started within the first hour after removing adrenaline. After 3 h pain intensity when coughing had increased to unacceptable levels in spite of rescue analgesia (epidural bolus injections and i.v. morphine). Within 15-20 min after restarting the triple epidural mixture with adrenaline, pain intensity was again reduced to mild pain when coughing. Serum concentration of fentanyl doubled from 0.22 to 0.45 ng.ml-1 (P < 0.01), and there was more sedation during the period without adrenaline.

CONCLUSIONS

Adrenaline increases sensory block and improves the pain-relieving effect of a mixture of bupivacaine and fentanyl infused epidurally at a thoracic level after major thoracic or abdominal surgery. Serum fentanyl concentrations doubled and sedation increased when adrenaline was removed from the epidural infusion, indicating more rapid vascular absorption and systemic effects of fentanyl.