[Volatile anesthetics for prehospital analgesia by paramedics-An overview]. / Volatile Anästhetika zur präklinischen Analgesie durch Rettungssanitäter ­ Eine Übersicht.

Treatment of acute pain is a central task in emergency medicine. Yet, prehospital pain relief is often insufficient or delayed since the administration of potent intravenous analgesic drugs (such as opioids) is mostly limited to physicians due to legal restrictions or training deficiencies in Germany and Austria. Frequently, prehospitally operating emergency physicians have to be demanded later for anguished patients limiting disposability of physicians for patients who are in a potentially life-threatening condition. Thus, inhaled analgesics could represent an interesting alternative.A mixture of 50% nitrous oxide and 50% oxygen (N2O, Livopan®) has been available in Germany and Austria for several years; however, prehospital use of Livopan has been merely realized and only one trial has been published. In addition, methoxyflurane (Penthrop®), a volatile anesthetic from the group of the dialkyl esters (2-dichloro-1:1-difluoroethyl-methyl-ester) was approved for the treatment of moderate to severe pain following trauma in adults in many European countries in recent years and was brought onto the market in Austria in 2018. Several in-hospital trials demonstrated high effectiveness in this setting.This article discusses the effects and prehospital areas of application of both substances in the light of the existing literature. We provide a narrative overview of the current study situation and report on a recently performed prehospital application study of methoxyflurane (Penthrop®) from Austria.The need for pressurized gas cylinders for the use of N2O represents a certain limitation in prehospital use. Furthermore, in certain injuries such as of the inner ear or a pneumothorax N2O should not be used and the risk of diffusion hypoxemia has to be addressed. Users should be particularly careful and limit the use in alcohol addicts and vegans. The advances of N2O are that it is odorless, has a fast onset of action, the usability in patients over 1 month old and has stabilizing effects on the circulation. Plenty of literature regarding prehospital as well as in-hospital use of nitrous oxide in emergency, obstetric and pediatric settings show its effectiveness as a single drug as well as in combination with other analgesics, such as paracetamol or various opioids. Its long tradition in Anglo-American countries is also based on its safety and low rate of side effects.Methoxyflurane is easier to store and handle and may be slightly more effective in severe pain after trauma; however, its approval is restricted to adults, where it works significantly better with increasing age, based on the declining minimal alveolar concentration (MAC) of all inhaled anesthetics with increasing age. Furthermore, decades of use of inhaled methoxyflurane in Australia have shown the drug is effective, safe and low in side effects and has a broad spectrum of applications. The use of methoxyflurane is limited in patients with severe hepatic or renal insufficiency and the characteristic odor has been described as unpleasant by some patients. In Europe, three large in-hospital trials showed strong pain relief in trauma patients, even comparable to opioids.Overall, based on the current evidence, the use of nitrous oxide and even more of methoxyflurane may be recommended also for prehospital use by skilled paramedics.

Prehospital Pain and Analgesic Therapy in Elderly Patients with Hip Fractures.

INTRODUCTION: As a part of aging, hip fractures are becoming more common. The connection between increased pain and a poor outcome has previously been shown. Therefore, even in prehospital situations, analgesic therapy appears to be reasonable. We established a prospective study with 153 patients to evaluate the patients' pain levels during the prehospital phase of treatment and prehospital analgesic therapy. METHODS: We performed a prospective study on 153 patients the age of 60 years or older in a University hospital setting between 2010 and 2011 who suffered hip fracture. Analgesics given and the type of medical staff that was involved were documented. Pain was measured using the NRS upon initial contact of the medical staff and upon admission to our emergency department. RESULTS: Initial pain level evaluated by EMS (emergency medical service) was 6.8 (SD = 2.7). Twenty-two percent of the patients reported an NRS of 10 as the highest value following their injury. Forty-three of 153 patients (28%) received analgesics. The mean initial pain score for those 43 patients who did receive pain medication was 7.0 (SD = 2.6). However, this score dropped to a mean of 2.8 (SD = 1.4) upon hospital arrival (P < 0.001). The patients who did not receive pain medication had an initial pain score of 4.5 (SD = 1.9). Upon admission to the hospital, this score decreased to a mean of 4.0 (SD = 1.7, P = 0.092). CONCLUSION: Only a minority of patients with hip fractures received prehospital analgesia. The administration of prehospital analgesia was associated with significant pain relief.

[Comparison of the preclinical quality of analgesia of emergency physicians and paramedics based on trauma patients]. / Vergleich der präklinischen Analgesiequalität von Notarzt und Notfallsanitäter anhand traumatologischer Patienten.

BACKGROUND: Adequate prehospital pain management is a critical component of emergency medical services. With the introduction of the paramedic profession and the Paramedics Act in Germany, the basis for more extensive competencies of paramedics was established. In many emergency medical service areas it is thus possible for paramedics to perform analgesia and sedation with esketamine/midazolam according to pre-established instructions and/or standard operating procedures. This study assessed the quality of analgesia administered to trauma patients by paramedics compared to emergency medical service physicians. MATERIAL AND METHODS: The study included trauma patients who received prehospital administration of analgesia by either emergency medical service physicians or paramedics and were subsequently admitted to the central emergency department of the Saarland University Hospital. A standardized data collection form was used to collect information from the emergency service protocol and initial emergency department assessment. The evaluation employed descriptive statistical methods and a total of 207 completed records were analyzed. RESULTS: Both professional groups achieved significant pain reduction and fulfilled the criteria for effective pain management (pain reduction: emergency medical service physicians 5.5 ± 2.0/paramedic 4.4 ± 2.1, p < 0.001). Emergency medical service physicians, however, more frequently attained a higher reduction in numerical rating scale scores and administered oxygen. Notable differences were observed in the range of medications used and the dosages. CONCLUSION: This study could show that prehospital analgesia is comparable between emergency medical service physicians and paramedics in terms of effectiveness for trauma patients if the indications are correctly set, while observing pre-existing instructions. With their competencies paramedics are able to perform an effective and safe analgesic treatment within the framework of preformulated procedural instructions, which can be equal to that of an emergency medical service physician.

Randomised controlled trial of analgesia for the management of acute severe pain from traumatic injury: study protocol for the paramedic analgesia comparing ketamine and morphine in trauma (PACKMaN).

BACKGROUND: Prehospital analgesia is often required after traumatic injury, currently morphine is the strongest parenteral analgesia routinely available for use by paramedics in the United Kingdom (UK) when treating patients with severe pain. This protocol describes a multi-centre, randomised, double blinded trial comparing the clinical and cost-effectiveness of ketamine and morphine for severe pain following acute traumatic injury. METHODS: A two arm pragmatic, phase III trial working with two large NHS ambulance services, with an internal pilot. Participants will be randomised in equal numbers to either (1) morphine or (2) ketamine by IV/IO injection. We aim to recruit 446 participants over the age of 16 years old, with a self-reported pain score of 7 or above out of 10. Randomised participants will receive a maximum of 20 mg of morphine, or a maximum of 30 mg of ketamine, to manage their pain. The primary outcome will be the sum of pain intensity difference. Secondary outcomes measure the effectiveness of pain relief and overall patient experience from randomisation to arrival at hospital as well as monitoring the adverse events, resource use and cost-effectiveness outcomes. DISCUSSION: The PACKMAN study is the first UK clinical trial addressing the clinical and cost-effectiveness of ketamine and morphine in treating acute severe pain from traumatic injury treated by NHS paramedics. The findings will inform future clinical practice and provide insights into the effectiveness of ketamine as a prehospital analgesia. TRIAL REGISTRATION: ISRCTN, ISRCTN14124474. Registered 22 October 2020, https://www.isrctn.com/ISRCTN14124474.

Combat Casualties Treated With Intranasal Ketamine for Prehospital Analgesia: A Case Series.

Optimal pain management is challenging in Tactical Combat Casualty Care (TCCC), particularly in remote and austere settings. In these situations, appropriate treatment for prehospital analgesia can be limited or delayed due to the lack of intravenous access. Several guidelines suggest to implement intranasal (IN) analgesia in French Armed Forces for forward combat casualty care (Sauvetage au Combat), similar to the US TCCC. Four medical teams from the French Medical Military Service were deployed to the Middle East and Sahel from August 2017 to March 2019 and used IN ketamine for analgesia in 76 trauma patients, out of a total of 259 treated casualties. IN administration of ketamine 50mg appeared to be safe and effective, alone or in addition to other opioid analgesics. It also had minimal side effects and led to a reduction in the doses of ketamine and morphine used by the intravenous (IV) route. The French Military Medical Service supports current developments for personal devices delivering individual doses of IN ketamine. However, further studies are needed to analyze its efficacy and safety in combat zones.

Oral transmucosal fentanyl citrate analgesia in prehospital trauma care: an observational cohort study.

BACKGROUND: Pain is one of the major prehospital symptoms in trauma patients and requires prompt management. Recent studies have reported insufficient analgesia after prehospital treatment in up to 43% of trauma patients, leaving significant room for improvement. Good evidence exists for prehospital use of oral transmucosal fentanyl citrate (OTFC) in the military setting. We hypothesized that the use of OTFC for trauma patients in remote and challenging environment is feasible, efficient, safe, and might be an alternative to nasal and intravenous applications. METHODS: This observational cohort study examined 177 patients who were treated with oral transmucosal fentanyl citrate by EMS providers in three ski and bike resorts in Switzerland. All EMS providers had previously been trained in administration of the drug and handling of potential adverse events. RESULTS: OTFC caused a statistically significant and clinically relevant decrease in the level of pain by a median of 3 (IQR 2 to 4) in NRS units (P < 0.0001). Multiple linear regression analysis showed a significant absolute reduction in pain, with no differences in all age groups and between genders. No major adverse events were observed. CONCLUSIONS: Prehospital administration of OTFC is safe, easy, and efficient for extrication and transport across all age groups, gender, and types of injuries in alpine environments. Side effects were few and mild. This could provide a valuable alternative in trauma patients with severe pain, without the delay of inserting an intravenous line, especially in remote areas, where fast action and easy administration are important.

[Prehospital Pain Management: Overview and Potential Improvements]. / Präklinische Schmerztherapie: Übersicht und Verbesserungsmöglichkeiten.

Prehospital Pain Management: Overview and Potential Improvements Abstract. Pain is a frequent issue in the prehospital setting. Rapid and adequate analgesia has a positive effect on the physiological and psychological condition of patients. However, up to 43 % of patients still suffer insufficient analgesia. Several studies have identified some factors that contribute to this problem; these factors can be patient- and intervention-specific or dependent on the staff on duty. In order to improve prehospital analgesia in the future, structural and organizational changes as well as the implementation of new methods and therapies are essential.

Nasal nalbuphine analgesia in prehospital trauma managed by first-responder personnel on ski slopes in Switzerland: an observational cohort study.

BACKGROUND: Pain is one of the major symptoms complained about by patients in the prehospital setting, especially in the case of trauma. When there is mountainous topography, as in Switzerland, there may be a time delay between injury and arrival of professional rescuers, in particular on ski slopes. Administration of a safe opioid by first responders may improve overall treatment. We therefore assessed administration of nasal nalbuphine as an analgesic treatment for trauma patients in Switzerland. METHODS: This observational cohort study examined 267 patients who were treated with nasal nalbuphine by first responders in six ski resorts in Switzerland. All first responders were instructed to begin treatment by assessing the feasibility of using nalbuphine to treat pain in the patient. A treatment algorithm was developed and distributed to assure that nalbuphine was only administered following a strict protocol. Data regarding pain scores and pain reduction after administration of nalbuphine were collected on-site. Refills were handed out to the first responders with the return of each completed questionnaire. RESULTS: Nalbuphine provided effective pain relief, with the median level of pain on the numeric rating scale for pain reduced by 3 units on average, from 8 points (p < 0.001). The multivariate regression model showed that pain reduction was more pronounced in patients with higher initial pain levels. Nalbuphine was more effective in adolsecents than in patients aged 20 to 60 years (p = 0.006). No major side effects were observed. CONCLUSION: Nasal administration of nalbuphine by first responders is a presumably safe and effective noninvasive pain management strategy for acutely injured patients in the prehospital setting. This may be an alternative, especially in the case of severe pain and prolonged time between arrival of the first responders and arrival of EMS/HEMS personnel on scene.

Project for the introduction of prehospital analgesia with fentanyl and morphine administered by specially trained paramedics in a rural service area in Germany.

BACKGROUND: In patients with serious illness or trauma, reduction of severe pain is a key therapeutic goal of emergency medical service (EMS) teams. In Germany, only physicians are allowed to use opioid analgesics. In the rural EMS area studied, the mean arrival time for paramedics is 8 minutes, 23 seconds, and for the rescue physician between 10 minutes, 30 seconds and 16 minutes, 59 seconds, depending on EMS site. In cases of parallel callouts, rescue-physician arrival times may be considerably longer. OBJECTIVE: During this project, we assessed the administration of the opioid analgesics morphine and fentanyl by specially trained paramedics with regard to analgesia quality and patient safety. MATERIALS AND METHODS: During the 18-month study period, specially trained paramedics administered morphine or fentanyl to patients with severe pain if indicated and if a rescue physician was not available in time. Besides basic documentation, pain intensity (using a numeric rating scale) and oxygen saturation were measured initially and at hospital handover. RESULTS: During the 18 months, 4,285 emergency callouts were attended to by the 13 specially trained paramedics of the district (total callouts during this period 21,423). In 77 patients (1.8%), fentanyl (n=53/68.8%) or morphine (n=24/31.2%) was administered. Based on the measurements obtained with the numeric rating scale at the start of treatment (7.9) and upon hospital handover (3.3), pain reduction was 4.52 overall (41.5%, P<0.001): 4.64 with fentanyl (42.9%, P<0.001) and 4.25 with morphine (43.2%, P<0.001). None of the patients had an oxygen saturation <95% at the time of handover, and no patient developed opioid-induced respiratory depression requiring treatment. CONCLUSION: The results of this study indicate that the administration of opioid analgesics by specially trained and qualified paramedics is safe and effective.