APS401 - Methoxyflurane and its Role in Ambulance Services - Medical Science Assignment Help

Assignment Task

Methoxyflurane and its role in ambulance services
Introduction
Methoxyflurane is a medication used in the pre-hospital setting predominantly to treat pain in acute trauma (Jephcott, Grummet, Nguyen & Spruyt, 2018). The drug has high lipid solubility, which leads to a prolonged pharmacokinetic system, resulting in ineffectiveness in the clinical settings (Jephcott, Grummet, Nguyen & Spruyt, 2018). The recent review shows that drug has effective action in pain control. The literature review illustrates its effectiveness in pain management.

Indications

1. For emergency relief of pain in patients with trauma and associated pain
2. for the relief of pain in patients who require analgesia for surgical procedures
Contraindications Use as an anaesthetic agent, Renal Impairment, renal failure, cardiovascular instability, Respiratory depression, Head injury/loss of consciousness, a history of possible adverse reaction in either patient or relatives, Malignant hyperthermia

Mechanism of action The exact mechanism in which inhaled methoxyflurane produces loss of perception of sensation is unknown. The Meyer-Overton theory suggests that the action site may be the lipid matrix of neuronal membranes or other lipophilic sites.
Dose In 1.5mL or 3mL vials. Up to 6mL can be used in 24 hours. The lowest dosage of methoxyflurane should be used to provide analgesia.
Route of administration Self-administered under the care of a trained person via an inhaling device.
Adverse effects Dry mouth, nausea, vomiting, dizziness, dysarthria, headache
MIMS Australia (2020), National Center for Biotechnology Information (2021).

Methods
Database used for research Keywords Results
Drug go online Methoxyflurane, neuromuscular agent 1
Access data FDA Pain relief, neuromuscular agent and renal failure 16
Drug info Pain relief, renal failure and kidney failure 18
Search drug database Pain treatment 2

Results
Study and its results Article convey the message
The studies indicate the effectiveness of the drug by calculating pain scores. Clinical trials gov. (2019)
In this clinical study, the population involves children groups, with the primary outcome being a change in pain intensity at 15 minutes after commencement. Hartshorn, S. Barrett, M. J. Lyttle, M. D. Yee, S. A. Irvine, A. T. & in collaboration with Paediatric Emergency Research in the UK and Ireland (PERUKI) (2019).
In these studies, the population group studied is adults, in which the pain score is calculated at different time intervals. In these study the adult group is taken for the study that belongs to the age group 18-100 with severe and moderate pain and were treated in paramedic the drug administrated is 2.5mg to 5mg for every two minutes. Yeung, S. S. & Adcock, L. (2018).
From the above studies it is clearly indicated that the drug show pain reduction but for limited time period and requires timely administration(Clinical trials gov, 2019). The slow kinetics of the drug and its impact on organs leads to adverse effects, the study shows that 15ppm exposure for 8h ( among 40 patients) leads to the problems and results in nephrotoxicity (Ruff, Kerr, Kerr, Zalcberg & Stevens, 2018). Another clinical study shows the impact of the drug on children; it indicates that the drug shows its effect after 30 minutes that lead to a thirty percent reduction in visual analog scoring (VAS) compared to the baseline score (Jephcott, Grummet, Nguyen & Spruyt, 2018). The medication assessment has shown that it is beneficial in the first line of treatment and controls the rate of pain in severe injuries. Another clinical study shows the drug's effect in a pre-clinical setting in the adult group that leads to the control of pain and promotes occupational safety. These studies indicate that inhaled methoxyflurane generally provides well-tolerated relief for short-term acute pain, particularly in trauma patients. The results of the above studies leads to the outcomes the administration of drug is safe in primary settings but not effective in pain control as it requires time to get absorbed in system and after that it leads to the 30 percent reduction out of 100 that is very less(Yeung & Adcock, 2018).

Discussion
Methoxyflurane is usually used in emergency services to control pain and provide relief to the patient. It is an inhalational anesthetic that binds to the neuron and leads to the control of signalling that further leads to the numbness of the affected area. The pharmacokinetic action of the drug is very slow that leads to long-term exposure (Porter, Dayan, Dickerson & Middleton, 2018). As the biodegradation of the drug starts in the body, it leads to the catabolic metabolism in the liver and kidney. The nephrotoxicity of the drug depends on how long it is present in the system. The dissociation of the drug into fluoride and other toxic elements leads to the accumulation in the cells that changes the physiological properties of the cell (Ruff, Kerr, Kerr, Zalcberg & Stevens,2018). Long-term exposure in the system leads to the formation of the crystals in the liver. Then, the formation of Floride that serves as toxic elements in the liver and in the kidney that become the reason for renal failure. There are several side effects associated with the drug that involves the development of stress, depression, and anxiety due to its binding to the nerve and brain that leads to the control of signals. The best administration involves a regulated amount with tracking. It is recommended that medication needs not be provided with antibiotics as it may lead to the inference with the activities and leads to the increased toxicity. this literature review illustrates the medication and its effect on different populations and management of pain.

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