Cryotherapeutic topical analgesics for pediatric intravenous catheter placement: ice versus vapocoolant spray

Decreasing Pain in Hospitalized Patients by Increasing Topical Anesthetic Use for Peripheral IVs

Introduction

Venous access is a common source of pain for hospitalized patients. Topical anesthetics are effective at decreasing needle pain, can improve success rate, and decrease procedure time; however, use before peripheral intravenous line (PIV) placement is inconsistent. The aim was to reduce pain experienced by hospitalized pediatric patients by increasing topical anesthetic use for PIV placement from a mean of 11% to 40% within 6 months.

Methods

The Model for Improvement was utilized. An institutional clinical pathway and PIV order panel were developed. Pre-checked orders for topical anesthetics were added to order sets. Visual aids were placed on IV carts, including reminders for anesthetics, pathway use and scripting examples. Nurses received individual feedback. Statistical process control charts were posted weekly on daily management system boards on medical-surgical floors, and data were shared at daily nursing huddles to increase awareness of performance and discuss opportunities for improvement.

Results

Topical anesthetic use for PIV placement increased from a mean of 11% to 46%. Documentation of comfort measures during PIV placement increased from a mean of 6% to 13%. The percentage of PIV placements with an order for a topical anesthetic in the electronic health record increased from a mean of 14% to 54%. PIV procedures with documentation of placement attempts increased from a mean of 47% to 70%.

Conclusions

Through systems and culture change, awareness of the importance of pain prevention for venous access procedures increased, and patient-centered care improved with greater collaboration between nurses, providers, and families for venous access planning.

Efficacy of ShotBlocker device versus vapocoolant spray for spinal needle pain relief during spinal anaesthesia in elective caesarean section - A randomised controlled trial

Background and Aims

Apprehension of pain due to a spinal needle is often a cause of anxiety and refusal. ShotBlocker provides non-painful physical stimulation, inhibiting pain perception. The vapocoolant spray contains ethyl chloride vapours, rapidly raising the skin temperature and hampering the transmission of noxious stimuli. The present study compared the effectiveness of the ShotBlocker device and the vapocoolant spray in reducing spinal needle-associated pain in primigravida women undergoing elective lower-segment caesarean section (LSCS).

Methods

We enroled 144 primigravida women undergoing elective LSCS and were randomised to Group SB (the ShotBlocker device was firmly pressed over the skin, and the spinal needle was inserted through its slit), Group V (the vapocoolant spray was applied at the puncture site before spinal needle insertion), and Group C (received local infiltration before spinal anaesthesia (SA)). The groups were compared for needle-associated pain and patient satisfaction using a 10-point visual analogue scale (VAS) and a 3-point Likert scale.

Results

The mean (standard deviation) [95% confidence interval (CI)] VAS scores of Group SB 3.85 (0.74) [3.64, 4.07] and Group V 3.04 (0.74) [2.83, 3.26] were significantly lower than that of Group C 5.19 (0.92) [3.28, 3.62]). On the Likert scale, the maximum number of patients in the vapocoolant group (64.6%) responded satisfactorily, while in the control group, the majority (62.5%) of participants responded dissatisfied (P < 0.001).

Conclusion

Both the ShotBlocker and vapocoolant spray reduce needle puncture-associated pain before SA in primigravida patients undergoing elective LSCS. However, the vapocoolant spray is more beneficial in reducing spinal needle-associated pain than the ShotBlocker device.

The Impact of Cold Spray and Ice Application During Intravenous Access on Pain and Fear in Children Aged 7-15 Years in the Pediatric Emergency Unit: A Randomized Controlled Trial

INTRODUCTION

Many strategies have been developed to prevent procedural pain in pediatric emergency units, where nurses play a vital role in ensuring patient comfort. Easy-to-use and inexpensive nonpharmacologic analgesic methods are important in emergency units. This study was conducted to determine the effect of cold spray and ice applied during venipuncture on the level of fear and pain in children aged 7 to 15 years.

METHODS

This was a randomized controlled experimental study of 96 children between the ages of 7 and 15 years (cold spray group, ice group, and control group) who were scheduled to have venous access in the pediatric emergency clinic and met the sampling criteria.

RESULTS

Evaluations of the children, parents, and observers in the groups found a statistically significant difference between the pain and fear scores after the intervention compared with the preintervention (P < .001). The pain and fear scores of the children in the control group were higher than the scores of those in the spray and ice groups (P < .001); the pain and fear scores of the children in the spray group were lower than the scores of the children in the ice group and statistically significant (P < .001).

DISCUSSION

In conclusion, cold spray applied during intravenous access in children aged 7 to 15 effectively reduces pain and fear and should be used in the emergency unit.

A Comparison of the Effects of Acupressure and Music on Venipuncture Pain Intensity in Children: A Randomized Controlled Clinical Trial

Pain from injections is common in children of all ages, and more than 90% of hospitalized children experience invasive and painful procedures such as venipuncture. In light of the complications associated with pain relief medications, nonpharmacological and complementary medicine approaches have gained attention. This study aims to compare the effects of acupressure and music on venipuncture pain intensity in children. This randomized controlled clinical trial involved 180 children aged 3-6 years who sought treatment at the Children's Medical Center Hospital Emergency Department at Tehran University of Medical Sciences, Iran. The children were randomly assigned to one of three groups: acupressure, music, or control. The interventions were given within 5 minutes, starting 3 minutes before the venipuncture and continuing until completion. The interventions included playing music through headphones and applying acupressure to the Hugo point. Venipuncture was carried out under identical conditions using an Angiocath 24G needle. Pain intensity was assessed using the Oucher scale. Data were analyzed using SPSS 24, employing the Kruskal-Wallis, chi-square, and Bonferroni pairwise comparison tests, with a significance level of 0.05. The mean pain intensity was 3.32 ± 1.44 in the music group, 4.82 ± 1.51 in the acupressure group, and 8.32 ± 1.10 in the control group. Pain intensity significantly differed among the three groups (p < 0.001). Specifically, pain intensity was lower in the music group compared to both the acupressure (p < 0.001) and control (p < 0.001) groups. Furthermore, pain intensity was lower in the acupressure group than in the control group (p < 0.001). Based on the results, music and acupressure methods effectively reduce pain intensity during venipuncture in children. Considering that music demonstrated a more pronounced effect in alleviating venipuncture pain than acupressure, the recommendation is to utilize music as a method of pain management during venipuncture in children. Iranian Registry of Clinical Trials, Trial No. IRCT20120109008665N15, was registered on 6 December 2021.

Effect of coolant spray on rib fracture pain of geriatric blunt thoracic trauma patients: a randomized controlled trial

OBJECTIVE

This study aimed to evaluate the effectiveness of cryotherapy in elderly patients with rib fractures due to blunt thoracic trauma.

METHODS

In this prospective randomized controlled study, geriatric patients were assigned to groups to receive either coolant spray (n=51) or placebo spray (n=50). The visual analog scale scores of all patients were recorded before starting spray application (V0), as well as at 10th (V1), 20th (V2), 30th (V3), 60th (V4), 120th (V5), and 360th (V6) minute. The mean decreases in the visual analog scale scores were calculated.

RESULTS

The differences between V0 and V1, V0 and V2, V0 and V3, and V0 and V4 mean visual analog scale scores measured in the coolant spray group were found to be significantly higher (p<0.001). In V1, V2, V3, and V4 measurements, the incidence of "clinical effectiveness" in the coolant spray group was significantly higher than in the placebo group (p=0.001).

CONCLUSIONS

Coolant spray therapy can be used as a component of multimodal therapy to provide adequate analgesia due to rib fractures in geriatric patients.

Efficacy and safety of vapocoolant spray for vascular puncture in children and adults: A systematic review and meta-analysis

OBJECTIVE

The aim was to evaluate the effectiveness and safety of the vapocoolants for vascular puncture in children and adults.

METHOD

The search was carried out in PubMed, Web of Science, Embase and The Cochrane Library, from inception to March 2022. Randomized controlled trials comparing vapocoolants to control conditions for participants received intravenous cannulation or arterial puncture were included. Two reviewers independently performed selection of studies, data extraction, and assessment of risk of bias. The analysis was performed using fixed or random-effects model with mean differences or standardized mean difference and risk ratios.

RESULTS

A total of 25 studies involving 3143 participants were included. Compared with control conditions, vapocoolants may not decrease the pain of patients with arterial puncture (SMD = -0.36, 95% CI = -0.92 to -0.19, P = 0.20), but may more effectively relieve pain for adults received vein puncture (SMD = -0.65, 95% CI = -0.85 to -0.45, P < 0.00001). The application of vapocoolant increased the procedural difficulty of medical personnel (RR = 2.49, 95% CI = 1.62 to 3.84, P<0.000 1) and participants were more willing to use the spray in the future (RR = 1.88, 95% CI = 1.34 to 2.64, P = 0.0002). There was no significant difference for the first attempt success rate of the procedure and the occurrence of adverse events.

CONCLUSIONS

Vapocoolant spray may relieve pain in adults received vein puncture and cannot cause severe side effects, but is ineffective in children. It also had no effect on patients with arterial puncture. In addition, the application of spray increases procedural difficulties for medical professionals, but does not decrease first attempt success rate, and many patients would like to use the spray again for pain relief in the future. Thus, more rigorous and large-scale studies are needed to determine its effectiveness in vascular access.

Low Relevancy of Outcome Measurements of Studies of Pediatric Pain in the Emergency Department

Many children visiting the emergency department (ED) experience pain. Several pharmacological and nonpharmacological interventions are used for pain control. Little is known about the outcome measurements in studies about pain in children in the ED.Furthermore, it is not known if complete pain relief was reached.

METHODS

PubMed, the Cochrane Database of Systematic Reviews, and EMBASE were searched for articles on clinical trials for pain relief in children in the ED. Inclusion criteria contained predictable and identifiable pain such as after trauma or during procedures.

RESULTS

Of 620 articles found, 45 fulfilled the criteria. Twenty studies (44%) used pharmacological interventions, and 25 (56%) studied nonpharmacological interventions. In 24 studies (53%), a statistically significant pain reduction was described in the intervention group. In 21 studies (47%), a clinically relevant reduction in pain was found. In only 1 study, the reported aim was to reach absence of pain.

CONCLUSION

Half of the interventions decreased pain in children in the ED. However, most studies did not aim at complete pain relief. Even in intervention groups with statistically significant decrease in pain, children still had pain. Children in the ED deserve better.Complete pain relief should be the goal of any intervention for these children in the ED.Studies on pain treatment in the ED should have complete pain relief as primary end point.

Comparison of the Effect of EMLA™ Cream and the Valsalva Maneuver on Pain Severity during Vascular Needle Insertion in Hemodialysis Patients: A Controlled, Randomized, Clinical Trial

Background

Pain due to vascular needle insertion has been reported in 40-60% of hemodialysis (HD) patients. Evidence suggests that there is typically no single method for relieving the pain of inserting vascular needles in HD patients. This study aimed to compare the effectiveness of EMLA cream and Valsalva maneuver (VM) on pain severity during vascular needle insertion in HD patients.

Methods

This randomized, controlled, clinical trial was conducted on 90 patients undergoing hemodialysis in the hemodialysis unit of Kowsar Hospital, affiliated with Semnan University of Medical Sciences, in Semnan, Iran. Patients were selected via convenience sampling and were randomly assigned to one of the three groups (EMLA, VM, and control groups). For the patients in the EMLA group, 2.5 g of EMLA cream was applied 60 minutes before the start of dialysis. For patients in the VM group, a maneuver was performed for 16-20 seconds before the needle was inserted. Patients in the control group received only routine care without any additional interventions. The pain severity in the three groups was measured using the visual analog scale (VAS) two minutes after vascular needle insertion.

Results

The results showed that the mean pain severity during cannulation was 2.06 ± 2.19 in the EMLA group, 3.2 ± 30.42 in the VM group, and 6.20 ± 1.49 in the control group, suggesting a significant difference between the groups (P < 0.001). Pairwise comparison of the mean pain severity showed that it differed significantly in the EMLA and VM groups from the control group (P < 0.001), but no significant difference was found between the EMLA and VM groups (P=0.067).

Conclusion

According to the results, EMLA cream was as effective as VM in reducing the pain severity caused by arteriovenous fistula (AVF) cannulation. Therefore, the use of EMLA cream and VM is recommended for reducing the severity of AVF cannulation pain. Trial Registration. Iranian Registry of Clinical Trials, Trial No : IRCT20120109008665N12, registered on 3 June 2020.

Acute Pancreatitis in Children

Acute pancreatitis has become a common general pediatric condition with an increasing incidence over the past 2 decades. It presents with nonspecific complaints of abdominal pain, vomiting, and nausea. Therefore, it is crucial to have it on the differential diagnosis, as it requires prompt treatment and has the potential to become life-threatening. Although pancreatic rest, antiemetics, analgesia, and hydration remain the mainstay of treatment, a new perspective on fluid management, early enteral nutrition, and opioid use has evolved. This review identifies gaps in management awareness and provides understanding on long-term implications of acute and recurrent pancreatitis. This article also reviews the epidemiology, diagnostic criteria, imaging and procedural modalities, common causes, management, and complications of acute pancreatitis and is geared toward the general pediatric hospitalist. [Pediatr Ann. 2021;50(8):e330-e335.].

Topical Vapocoolant-Associated Vaso-occlusive Event in a 10-year-old with Sickle Cell Disease

Vapocoolant sprays are convenient forms of cold temperature analgesia. These sprays may not be suitable for all patients with particular concern for patients with sickle cell disease. To prevent any further cases from occurring, we propose adding a more specific cautionary statement to the manufacturer guidelines. We also hope that medical personnel can help patients with sickle cell avoid topical and environmental cold temperature triggers for sickle vaso-occlusive pain and reduce the suffering in this rare disease.

Antinociceptive effect of vapocoolant medium stream spray on hotplate latency in rat pups

BACKGROUND

Heel sticks account for most blood tests performed in neonates without analgesia because topical local anesthetics are ineffective on heel glabrous skin. We investigated the antinociceptive effect of an alternative topical analgesic, a vapocoolant spray, on hind paw glabrous skin of rat pups. The spray was applied by two methods: method 1 for 4 s at a distance of 8 cm and method 2 for 10 s at a distance of 18 cm.

METHODS

The rat pups were randomized to either method 1 (n = 32) or method 2 (n = 31). Vapocoolant spray was applied to one hind paw randomly, and saline spray was applied to the contralateral paw. The paws were exposed to a hotplate test to measure withdrawal latency time before and 30 s after the spray applications. Additionally, rat pups were tested for tissue toxicity in method 1 (n = 20) and method 2 (n = 20) after application of the vapocoolant spray before heel sticks three times a day for two consecutive days. Analyses of spray and method effects on hotplate withdrawal latency time were determined by nonparametric Wilcoxon tests to assess paired difference between vapocoolant spray and saline spray and to compare difference in medians between the two methods.

RESULTS

Method 1 and method 2 vapocoolant spray applications significantly prolonged the withdrawal latency time compared with saline, a median difference of 0.6 s (IQR 0.1-1.2) for method 1 and 9.5 s (IQR 5.5-10.7) for method 2 (a 15-fold longer latency time with method 2). Method-2 produced significantly longer withdrawal latency time than method 1 with a difference in median time of 8.9 s (CI: 95% 7.3-10.4 s, P < .0001). No histopathological changes were detected.

CONCLUSIONS

Compared with method- 1, the vapocoolant spray in method 2 produced significantly longer withdrawal latency time that is clinically applicable to collecting blood samples after a heel stick.

Attitudes and Opinions of Adolescent Females Regarding 2 Methods of Bladder Filling for Transabdominal Ultrasound: A Q-Sort Study

OBJECTIVES

Adolescent female patients who are not sexually active and who present to a pediatric emergency department with abdominal pain require a full bladder prior to transabdominal ultrasound. Procedures to fill the bladder are largely institution or provider dependent. We examined adolescent females' attitudes and opinions toward 2 common methods of bladder filling, intravenous fluid administration and transurethral Foley catheter placement, by means of a Q-sort study.

METHODS

Two convenience samples of adolescent female patients in the pediatric emergency department at an academic children's hospital participated in the study. In part 1, subjects underwent a semistructured interview to elicit their opinions regarding 2 methods of bladder filling: intravenous fluid or transurethral catheter. The summation of subject statements was then narrowed down to a final Q set of 25 statements. In part 2, a second sample of subjects independently arranged this Q set according to their own agreement or disagreement with each statement. Principal components analysis was conducted to examine factors or collections of statements representing a shared viewpoint and to describe commonalities.

RESULTS

Part 1 was completed with 9 subjects, and part 2 with 26 subjects. Factors revealed from the Q-sort data included acceptance of tests deemed medically necessary, desire for parental involvement, and a wish to minimize discomfort. Most adolescents aligned with 1 of these 3 factors.

CONCLUSIONS

Adolescent female patients varied in their attitudes and opinions regarding intravenous catheter hydration and Foley catheter placement for transabdominal ultrasound. Knowledge of adolescent viewpoints may help better inform practitioner-patient communication for this procedure.

Nonexperimental Xenobiotics: Unintended Consequences of Intentionally Administered Substances in Terrestrial Animal Models

Review of the use of nonexperimental xenobiotics in terrestrial animal models and the potential unintended consequences of these compounds, including drug-related side effects and adverse reactions.

Ice therapy: cool, current and complicated

This is the fourth Capsule review article provided by the WSAVA Global Pain Council and which discusses the use of ice or cold therapy as a non-pharmacologic modality for pain control in small animal practice. The physiological effects of cold therapy on tissues, receptors and ion channels are discussed; as well as indications, recommendations for, and limitations of use.

Effects of Cold Compress on the Heguous Point of Meridian Large Intestine on Pain before Giving Immunization in Infants

Introduction: In basic immunizations received by infants 90% are given by injection. The immunization given by injection is a source of pain which can cause anxiety and trauma not only in infants but also for their families. Thus, it is necessary to deal with the pain with appropriate management. One non-pharmacological therapy that can be used to reduce pain is by providing cold compresses. The aim of this study was to determine the effects of cold compress on the heguous point of meridian large intestine on pain before giving immunization.Methods: This study used the quasi experimental method of posttest design with control group. This study used the instruments of Face, Legs, Activity, Cry and Consolability (FLACC) Behavioral Pain Assessment Scale to measure the pain. The sample was 42 people taken by consecutive sampling. The research data were analyzed by using the Mann Whitney test. The results obtained a p value equal to 0.023 (<0.05).Results: This indicates that there were significant differences in pain scores between the two groups, meaning that there is a significant effect of giving cold compresses to the pain score before giving immunization.Conclusion: This result explains that cold compresses carried out at the heguous point can be used as an alternative for management for non-pharmacological pain in infants during immunization.

A mini review on the common methods of pain reduction before filler and botulinum toxin injection

BACKGROUND

As the desire for beauty and youthful appearance has increased in recent years, cosmetic injections are getting more attention. However, patients discomfort during these injections is a challenging issue.

AIM

This review explores common approaches to reduce pain and discomfort during cosmetic injections through the available literature.

METHODS

The eligible studies through searching in PubMed have been entered to evaluate the common methods of pain reduction for cosmetic injections.

RESULTS

According to reviewed studies, vibration, local anesthesia, and vapocoolant anesthesia are common methods applied in order to reduce pain and discomfort in patients. All of these methods are able to reduce pain through their affects on neuron fibers.

CONCLUSION

It seems that all common approaches can result in some amount of pain reduction. Using a combination of these methods during injections, practitioners can successfully reduce the pain of injection.

Comparison between Vapocoolant Spray and Eutectic Mixture of Local Anesthetics Cream in Reducing Pain during Spinal Injections

Background

Eutectic mixture of local anesthetics (EMLA) cream is often used for local anesthesia during spinal injections. However, this agent has delayed onset of action while vapocoolant spray serves more advantages. The vapocoolant spray containing ethyl chloride has fast onset and is safe, low cost, and widely available. This study aimed at comparing the effectiveness of vapocoolant spray and EMLA cream in reducing pain for spinal injections.

Methods

This was an experimental study on 94 subjects with 47 subjects treated with EMLA cream and 47 subjects treated with vapocoolant spray. The effectiveness of anesthesia was assessed by using Numeric Pain Rating Scale (NPRS) and patient movement during the surgery.

Results

This study found that the pain scale was NPRS 0 (0–3) for the EMLA group and NPRS 0 (0–4) for the vapocoolant spray group. There was no significant difference between two groups for pain scale according to the Mann–Whitney U test. For patient movement, the movement was reported only in one (2.1%) patient in the EMLA group and one (2.1%) patient in the vapocoolant spray group. Based on Fisher's test, there was no significant difference between the two groups for patient movement.

Conclusions

Both EMLA cream and vapocoolant spray were equally effective in reducing pain during spinal injection. There was no difference in degree of pain reduction and patient movement between the EMLA cream group and the vapocoolant spray group during spinal injection.

[The Effect of Pain Relieving Intervention During Infiltration among Gamma Knife Surgery Patients for Stereotactic Frame Fixation]

PURPOSE

This study aimed to compare the effects of three interventions on pain, blood pressure, and pulse rate during infiltration anesthesia in patients about to undergo gamma knife surgeries.

METHODS

The three interventions employed in a university-affiliated Hospital in J City, South Korea were as follows: EMLA cream plus Vapocoolant spray (Vapocoolant, n=30), EMLA cream plus 10.0% Lidocaine spray (Lidocaine, n=30), and EMLA cream only (EMLA, n=30). The equivalent control-group pre test - post test study design was used. Pain was assessed subjectively using the numeric rating scale (NRS) and objectively using a Galvanic Skin Response (GSR) tester. NRS scores were assessed after infiltration anesthesia and the GSR was assessed during infiltration anesthesia. Blood pressure and pulse rate were assessed twice: before and after infiltration anesthesia. Data were collected between August 3, 2016 and March 24, 2017.

RESULTS

NRS scores after infiltration anesthesia and the GSR during infiltration anesthesia were significantly lower in the Vapocoolant group than in the Lidocaine and EMLA groups (F=13.56, p<.001 and F=14.43, p<.001, respectively). The increase in systolic blood pressure (F=4.77, p=.011) and in pulse rates (F=4.78, p=.011) before and after infiltration anesthesia were significantly smaller in the Vapocoolant group than in the Lidocaine and EMLA groups; however, no significant differences were observed in diastolic blood pressures (F=1.51, p=.227).

CONCLUSION

EMLA cream plus Vapocoolant spray was the most effective intervention to relieve pain and to lower increase in systolic blood pressure and pulse rate caused by infiltration anesthesia for stereotactic frame fixation. Thus, application of Vapocoolant spray in addition to EMLA cream is highly recommended as a nursing intervention for patients undergoing gamma knife surgeries.

Vapocoolant Anesthesia for Cosmetic Facial Rejuvenation Injections: A Randomized, Prospective, Split-Face Trial

Background: Minimally invasive cosmetic procedures are the most commonly performed aesthetic techniques by plastic surgeons. Patients are interested in a pain-free experience. Surgeons desire patient satisfaction and time-efficient utilization of office staff and resources. Clinical evidence exists for use of vapocoolant technology to reduce pain associated with intravenous cannulation in the pediatric population and in hemodialysis patients. Applying vapocoolant technology to facial rejuvenation is a novel approach to decrease pain associated with neurotoxin or filler injection. Methods: A randomized, prospective study was conducted, testing 15 subjects receiving filler injections and another 15 patients receiving neurotoxin injections using a split-face model. The vapocoolant spray used was composed of a 95:5 ratio of 1,1,1,3,3-pentafluoropropane and 1,1,1,2-tetrafluoroethane. Within each group, individual patients randomly received injection (filler or neurotoxin) alone versus injection (filler or neurotoxin) plus vapocoolant on an equivalent half of his or her face. An independent examiner recorded from each patient on a scale of 1 to 10 perceived pain for injection alone versus injection plus vapocoolant spray. Results were calculated as a percentage change of pain scores experienced after injection for each person between the control (nonvapocoolant) and treatment (vapocoolant) sides of the face. Results: Vapocoolant spray at the time of cosmetic facial injections leads to a 59% decrease in perceived pain score with neurotoxin injections (range, 0%-100% change) and 64% decrease in perceived pain score with filler injections (range, 0%-100% change). These results were statistically significant with P < .05. Conclusion: Vapocoolant spray reduces pain associated with facial rejuvenation procedures.

Managing Pediatric Pain in the Emergency Department

Far more attention is now given to pain management in children in the emergency department (ED). When a child arrives, pain must be recognized and evaluated using a pain scale that is appropriate to the child's development and regularly assessed to determine whether the pain intervention was effective. At triage, both analgesics and non-pharmacological strategies, such as distraction, immobilization, and dressing should be started. For mild pain, oral ibuprofen can be administered if the child has not received it at home, whereas ibuprofen and paracetamol are suitable for moderate pain. For patients who still require pain relief, oral opioids could be considered; however, many EDs have now replaced this with intranasal fentanyl, which allows faster onset of pain relief and can be administered on arrival pending either intravenous access or definitive care. Intravenous opioids are often required for severe pain, and paracetamol or ibuprofen can still be considered for their likely opioid-sparing effects. Specific treatment should be used for patients with migraine. In children requiring intravenous access or venipuncture, non-pharmacological and pharmacological strategies to decrease pain and anxiety associated with needle punctures are mandatory. These strategies can also be used for laceration repairs and other painful procedures. Despite the gaps in knowledge, pain should be treated with the most up-to-date evidence in children seen in EDs.

An Evidence-Based Approach to Minimizing Acute Procedural Pain in the Emergency Department and Beyond

BACKGROUND

Painful procedures are common in the ED setting and beyond. Although these procedures are often essential to patient management, they can also be distressing for children, parents, and health providers. As such, it is imperative that effective pain and anxiety-minimizing strategies be used consistently in all settings where painful procedures take place for children.

OBJECTIVES

This review article aims to provide a summary of several strategies, which are supported by definitive and systematically reviewed evidence, that can be implemented alone or in combination to reduce procedural pain and anxiety for children in the ED and beyond.

RESULTS

For neonates, breastfeeding, nonnutritive sucking, swaddling, and sucrose administration have all been shown to decrease pain during painful interventions. For neonates, venipuncture is much less painful than heel lance for blood draws. For infants, there is some support for sucrose use. For infants and older children, there is strong evidence for distraction techniques. In addition, the use of fast-acting topical anesthetic creams as an alternative or adjunct to infiltrating anesthetic before laceration repair or vascular access/venipuncture is recommended. Further, buffering of lidocaine can decrease pain during injection. Lastly, if a laceration is amenable to the use of tissue adhesive, this should be preferentially used.

CONCLUSIONS

In summary, there currently remains a knowledge-to-practice gap in the treatment of children's procedure-related pain. This article has identified multiple age-specific methods to improve the treatment of procedural pain. These simple interventions can improve the care provided to ill and injured children.

Subcutaneous and Intramuscular Hemodynamics and Oxygenation After Cold-Spray Application as Monitored by Near-Infrared Spectroscopy

CONTEXT

Vapocoolant spray, commonly known as cold spray (CS), is a cryotherapy modality used in sports medicine, athletic training, and rehabilitation settings. Proposed physiologic effects of cryotherapy modalities include reductions in tissue blood flow, oxygenation, and cell metabolism in addition to attenuation of pain perception attributed to reduced superficial nerve conduction velocity.

OBJECTIVE

To examine the effects of CS on subcutaneous and intramuscular blood flow and oxygenation on the thigh muscle using near-infrared spectroscopy, an optical method to monitor changes in tissue oxygenated (O2Hb), deoxygenated (HHb), and total (tHb) hemoglobin.

DESIGN

Cross-sectional study.

SETTING

Muscle Biophysics Laboratory.

PATIENTS OR OTHER PARTICIPANTS

Participants were 13 healthy adults (8 men, 5 women; age = 37.4 ± 6 years, body mass index = 27.4 ± 2.6, adipose tissue thickness = 7.2 ± 1.8 mm).

INTERVENTION(S)

Conventional CS was applied to the vastus medialis muscles.

MAIN OUTCOME MEASURE(S)

Changes in chromophore concentrations of O2Hb, HHb, and tHb at superficial and deep layers were monitored for 5 minutes using a 2-channel near-infrared spectroscopy.

RESULTS

Thirty seconds after CS application, we observed a decrease from baseline in O2Hb and tHb only in the superficial layer that was maintained for 3 minutes.

CONCLUSIONS

Application of CS induced a transient change in blood flow and oxygenation of the superficial tissues with no change in deeper tissues over the healthy vastus medialis muscle. The limited physiologic effect of CS on the superficial hemodynamics and oxygenation of limb muscles may limit the therapeutic benefit of this cryotherapy modality to a temporary analgesic effect, a hypothesis that warrants a clinical trial on traumatized muscles.

Adverse effects of vapocoolant and topical anesthesia for tail biopsy of preweanling mice

Tail biopsy of laboratory mice for genotyping purposes has been studied extensively to develop refinements for this common procedure. Our prior work assessed tail vertebral development in different mouse strains (age, 3 to 42 d) and analyzed behavior and activity in mice (age, 21 to 45 d) biopsied under isoflurane anesthesia. To assess the effects of biopsy on preweanling mice, we here evaluated BALB/cAnNCrl mice (n = 80; age, 18 to 21 d) that received topical vapocoolant (ethyl chloride), topical anesthetic (Cetacaine), or isoflurane anesthesia before undergoing a 5-mm or sham biopsy. Control mice did not receive any anesthetic intervention. Regardless of the anesthetic used, acute observation scores indicative of distress were increased at 10 min after biopsy, and locomotor activity was decreased, in biopsied compared with control mice. Acute observation scores at 10 min after biopsy were higher in mice that received ethyl chloride compared with isoflurane or no anesthesia. Microscopic analysis revealed that inflammatory changes in the distal tail remained elevated until 7 d after biopsy and were higher in tails exposed to ethyl chloride. Our findings indicate that vapocoolant, topical anesthesia, and inhaled isoflurane do not enhance the wellbeing of preweanling mice undergoing tail biopsy. Due to the lack of appreciable benefits and the presence of notable adverse effects, using vapocoolants or Cetacaine for this tail biopsy procedure in laboratory mice is unadvisable and we encourage the removal of these agents from institutional tail biopsy guidelines.

A systematic review of vapocoolants for reducing pain from venipuncture and venous cannulation in children and adults

BACKGROUND

Studies of vapocoolants for pain reduction from venipuncture have demonstrated conflicting results.

OBJECTIVE

Our aim was to systematically review the literature regarding the analgesic effectiveness of vapocoolants in children and adults.

METHODS

We searched MEDLINE, EMBASE, CINAHL (Cumulative Index to Nursing and Allied Health Literature), and Cochrane Central Register of Trials using key words: vapocoolant, pain, venipuncture, and cannulation. We included randomized or quasi-randomized studies comparing vapocoolants to placebo or no treatment. Two authors reviewed titles and abstracts and extracted data. Quality was assessed by consensus using the Cochrane risk of bias tool. The primary outcome was self-reported pain using a 100-mm visual analog scale, a 0- to 10-point numerical scale, or observational scale for preverbal children. Data were pooled using a random effects model.

RESULTS

Twelve studies including 1266 patients (509 children, 757 adults) were identified. No significant pain reduction was found in children receiving vapocoolants vs. placebo or no treatment (mean difference -10 mm; 95% confidence interval [CI] -26 to 6). In adults, less pain was reported when vapocoolants were compared with no treatment: -10 mm on a 100-mm scale (95% CI -17 to -4); but not when compared to placebo (-12 mm; 95% CI -26 to 2). Pain from application of vapocoolants was greater than placebo (8 mm; 95% CI 4 to 2).

CONCLUSIONS

Vapocoolants were ineffective in children and adults when compared to placebo, and effective in adults only when compared to no treatment. The magnitude of effect was low and was offset by increased pain from application. They cannot be recommended for routine use in children or adults.