scholarly journals Effects of Endotracheal Administration of Epinephrine in Cardiac Arrest of Adult and Pediatric Swine

2019 ◽  
Vol 3 (2) ◽  
pp. p34
Author(s):  
Steven Kertes ◽  
Valentina Fillman ◽  
Brandon Krawczyk ◽  
Logan Hirsch ◽  
Allison Martin ◽  
...  
Keyword(s):  
Cardiac Arrest ◽  
Area Under The Curve ◽  
Spontaneous Circulation ◽  
Average Weight ◽  
Male Adult ◽  
Epinephrine Administration ◽  
Blood Samples ◽  
Return Of Spontaneous Circulation ◽  
Significant Difference ◽  
Adults And Children

BACKGROUND: Few studies have investigated the effects of hypovolemia on area under the curve (AUC) and the return of spontaneous circulation (ROSC) comparing adults and children in cardiac arrest.AIMS: To compare the epinephrine endotracheal (ET) administration relative to AUC, rate, time to, and odds of achieving ROSC between hypovolemic adult and pediatric cardiac arrest models.METHODS: This was an experimental study using male Adult ET and Pediatric ET swine. Pediatric ET pigs (N=7) weighed 20-30 kg representing the average weight for a child between 5 and 6 years of age. Adult ET pigs (N=7) weighed 60 to 80 kg. All were exsanguinated 35% of their blood volume. Swine were put into arrest for 2 minutes. Cardiopulmonary resuscitation (CPR) was initiated for 2 minutes; epinephrine was then administered. Blood samples were collected over 5 minutes. RESULTS: No significant difference occurred in AUC between the groups (p > 0.05). The Pediatric ET group had higher rates of ROSC and a shorter time to ROSC (p < 0.05). Pediatric ET group had a 15 times greater odds of achieving ROSC compared to the Adult ET group. CONCLUSION: Based on the results of this study, we recommend epinephrine administration via ET within the pediatric arrest model, but not for the adult.

scholarly journals The effects of cardiac arrest recognition by dispatcher on Smart Advanced Life Support

2019 ◽  
Vol 27 (5) ◽  
pp. 286-292
Author(s):  
Choung Ah Lee ◽  
Gi Woon Kim ◽  
Yu Jin Kim ◽  
Hyung Jun Moon ◽  
Yong Jin Park ◽  
...  
Keyword(s):  
Cardiac Arrest ◽  
Neurological Outcome ◽  
Life Support ◽  
Advanced Cardiac Life Support ◽  
Spontaneous Circulation ◽  
Good Neurological Outcome ◽  
Epinephrine Administration ◽  
Return Of Spontaneous Circulation ◽  
Significant Difference ◽  
Hospital Cardiac Arrest

Objectives: The purpose of this study was to analyze the effect of cardiac arrest recognition by emergency medical dispatch on the pre-hospital advanced cardiac life support and to investigate the outcome of out-of-hospital cardiac arrest. Method: This study was conducted to evaluate the out-of-hospital cardiac arrest patients over 18 years of age, excluding trauma and poisoning patients, from 1 August 2015 to 31 July 2016. We investigated whether it was a cardiac-arrest recognition at dispatch. We compared the pre-hospital return of spontaneous circulation, the rate of survival admission and discharge, good neurological outcome, and also analyzed the time of securing vein, time of first epinephrine administration, and arrival time of paramedics. Results: A total of 3695 out-of-hospital cardiac arrest patients occurred during the study period, and 1468 patients were included in the study. Resuscitation rate by caller was significantly higher in the recognition group. The arrival interval between the first and second emergency service unit was shorter as 5.1 min on average, and the connection rate of paramedics and physicians before the arrival was 32.3%, which was significantly higher than that of the unrecognized group. The mean time required to first epinephrine administration was 13.1 min, which was significantly faster in the recognition group. However, there was no statistically significant difference between the two groups in patients with good neurological outcome, and rather the rate of return of spontaneous circulation and survival discharge was significantly higher in the non-recognition group. Conclusion: Although the recognition of cardiac arrest at dispatch does not directly affect survival rate and good neurological outcome, the activation of pre-hospital advanced cardiac life support and the shortening the time of epinephrine administration can increase pre-hospital return of spontaneous circulation. Therefore, effort to increase recognition by dispatcher is needed.

Humerus intraosseous administration of epinephrine in normovolemic and hypovolemic porcine model

2018 ◽  
Vol 13 (2) ◽  
pp. 97-106
Author(s):  
LTC Robert P. Long, II, PhD, CRNA ◽  
LTC Stephanie M. Gardner, DNP, CRNA ◽  
James Burgert, DNAP, CRNA ◽  
LTC Craig A. Koeller, DVM, DACLAM, AFRL ◽  
LTC Joseph O’Sullivan, PhD, CRNA ◽  
...  
Keyword(s):  
Cardiac Arrest ◽  
Blood Volume ◽  
Maximum Concentration ◽  
Porcine Model ◽  
Spontaneous Circulation ◽  
Rate Of Return ◽  
Blood Samples ◽  
Return Of Spontaneous Circulation ◽  
Mean Concentration ◽  
Over Time

Objective: Compare the maximum concentration (Cmax), time to maximum concentration (Tmax), mean concentration, rate of return of spontaneous circulation (ROSC), time to ROSC, and odds of ROSC when epinephrine is administered by humerus intraosseous (HIO) compared to intravenous (IV) routes in both a hypovolemic and normovolemic cardiac arrest model.Design: Prospective, between subjects, randomized experimental study.Setting: TriService Facility.Subjects: Twenty-eight adult Yorkshire Swine were randomly assigned to four groups: HIO normovolemia; HIO hypovolemia; IV normovolemia; and IV hypovolemia.Intervention: Swine were anesthetized. The hypovolemic group was exsanguinated 31 percent of their blood volume. Subjects were placed into arrest. After 2 minutes, cardiopulmonary resuscitation (CPR) was initiated. After another 2 minutes, 1 mg epinephrine was given by IV or HIO routes; blood samples were collected over 4 minutes. Hypovolemic groups received 500 mL of 5 percent albumin following blood sampling. CPR continued until ROSC or for 30 minutes.Main outcome measures: ROSC, time to ROSC, Cmax, Tmax, mean concentrations over time, odds of ROSC.Results: Cmax was significantly higher, the Tmax, and the time to ROSC were significantly faster in the HIO normovolemic compared to the HIO hypovolemic group (p 0.05). All seven in the HIO normovolemic group achieved ROSC compared to three of the HIO hypovolemic group. Odds of ROSC were 19.2 times greater in the HIO normovolemic compared the HIO hypovolemic group.Conclusion: The HIO is an effective route in a normovolemic model. However, the findings indicate that sufficient blood volume is essential for ROSC in a hypovolemic scenario.

scholarly journals Utility of opening rhythms in predicting time to return of spontaneous circulation in cardiac arrest victims in a resource constrained setting: a single centre prospective observational study

2019 ◽  
Vol 7 (12) ◽  
pp. 4709
Author(s):  
Appu Suseel ◽  
Siju V. Abraham ◽  
Radha K. R.
Keyword(s):  
Cardiac Arrest ◽  
Hospital Discharge ◽  
Cardiopulmonary Arrest ◽  
Spontaneous Circulation ◽  
Secondary Outcome ◽  
Resource Constrained ◽  
Return Of Spontaneous Circulation ◽  
Shockable Rhythm ◽  
Significant Difference ◽  
Mean Time

Background: Time to ROSC has been shown to be an important and independent predictor of mortality and adverse neurological outcome. In resource limited situations judicious deployment of resources is crucial. Prognostication of arrest victims may aid in better resource allocation. This study aimed to assess the time to Return of Spontaneous Circulation (ROSC) in cardiac arrest victims and its relationship with opening rhythms.Methods: Consecutive victims of cardiopulmonary arrest who presented to a single center were included in this study if they met the inclusion and exclusion criteria. Time at which opening rhythm was analyzed and time at which ROSC was achieved was noted. This was done for all cases and mean time to ROSC was calculated for each opening rhythm. All those patients who achieved ROSC were followed up till hospital discharge or death.  Primary outcome measured was achievement of ROSC and the secondary outcome was the survival to hospital discharge.Results: A sample size of 100 was calculated to yield a significance criterion of 0.05 and a power of 0.80 based on prior studies. Out of 100 patients studied. 58% had shockable rhythms and 42% had non-shockable rhythms.  Mean time to ROSC for shockable rhythm was 5.55±3.51 minutes, and for non-shockable rhythm is 17.29±4.18 minutes.  There was a statistically significant difference between opening rhythms in terms of survival to hospital discharge (p=0.0329).Conclusions: Cardiac arrests with shockable rhythms attained ROSC faster when compared to nonshockable rhythms. Shockable rhythms have a better survival to hospital discharge when compared to shockable rhythms. Opening rhythms may aid the clinician in better utility of resources in a resource constrained setting.

scholarly journals Survival of patients with and without diabetes following out-of-hospital cardiac arrest: A nationwide Danish study

2019 ◽  
Vol 9 (6) ◽  
pp. 599-607 ◽  
Author(s):  
Grímur Høgnason Mohr ◽  
Kathrine B Søndergaard ◽  
Jannik L Pallisgaard ◽  
Sidsel Gamborg Møller ◽  
Mads Wissenberg ◽  
...  
Keyword(s):  
Cardiac Arrest ◽  
Confidence Interval ◽  
Odds Ratio ◽  
Heart Rhythm ◽  
Spontaneous Circulation ◽  
Return Of Spontaneous Circulation ◽  
Significant Difference ◽  
Bystander Cardiopulmonary Resuscitation ◽  
Hospital Cardiac Arrest ◽  
Diabetes Patients

Background: Research regarding out-of-hospital cardiac arrest (OHCA) survival of diabetes patients is sparse and it remains unknown whether initiatives to increase OHCA survival benefit diabetes and non-diabetes patients equally. We therefore examined overall and temporal survival in diabetes and non-diabetes patients following OHCA. Methods: Adult presumed cardiac-caused OHCAs were identified from the Danish Cardiac Arrest Registry (2001–2014). Associations between diabetes and return of spontaneous circulation upon hospital arrival and 30-day survival were estimated with logistic regression adjusted for patient- and OHCA-related characteristics. Results: In total, 28,955 OHCAs were included of which 4276 (14.8%) had diabetes. Compared with non-diabetes patients, diabetes patients had more comorbidities, same prevalence of bystander-witnessed arrests (51.7% vs. 52.7%) and bystander cardiopulmonary resuscitation (43.2% vs. 42.0%), more arrests in residential locations (77.3% vs. 73.0%) and were less likely to have shockable heart rhythm (23.5% vs. 27.9%). Temporal increases in return of spontaneous circulation and 30-day survival were seen for both groups (return of spontaneous circulation: 8.8% in 2001 to 22.3% in 2014 (diabetes patients) vs. 7.8% in 2001 to 25.7% in 2014 (non-diabetes patients); and 30-day survival: 2.8% in 2001 to 9.7% in 2014 vs. 3.5% to 14.8% in 2014, respectively). In adjusted models, diabetes was associated with decreased odds of return of spontaneous circulation (odds ratio 0.74 (95% confidence interval 0.66–0.82)) and 30-day survival (odds ratio 0.56 (95% confidence interval 0.48–0.65)) (interaction with calendar year p=0.434 and p=0.243, respectively). Conclusion: No significant difference in temporal survival was found between the two groups. However, diabetes was associated with lower odds of return of spontaneous circulation and 30-day survival.

scholarly journals Therapeutic hypothermia and neurological outcome after cardiac arrest

2011 ◽  
Vol 68 (6) ◽  
pp. 495-499 ◽  
Author(s):  
Milovan Petrovic ◽  
Gordana Panic ◽  
Aleksandra Jovelic ◽  
Tibor Canji ◽  
Ilija Srdanovic ◽  
...  
Keyword(s):  
Cardiac Arrest ◽  
Therapeutic Hypothermia ◽  
Neurological Outcome ◽  
Mild Hypothermia ◽  
Spontaneous Circulation ◽  
Neurologic Outcome ◽  
Return Of Spontaneous Circulation ◽  
Significant Difference ◽  
Normothermic Group ◽  
The Impact

Introduction/Aim. The most important clinically relevant cause of global cerebral ischemia is cardiac arrest. Clinical studies showed a marked neuroprotective effect of mild hypothermia in resuscitation. The aim of this study was to evaluate the impact of mild hypothermia on neurological outcome and survival of the patients in coma, after cardiac arrest and return of spontaneous circulation. Methods. The prospective study was conducted on consecutive comatose patients admitted to our clinic after cardiac arrest and return of spontaneous circulation, between February 2005 and May 2009. The patients were divided into two groups: the patients treated with mild hypothermia and the patients treated conservatively. The intravascular in combination with external method of cooling or only external cooling was used during the first 24 hours, after which spontaneous rewarming started. The endpoints were survival rate and neurological outcome. The neurological outcome was observed with Cerebral Performance Category Scale (CPC). Follow-up was 30 days. Results. The study was conducted on 82 patients: 45 patients (age 57.93 ? 14.08 years, 77.8% male) were treated with hypothermia, and 37 patients (age 62.00 ? 9.60 years, 67.6% male) were treated conservatively. In the group treated with therapeutic hypothermia protocol, 21 (46.7%) patients had full neurological restitution (CPC 1), 3 (6.7%) patients had good neurologic outcome (CPC 2), 1 (2.2%) patient remained in coma and 20 (44.4%) patients finally died (CPC 5). In the normothermic group 7 (18.9%) patients had full neurological restitution (CPC 1), and 30 (81.1%) patients remained in coma and finally died (CPC 5). Between the two therapeutic groups there was statistically significant difference in frequencies of different neurologic outcome (p = 0.006), specially between the patients with CPC 1 and CPC 5 outcome (p = 0.003). In the group treated with mild hypothermia 23 (51.1%) patients survived, and in the normothermic group 30 (81.1%) patients died, while in the group of survived patients 23 (76.7%) were treated with mild hypothermia (p = 0.003). Conclusion. Mild therapeutic hypothermia applied after cardiac arrest improved neurological outcome and reduced mortality in the studied group of comatose survivors.

scholarly journals Prediction of Neurologically Intact Survival in Cardiac Arrest Patients without Pre-Hospital Return of Spontaneous Circulation: Machine Learning Approach

2021 ◽  
Vol 10 (5) ◽  
pp. 1089
Author(s):  
Dong-Woo Seo ◽  
Hahn Yi ◽  
Hyun-Jin Bae ◽  
Youn-Jung Kim ◽  
Chang-Hwan Sohn ◽  
...  
Keyword(s):  
Machine Learning ◽  
Cardiac Arrest ◽  
Neurological Outcome ◽  
Cerebral Performance Category ◽  
Area Under The Curve ◽  
Spontaneous Circulation ◽  
Good Neurological Outcome ◽  
Return Of Spontaneous Circulation ◽  
Neurological Outcomes ◽  
Neurologically Intact

Current multimodal approaches for the prognostication of out-of-hospital cardiac arrest (OHCA) are based mainly on the prediction of poor neurological outcomes; however, it is challenging to identify patients expected to have a favorable outcome, especially before the return of spontaneous circulation (ROSC). We developed and validated a machine learning-based system to predict good outcome in OHCA patients before ROSC. This prospective, multicenter, registry-based study analyzed non-traumatic OHCA data collected between October 2015 and June 2017. We used information available before ROSC as predictor variables, and the primary outcome was neurologically intact survival at discharge, defined as cerebral performance category 1 or 2. The developed models’ robustness were evaluated and compared with various score metrics to confirm their performance. The model using a voting classifier had the best performance in predicting good neurological outcome (area under the curve = 0.926). We confirmed that the six top-weighted variables predicting neurological outcomes, such as several duration variables after the instant of OHCA and several electrocardiogram variables in the voting classifier model, showed significant differences between the two neurological outcome groups. These findings demonstrate the potential utility of a machine learning model to predict good neurological outcome of OHCA patients before ROSC.

scholarly journals Do carboxyhemoglobin and methemoglobin levels predict the return of spontaneous circulation and prognosis of cardiac arrest patients?

2021 ◽  
Author(s):  
Onur Tezel ◽  
Sedat Bilge ◽  
Yahya Ayhan Acar ◽  
Gokhan Ozkan
Keyword(s):  
Cardiac Arrest ◽  
Prognostic Marker ◽  
Blood Gas Analysis ◽  
Predictive Marker ◽  
Spontaneous Circulation ◽  
Gas Analysis ◽  
Blood Gas ◽  
Return Of Spontaneous Circulation ◽  
Survivor Group ◽  
Significant Difference

Introduction: Early prediction of return of spontaneous circulation (ROSC) for cardiac arrest (CA) patients is a major challenge. This study’s goal was to investigate the value of the carboxyhemoglobin (COHb) and methemoglobin (MetHb) levels as a predictive marker for ROSC and prognostic marker for patients who achieve ROSC. Methods: A total of 241 adult patients (109 female, 132 male) diagnosed as non-traumatic CA were included in the study. The patients were divided into two groups based on whether they achieved ROSC. Complete blood count parameters, routine biochemistry measurements, coagulation parameters, and blood gas analysis, and cardiac markers values were compared between the groups. Results: COHb levels were significantly lower in the non-ROSC group (0.71 ± 0.57%) than in the ROSC group (0.95 ± 0.76%) and in the non-survival group (0.78 ± 0.53%) compared to the survivor group (1.45 ± 1.31%) (p =0.002, 0.022 respectively). There was no significant difference between the ROSC and non-ROSC groups and survivor group and non-survivor groups in terms of MetHb levels (p = 0.769 and 0.668, respectively). Conclusions: COHb levels in the blood gas analysis at the time of admission could be used as a predictive marker for ROSC and prognostic marker for the patients who achieved ROSC.

scholarly journals Comparison of Dopamine and Norepinephrine Use for the Treatment of Hypotension in Out-Of-Hospital Cardiac Arrest Patients with Return of Spontaneous Circulation

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Chao-Jui Li ◽  
Kuan-Han Wu ◽  
Chien-Chih Chen ◽  
Yat-Yin Law ◽  
Po-Chun Chuang ◽  
...  
Keyword(s):  
Cardiac Arrest ◽  
Combined Therapy ◽  
Combined Treatment ◽  
Study Groups ◽  
Therapeutic Agents ◽  
Spontaneous Circulation ◽  
Return Of Spontaneous Circulation ◽  
Significant Difference ◽  
The Impact ◽  
Hospital Cardiac Arrest

In patients experiencing out-of-hospital cardiac arrest (OHCA), hypotension is common after return of spontaneous circulation (ROSC). Both dopamine and norepinephrine are recommended as inotropic therapeutic agents. This study aimed to determine the impact of the use of these two medications on hypotension. This is a multicenter retrospective cohort study. OHCA patients with ROSC were divided into three groups according to the post resuscitation inotropic agent used for treatment in the emergency department, namely, dopamine, norepinephrine, and dopamine and norepinephrine combined therapy. Thirty-day survival and favorable neurologic performance were analyzed among the three study groups. The 30-day survival and favorable neurologic performance rates in the three study groups were 12.5%, 13.0%, and 6.8% as well as 4.9%, 4.3%, and 1.2%, respectively. On controlling the potential confounding factors by logistic regression, there was no difference between dopamine and norepinephrine treatment in survival and neurologic performance (adjusted odds ratio (aOR): 1.0, 95% confidence interval (CI) 0.48–2.06; aOR: 0.8, 95% CI: 0.28–2.53). The dopamine and norepinephrine combined treatment group had worse outcome (aOR: 0.6, 95% CI: 0.35–1.18; aOR: 0.2, 95% CI: 0.05–0.89). In conclusion, there was no significant difference in post-ROSC hypotension treatment between dopamine and norepinephrine in 30-day survival and favorable neurologic performance rates.

Effects of tibial and humerus intraosseous administration of epinephrine in a cardiac arrest swine model

2016 ◽  
Vol 11 (4) ◽  
pp. 243-251 ◽  
Author(s):  
Denise Beaumont, MSN, CRNA ◽  
Asal Baragchizadeh, MS, PhD Candidate ◽  
Charles Johnson, MA ◽  
Don Johnson, PhD
Keyword(s):  
Cardiac Arrest ◽  
Maximum Concentration ◽  
High Performance ◽  
Spontaneous Circulation ◽  
Swine Model ◽  
Epinephrine Administration ◽  
Life Saving ◽  
Significant Difference ◽  
Liquid Chromatography Tandem Mass ◽  
Over Time

Objective: Compare maximum concentration (Cmax), time to maximum concentration (Tmax), mean serum concentration of epinephrine, return of spontaneous circulation (ROSC), time to ROSC, and odds of survival relative to epinephrine administration by humerus intraosseous (HIO), tibial intraosseous (TIO), and intravenous (IV) routes in a swine cardiac arrest model.Design: Prospective, between subjects, randomized experimental design.Setting: TriService Research Facility.Subjects: Yorkshire-cross swine (n = 28).Intervention: Swine were anesthetized and placed into cardiac arrest. After 2 minutes, cardiopulmonary resuscitation was initiated. After an additional 2 minutes, a dose of 1 mg of epinephrine was administered by HIO, TIO, or the IV routes. Blood samples were collected over 4 minutes and analyzed by high-performance liquid chromatography tandem mass spectrometry.Main Outcome Measurements: ROSC, time to ROSC, Cmax, Tmax, mean concentrations over time, and odds ratio.Results: There was no significant difference in rate of the ROSC among the TIO, HIO, and IV groups (p 0.05). There were significant differences in Cmax: the HIO group was significantly higher than the TIO group (p = 0.007), but no significant difference between the IV and HIO (p = 0.33) or the IV and TIO group (p = 0.060). The Tmax was significantly shorter for both the IV and HIO versus the TIO group (p 0.05), but no difference between IV and HIO (p = 0.328). The odds of survival were higher in the HIO group compared to all other groups.Conclusion: The TIO and HIO provide rapid and reliable access to administer life-saving medications during cardiac arrest.

The comparison of humeral intraosseous and intravenous administration of vasopressin on return of spontaneous circulation and pharmacokinetics in a hypovolemic cardiac arrest swine model

2016 ◽  
Vol 11 (4) ◽  
pp. 237-242 ◽  
Author(s):  
Mark H. Wimmer, BSN ◽  
Kenneth Heffner, BSN ◽  
Michael Smithers, BSN ◽  
Richard Culley, BSN ◽  
Jennifer Coyner, PhD, CRNA ◽  
...  
Keyword(s):  
Cardiac Arrest ◽  
Analysis Of Variance ◽  
Repeated Measures ◽  
Maximum Concentration ◽  
Life Support ◽  
Spontaneous Circulation ◽  
Control Group ◽  
Swine Model ◽  
Return Of Spontaneous Circulation ◽  
Significant Difference

Introduction: The American Heart Association (AHA) recommends intravenous (IV) or intraosseous (IO) vasopressin in Advanced Cardiac Life Support (ACLS). Obtaining IV access in hypovolemic cardiac arrest patients can be difficult, and IO access is often obtained in these life threatening situations. No studies have been conducted to determine the effects of humeral IO (HIO) access with vasopressin in the return of spontaneous circulation (ROSC). Our study compared the kinetics of vasopressin and ROSC with HIO with IV access in the hypovolemic swine model.Methods: Twenty-two Yorkshire swine were divided into three groups: HIO (n = 7), IV (n = 8), and a control group (n = 7). The IV and HIO group received vasopressin and cardiopulmonary resuscitation (CPR), while the control group received only CPR. All subjects were exsanguinated 31 percent of their blood volume, placed in cardiac arrest, and resuscitated per ACLS. Subjects that achieved ROSC were then monitored for 20 minutes. Blood samples (10 mL) collected at 0.5, 1, 1.5, 2, 2.5, 3, and 4 minutes after vasopressin injection and analyzed for maximum concentration (Cmax) and time to maximum concentration (Tmax). Data were analyzed using a multivariate analysis of variance (MANOVA) and a Fisher's Exact Test.Results: ROSC was achieved in every subject that received vasopressin via the HIO route. Data analysis using a MANOVA pairwise comparison revealed no difference between mean Cmax (p = 0.601) and Tmax (p = 0.771) of vasopressin administered IV versus HIO routes. Analysis of the mean serum concentrations at time intervals using a repeated measures analysis of variance found no difference (p 0.05). A Fisher's Exact Test revealed no difference in rate of ROSC between HIO and IV groups (p 0.05). Odds ratio determined that there was a 33 times higher chance of survival among HIO subjects versus control (CPR and Defibrillation; p = 0.03) and no difference in the survivability of the HIO or IV groups (p = 0.52). Conclusion: The data from this study strongly suggest that there is no significant difference in ROSC, time to ROSC, hemodynamics, or pharmacokinetics between HIO vasopressin and IV vasopressin. This research reinforces current AHA guidelines recommending the use of HIO route early over delaying care awaiting IV access.

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