Risk factors for vasovagal reaction associated with cerebral angiography via femoral catheterisation

Non-fasting versus fasting before percutaneous cardiac procedures: a systematic review and meta-analysis of randomized controlled trials

BACKGROUND AND OBJECTIVE

Despite the absence of scientific evidence, fasting before percutaneous cardiac catheterization is still recommended to minimize complications. This systematic review and meta-analysis aimed to compare the outcomes of non-fasting protocols in patients undergoing percutaneous cardiac procedures.

MATERIALS AND METHODS

A systematic search of PubMed, Scopus, WOS, Embase, and Cochrane was conducted until September 2024. Dichotomous outcomes were pooled using risk ratio (RR), while continuous outcomes were pooled using standardized mean difference (SMD).

PROSPERO ID

CRD42024586147.

RESULTS

Five RCTs with 2034 patients were included. There was no significant difference between both groups regarding patient satisfaction score [SMD - 0.65, 95% CI (- 1.39, 0.09), P = 0.08], intra/postoperative aspiration (RR 1.00, 95% CI [0.20, 4.96], P = 1.00), postprocedural pneumonia (RR 0.60, 95% CI [0.14, 2.51], P = 0.49), emergency endotracheal intubation (RR 0.99, 95% CI [0.10, 9.51], P = 1.00), nausea/vomiting (RR 0.89, 95% CI [0.46, 1.76], P = 0.75), anti-emetic use (RR 0.49, 95% CI [0.24, 1.03], P = 0.06), hypoglycemia (RR 0.74, 95% CI [0.43, 1.28], P = 0.28), and the need for inotrope/vasopressor therapy (RR 1.03, 95% CI [0.81, 1.30], P = 0.82). However, the non-fasting approach significantly decreased the sensation of tiredness/fatigue (SMD - 0.31 with 95% CI [- 0.51, - 0.11], P < 0.001).

CONCLUSION

The non-fasting protocol demonstrated comparable efficacy, safety, and overall satisfaction to the conventional fasting approach. REVIEW REGISTRATION : PROSPERO CRD42024586147.

Risk factors for vasovagal reactions in blood donors: A systematic review and meta-analysis

BACKGROUND

While blood donation is generally safe, some donors experience vasovagal reactions (VVRs) that may lead to injury and reduce likelihood of future donation. Several risk factors for VVRs have been identified, but the consistency, magnitude, and validity of their associations have not been systematically evaluated. Therefore, this systematic review and meta-analysis synthesized evidence for VVR risk factors.

METHODS

Database searches identified English-language studies published before February 2024 describing VVR risk factors in voluntary whole blood donors. Study characteristics, VVR and risk factor assessment methods, and effect sizes were extracted. Random-effects models pooled estimates across all studies and subgroups of geographical context, study quality, donation experience, and outcome severity. Inconsistently and infrequently reported risk factors were narratively synthesized.

RESULTS

Totally 71 studies reporting a total of 19 million total donations were included. Female sex, new donor status, younger age, smaller blood volume, and lower blood pressure were positively associated with higher VVR risk. Donation-related fear, anxiety, and disgust were associated with higher VVR risk in narrative syntheses. Substantial between-study heterogeneity (I2 > 90%) was observed for the majority of risk factors, while there was no clear evidence of subgroup variability and small study effects.

CONCLUSION

This systematic review and meta-analysis provides a comprehensive synthesis of risk factors for VVRs across wide-ranging blood service contexts and symptom severities, reinforcing evidence for previously identified factors. The heterogeneous associations of several risk factors motivate large-scale studies that enable comprehensive multivariable adjustment to evidence donor selection criteria and preventative intervention allocation.

Three Artificial Liver Models of Treatment of Acute-on-Chronic Liver Failure

Background

This study aimed to investigate clinical efficacy, safety and short-term prognosis of plasma exchange (PE), plasma perfusion combining PE (PP+PE), dual-plasma molecular adsorption system combining PE (DPMAS+PE) in treating acute-on-chronic liver failure (ACLF).

Methods

Two hundred and fourteen ACLF patients admitted to our hospital were included and divided into PE (n = 72), PP+PE (n = 75), DPMAS+PE group (n = 67). Laboratory indexes and MELD scores were collected, and clinical efficacy was compared. Patients' adverse reactions during and 24-h after treatment were collected, and safety was compared. Survival status of patients was followed-up within 90 days, and prognosis was analyzed.

Results

PE, PP+PE and DPMAS+PE significantly reduce TBiL, DBiL, ALT, AST, SA, PT, INR, PCT and CRP levels, and increase PA and PTA levels, compared with pre-treatments (P < 0.05). WBC and SCR levels in DPMAS+PE group decreased significantly post-treatment (P < 0.05). Na+ and Cl- levels in PE and PP+PE group decreased significantly post-treatment (P < 0.05). Total adverse reaction incidence in PE, PP+PE, DPMAS+PE group were 38.89%, 22.70%, 17.90%, respectively, with significant differences among three groups (P < 0.05). Ninety-day mortality rates of patients in PE, PP+PE, DPMAS+PE group were 41.67%, 34.67%, 20.90%, respectively, with significant differences among three groups (P < 0.05).

Conclusion

PE, PP+PE and DPMAS+PE three artificial liver treatment modes can effectively improve liver, kidney and coagulation function of ACLF patients. DPMAS+PE demonstrated better ability to remove endotoxin and inflammatory mediators, showed advantages in reducing ACLF patient mortality within 90 days, and had the least impact on electrolyte post-treatment. Therefore, DPMAS+PE can be used as a better choice for clinical treatment.

A Randomized Controlled Trial of Nonfasting vs Fasting Before Interventional Coronary Procedures: The TONIC Trial

BACKGROUND

Fasting before coronary procedures is currently recommended to reduce complications despite the lack of scientific evidence.

OBJECTIVES

The TONIC (Comparison Between Fasting and No Fasting Before Interventional Coronary Intervention on the Occurrence of Adverse Events) noninferiority trial investigated the safety and comfort of a nonfasting strategy (ad libitum food and drinks) vs traditional fasting (>6 hours for solid food and liquids) before coronary procedures.

METHODS

In this monocentric, prospective, single-blind randomized controlled trial, 739 patients undergoing coronary procedures were included and randomized to a fasting or a nonfasting strategy. Emergency procedures were excluded. The primary endpoint was a composite of vasovagal reaction, hypoglycemia (defined by blood sugar ≤0.7 g/L), and isolated nausea and/or vomiting. Noninferiority margin was 4%. Secondary endpoints were contrast-induced nephropathy and patients' satisfaction.

RESULTS

Among the 739 procedures (697 elective and 42 semiurgent), 517 angiographies, and 222 angioplasties (including complex and high-risk procedures) were performed. The primary endpoint occurred in 30 of 365 nonfasting patients (8.2%) vs 37 of 374 fasting patients (9.9%), demonstrating noninferiority (absolute between-group difference, -1.7%; 1-sided 95% CI upper limit: 1.8%). No food-related adverse event occurred, and contrast-related acute kidney injuries were similar between groups. Overall, procedure satisfaction and perceived pain were similar in both groups, but nonfasting patients reported less hunger and thirst (P < 0.01). In case of redo coronary procedures, most patients (79%) would choose a nonfasting strategy.

CONCLUSIONS

The TONIC randomized trial demonstrates the noninferiority of a nonfasting strategy to the usual fasting strategy for coronary procedures regarding safety, while improving patients' comfort.

Treating Femoral Artery Pseudoaneurysm by Tumescence Anesthesia and Echo-Guided Compression Technique (TACT): Clinical Outcome in 82 Consecutive Patients

PURPOSE

Pseudoaneurysm (PA) of the access artery is a common and potentially severe complication after percutaneous endovascular interventions. Most PA require interventional therapy, including thrombin injection, covered stent implantation, or surgical repair, which are costly and associated with other complications. Treating PA by external compression is uncomfortable and time consuming, with a low success rate. By injecting local tumescence anesthesia around the PA and close to its neck, the tumescence anesthesia and echo-guided compression technique (TACT) aims to improve efficacy and patient's comfort.

MATERIALS AND METHODS

We retrospectively reviewed all consecutive patients treated for femoral PA in our center from May 2009 to July 2019 and estimated efficacy and safety. Vascular specialists performed TACT according to a standardized protocol including ultrasound-guided injection of tumescence solution (45 ml of 0.9% saline, 15 ml of lidocaine 1%/epinephrine 5 μg/ml) in the soft tissue around the PA and its neck, local compression with the sonography probe until PA closure, and external compression by elastic belt for 3 hours.

RESULTS

Among a total of 125 patients with femoral artery PA, 82 (65.6%) were treated by TACT (including 3 patients with haemorrhagic shock), 14 (11.2%) by thrombin injection; 12 (9.6%) by endovascular interventions; 8 (6.4%) by open surgery; and 9 (7.2%) conservatively. In patients treated by TACT, PA neck was short (<1 cm) in 51.8% and mean cavity diameter 30 ± 23 mm. After injection of 58 ± 8 ml of tumescence solution, mean time of echo-guided compression was 12 ± 8 minutes. Pseudoaneurysm was successfully closed in 92.7% after the first attempt and in 96.3% after the second attempt. The intervention was well tolerated, without any adverse event.

CONCLUSION

Tumescence anesthesia and echo-guided compression technique (TACT) is an effective and safe treatment for PA. Compared to other therapies, TACT is minimally invasive and widely available for minimal costs, even for large PA and in unstable patients.

CLINICAL IMPACT

Tumescence anesthesia and echo-guided compression technique seems to be an efficient, safe, and a fair economical choice in comparison with alternative techniques. The implementation of this procedure is simple with low risk of complications. Based on the results of this study, we believe that TACT should be considered as the first-line treatment of most iatrogenic PA.

Effects of Valsalva Maneuver on Pain and Vasovagal Reaction During the Removing of Femoral Arterial Sheath After Percutaneous Coronary Intervention: A Randomized Controlled Trial

PURPOSE

The objective of this study was to investigate the effects of the Valsalva maneuver on pain and vasovagal reactions during femoral arterial sheath removal in patients undergoing percutaneous coronary intervention.

DESIGN

This study was a randomized controlled trial.

METHODS

In this study, 60 patients undergoing elective coronary angioplasty were randomly assigned to the intervention and control groups. After angioplasty, the patients in the intervention group performed the Valsalva maneuver (20-30 mm Hg) for 10 seconds during the sheath removal. Conversely, in the control group, no inspiratory pressure was applied. Before and immediately after the sheath removal, the patients' pain, vital signs, and vasovagal reactions were measured.

FINDINGS

The primary characteristics of the patients were similar in the two groups. The patients in the intervention group had significantly lower pain scores during femoral sheath removal compared to the control group (2.33 ± 1.56 vs 5.56 ± 3.08, P < .001). The Valsalva maneuver during femoral sheath removal decreased the patients' heart rate in the intervention group compared to the control group (78.26 ± 12.37 vs 85.46 ± 11.79, P < .001); however, blood pressure and vasovagal reactions were not significantly different.

CONCLUSIONS

This study showed that the Valsalva maneuver during femoral arterial sheath removal can reduce the pain severity score, without increasing the incidence of vasovagal reactions.

Characterization of an Artificial Liver Support System-Related Vasovagal Reaction

Objective

An artificial liver support system (ALSS) is an effective therapy for patients with severe liver injury. A vasovagal reaction (VVR) is a common complication in various treatment settings but has not been reported previously in ALSS.

Methods

This study retrospectively evaluated patients who suffered an ALSS-related VRR between January 2018 and June 2019. We collected data from VVR episodes including onset time, duration, changes in heart rate (HR) and blood pressure (BP), and drug treatment.

Results

Among 637 patients who underwent ALSS treatment, 18 were included in the study. The incidence of VVR was approximately 2.82%. These patients were characterized by a rapid decrease in BP or HR with associated symptoms such as chest distress, nausea, and vomiting. The majority of patients (78%) suffered a VVR during their first ALSS treatment. Sixteen patients (89%) had associated symptoms after treatment began. Sixteen patients (89%) received human albumin or Ringer's solution. Atropine was used in 11 patients (61%). The symptoms were relieved within 20 min in 15 patients and over 20 min in 3 patients.

Conclusions

A VVR is a rare complication in patients with severe liver injury undergoing ALSS treatment. Low BP and HR are the main characteristics of a VVR.

Comparison of Transfemoral Cerebral Angiography and Transradial Cerebral Angiography Following a Shift in Practice During Four Years at a Single Center in China

Background

Cerebral angiography, or intra-arterial digital subtraction angiography (DSA), is a fluoroscopic imaging technique. In China, until recently, transfemoral access (TFA) has been used, rather than transradial access (TRA). This retrospective study aimed to compare transfemoral cerebral angiography (TFCA) with transradial cerebral angiography (TRCA) consecutively performed by the same operator, at a single center in China, to determine whether there were benefits from the shift from TFA to TRA in terms of efficiency, safety, and feasibility.

Material/Methods

A review of 1,048 cerebral angiograms in 980 patients was performed by a single operator from June 2014 to May 2018, including the TFA group (n=513) and the transradial access (TRA) group (n=535), and 39 patients underwent both TFA and TRA. The total procedure time, duration of fluoroscopy, catheterization success rate, image quality, length of stay in hospital, complications of the procedure, and patient preference were compared between the groups.

Results

Compared with TFCA, TRCA resulted in significantly shorter total procedure time, a higher catheterization success rate, better image quality, and shorter duration of hospital stay (P<0.05). There was no significant difference between the TFA and TRA groups for cardiovascular, cerebral, and access site complications. Patients in the TRA group showed a significantly reduced fluoroscopy time at the early stages of operator training (P<0.05). Patient preference included TRA (76.74%), TFA (16.28%), and no preference (6.89%).

Conclusions

During four years at a single center, and with a single operator, TRCA was safe, feasible, and more rapid when compared with TFCA.

Vascular complications in patients who underwent endovascular cardiac procedures: multicenter cohort study

OBJECTIVE

to analyze vascular complications among patients who underwent endovascular cardiac procedures in the hemodynamic laboratories of three referral centers.

METHOD

a multicenter cohort study was conducted in three referral facilities. The sample was composed of 2,696 adult patients who had undergone elective or urgent percutaneous cardiac procedures. The outcomes were vascular complications, such as: hematoma at the site of the arterial puncture; major or minor bleeding; surgical correction for retroperitoneal hemorrhage; pseudoaneurysm; and arteriovenous fistula.

RESULTS

237 (8.8%) of the 2,696 patients presented a vascular complication at the site of the arterial puncture. The total number of vascular complications was 264: minor hematoma<10cm (n=135); stable bleeding (n=86); major hematoma ≥10cm (n=32); and unstable bleeding (n=11). There were no retroperitoneal hematoma events, pseudoaneurysm or arterial venous fistula. Most of the major and minor complications occurred in the first six hours after the procedure.

CONCLUSION

the results concerning the current context of interventional cardiology indicate that the complications predominantly occur in the first six hours after the procedure, considering a 48-hour follow-up. The staff should plan and implement preventive measures immediately after the procedures.