Fast-track cardiac surgery: economic implications in postoperative care

To evaluate the analgesic effectiveness of bilateral erector spinae plane block versus thoracic epidural analgesia in open cardiac surgeries approached through midline sternotomy

BACKGROUND

The efficacy of the erector spinae plane (ESP) block in mitigating postoperative pain has been shown for a range of thoracic and abdominal procedures. However, there is a paucity of literature investigating its impact on postoperative analgesia as well as its influence on weaning and subsequent recovery in comparison to thoracic epidural analgesia (TEA) in median sternotomy-based approach for open-cardiac surgeries and hence the study.

METHODS

Irrespective of gender or age, 74 adult patients scheduled to undergo open cardiac surgery were enrolled and randomly allocated into two groups: the Group TEA (thoracic epidural block) and the Group ESP (bilateral Erector Spinae Plane block). The following variables were analysed prospectively and compared among the groups with regard to pain control, as determined by the VAS Scale both at rest (VASR) and during spirometry (VASS), time to extubation, quantity and frequency of rescue analgesia delivered, day of first ambulation, length of stay in the intensive care unit (ICU), and any adverse cardiac events (ACE), respiratory events (ARE), or other events, if pertinent.

RESULTS

Clinical and demographic variables were similar in both groups. Both groups had overall good pain control, as determined by the VAS scale both at rest (VASR) and with spirometry (VASS) with Group ESP demonstrating superior pain regulation compared to Group TEA during the post-extubation period at 6, 9, and 12 h, respectively (P > 0.05). Although statistically insignificant, the postoperative mean rescue analgesic doses utilised in both groups were comparable, but there was a higher frequency requirement in Group TEA. The hemodynamic and respiratory profiles were comparable, except for a few arrhythmias in Group TEA. With comparable results, early recovery, fast-track extubation, and intensive care unit (ICU) stay were achieved.

CONCLUSIONS

The ESP block has been found to have optimal analgesic effects during open cardiac surgery, resulting in a decreased need for additional analgesic doses and eliminating the possibility of a coagulation emergency. Consequently, it presents itself as a safer alternative to the potentially invasive thoracic epidural analgesia (TEA).

Combining Minimally Invasive Surgery With Ultra-Fast-Track Anesthesia in HeartMate 3 Patients: A Pilot Study

BACKGROUND

Minimally invasive surgery for left ventricular assist device implantation may have advantages over conventional sternotomy (CS). Additionally, ultra-fast-track anesthesia has been linked to better outcomes after cardiac surgery. This study summarizes our early experience of combining minimally invasive surgery with ultra-fast-track anesthesia (MIFTA) in patients receiving HeartMate 3 devices and compares the outcomes between MIFTA and CS.

METHODS

From October 2015 to January 2019, 18 of 49 patients with Interagency Registry for Mechanically Assisted Circulatory Support profiles >1 underwent MIFTA for HeartMate 3 implantation. For bias reduction, propensity scores were calculated and used as a covariate in a regression model to analyze outcomes. Weighted parametric survival analysis was performed.

RESULTS

In the MIFTA group, intensive care unit stays were shorter (mean difference, 8 days [95% CI, 4-13]; P<0.001), and the incidences of pneumonia and right heart failure were lower than those in the CS group (odds ratio, 1.36 [95% CI, 1.01-1.75]; P=0.016, respectively). At 6 and 12 hours postoperatively, MIFTA patients had a better hemodynamic performance with lower pulmonary wedge pressure (mean difference, 2.23 mm Hg [95% CI, 0.41-4.06]; P=0.028) and a higher right ventricular stroke work index (mean difference, -1.49 g·m/m² per beat [95% CI, -2.95 to -0.02]; P=0.031). CS patients had a worse right heart failure-free survival rate (hazard ratio, 2.35 [95% CI, 0.96-5.72]; P<0.01).

CONCLUSIONS

Compared with CS, MIFTA is a beneficial approach for non-Interagency Registry for Mechanically Assisted Circulatory Support 1 HeartMate 3 patients with lower adverse event incidences, better hemodynamic performance, and preserved right heart function. Future large multicentric investigations are required to verify MIFTA's effects on outcomes.

ICU Nurses-An Impact Factor on Patient Turnover in Cardiac Surgery in Western Denmark?

OBJECTIVE

The aim of this study was to describe changes in performance indicators such as length of stay [LOS] in the intensive care unit [ICU] and ventilation time, during the last six years in an attempt to identify associations between patient and systemic performance indicators, including the impact of nurse turnover.

DESIGN

A retrospective study of prospectively registered data (2013-2018). Propensity- score matching was performed to establish comparable groups.

SETTING

Three Danish university hospitals.

PARTICIPANTS

The study included a total of 12,404 adult cardiac surgical patients registered in the Western Denmark Heart Registry. The cohort was divided into an "early" group (2013-2016) and a "late" group (2017-2018).

INTERVENTIONS

An analysis of dynamics in patient indicators and systemic performance indicators, including the impact from selected performance parameters and nurse turnover.

MEASUREMENTS AND MAIN RESULTS

Comorbidity, calculated from the European System for Cardiac Operative Risk Evaluation, and the mean age were stable in the study period. Strong predictors of long LOS in the ICU included postoperative use of inotropes, re-exploration surgery, high postoperative drainage, and the "late" time group. Time parameters (relative risks) were all significantly longer in the "late" time group": ventilation time 1.21 (1.05-1.39), length of stay ICU 1.28 (1.11-1.48), and in-hospital time 1.36 (1.19-1.57). ICU nurse turnover increased from four (2013-2014) to 52 (2017-2018).

CONCLUSION

No single patient factor, such as age or comorbidity, could explain the decrease in patient turnover in the ICU. In the same period, the turnover of ICU nurses increased. Patient turnover is complex and affected by a mix of patient and systemic performance factors.

Efficacy of Preoperative Bilateral Thoracic Paravertebral Block in Cardiac Surgery Requiring Full Heparinization: A Propensity-Matched Study

OBJECTIVES

To assess the efficacy of preoperative bilateral paravertebral block (PVB) with general anesthesia (GA) in contributing to early extubation and decreasing opioid consumption in cardiac surgery.

DESIGN

A propensity score-matched retrospective study.

SETTING

A single tertiary medical center between January 2018 and December 2020.

PARTICIPANTS

Adult patients undergoing isolated first-time aortic valve replacement and coronary artery bypass grafting with full sternotomy.

INTERVENTIONS

A cohort of 44 patients who received PVB with GA (PVB group) was matched with 44 patients who underwent similar surgery with GA only (GA only group).

MEASUREMENTS AND MAIN RESULTS

The completion rate of extubation in the operating room was significantly greater in the PVB group (65.9%) than in the GA only group (43.2%; p = 0.032). The completion rate of extubation within eight hours after surgery also was significantly greater in the PVB group (86.4%) than in the GA only group (68.2%; p = 0.042). The median amount of intraoperative fentanyl administered was significantly less in the PVB group (4.8 µg/kg; interquartile range [IQR], 3.3-7.2) than in the GA only group (8.4 µg/kg; IQR, 5.4-12.7; p < 0.001). The median amount of postoperative fentanyl administered was significantly less in the PVB group (6.8 µg/kg; IQR, 3.9-10.6) than in the GA only group (8.1 µg/kg; IQR, 6.2-15.9; p = 0.012).

CONCLUSIONS

This study demonstrated that preoperative bilateral PVB combined with GA contributed to early extubation in isolated first-time aortic valve replacement and coronary artery bypass grafting and in the reduction of intraoperative and postoperative fentanyl consumption.

Efficacy of paravertebral block in "Fast-tracking" pediatric cardiac surgery - Experiences from a tertiary care center

Introduction:

Fast tracking plays a crucial role in reducing perioperative morbidity and financial burden by facilitating early extubation and discharge from hospital. Paravertebral block (PVB) is becoming more popular in paediatric surgeries as an alternative to epidural and caudal analgesia. There is scarcity of data regarding the efficacy and safety of PVB in paediatric cardiac surgery.

Methods:

We performed a review of records of paediatric cardiac patients who underwent cardiac surgery under general anaesthesia with single shot PVB and compared the analgesia and postoperative outcomes with matched historical controls who underwent cardiac surgery with same anaesthesia protocol without PVB.

Results:

The data from 200 children were analysed. 100 children who received paravertebral block were compared with a matched historical controls. The median time to extubation was shorter in the PVB group (0 hr, IQR 0-3 hrs) compared to the control group (16 hrs, IQR 4-20 hrs) (P value 0.017*). Intraoperative and postoperative fentanyl requirement was much lower in the PVB group (3.49 (0.91)) compared to the control group (9.86 (1.37)) P value <0.01*. Time to first rescue dose of analgesic was longer (7 hrs vs 5 hrs, P 0.01*), while time to extubation and duration of ICU stay were significantly less in PVB group . Mean postoperative pain scores were significantly lower in the PVB group at the time of ICU admission (0.85 vs 3.12, P 0.001*) till 4 hours (2.11 vs 3.32, P 0.001*).

Conclusion:

PVB provides an effective and safe anaesthetic approach which can form an important component of “fast-track” care in paediatric cardiac surgery.

Sublingual Sufentanil Tablet System Versus Continuous Morphine Infusion for Postoperative Analgesia in Cardiac Surgery Patients

OBJECTIVE(S)

To assess the effectiveness and side effects of a patient-controlled sublingual sufentanil tablet system for postoperative analgesia after cardiac surgery and to compare it to a nurse-controlled continuous morphine infusion.

DESIGN

Prospective, open-label, randomized controlled trial.

SETTING

Single university academic center.

PARTICIPANTS

Adult patients undergoing cardiac surgery, which included a sternotomy.

INTERVENTIONS

Sublingual sufentanil tablet system versus nurse-controlled continuous morphine infusion.

MEASUREMENTS AND MAIN RESULTS

A total of 483 cardiac surgery patients were screened for eligibility, of whom 64 patients completed the study. No statistically significant differences were found for baseline characteristics between both groups. All mean numeric rating scale (NRS) pain scores from after extubation until intensive care unit discharge were ≤3 in both groups. The cumulative mean NRS pain score from 24 hours after extubation (primary outcome) (t = hours after extubation) was significantly different in favor of the morphine group: (t = 0-24) (0.8 [0.7] v 1.3 [0.8]; p = 0.006). Later cumulative mean pain scores were also in favor of the morphine group: (t = 24-48) (0.2 [0.3] v 0.6 [0.5]; p = 0.001) and (t = 48-63) (0.0 [0.0] v 0.1 [0.2]; p = 0.013). The cumulative opioid dose (in milligrams intravenous morphine equivalents) was significantly higher in the morphine group compared with the sublingual sufentanil group (241.94 [218.73] v 39.84 [21.96]; p = 0.0001). No differences were found for the incidences of postoperative nausea and vomiting, sedation, hypoventilation, bradycardia, or hypotension between both groups (secondary outcomes).

CONCLUSIONS

Despite resulting in statistically significantly higher pain scores, a patient-controlled sublingual sufentanil tablet system offers adequate analgesia after cardiac surgery and reduces opioid consumption when compared with continuous morphine infusion.

Very Early Discharge After Coronary Artery Bypass Grafting Does Not Affect Readmission or Survival

BACKGROUND

This study evaluated the impact of very early hospital discharge after coronary artery bypass grafting (CABG) on subsequent readmission and survival.

METHODS

Adults undergoing isolated CABG from 2011 to 2018 at a single institution were included. Patients were stratified on the basis of their postoperative length of hospital stay: short stay (≤4 days) and nonshort stay (>4 days). The primary outcomes were longitudinal survival and freedom from hospital readmission. Secondary outcomes included rates of postoperative complications. Propensity score matching with a 1:1 ratio was performed to generate cohorts with comparable baseline characteristics.

RESULTS

A total of 6327 patients underwent CABG during the study period, and a matched cohort of 2286 patients was identified. In matched analysis, the average Society of Thoracic Surgeons predicted risk of operative mortality was low in both groups (average, 0.7%). Rates of postoperative complications were low and several complication rates were even lower in the short-stay cohort: stroke (1.14% vs 0.26%; P = .01), renal failure (0.87% vs 0.09%; P = .007), reoperations (1.84% vs 0.26%; P < .001), and new-onset atrial fibrillation (34.21% vs 13.04%; P < .001). Survival was similar between the matched groups at 30 days (99.56% vs 99.21%), 1 year (97.73% vs 97.46%), and 5 years (91.15% vs 92.48%) (all P > .05). Readmission rates were also comparable at all time intervals, and there were no differences in cardiac-related or heart failure-specific readmissions (all P > .05). Risk-adjusted analyses confirmed these findings.

CONCLUSIONS

This study demonstrates that very early discharge within 4 days of isolated CABG is safe and has no substantial impact on subsequent mortality or readmission risk.

Fast-track cardiac anaesthesia protocols: Is quality pushed to the edge?

Background

The quest for methods expediting rapid postoperative patient turnover has triggered implementation of various fast-track cardiac anaesthesia protocols. Using three different fast-track protocols in randomized controlled studies (RCT) conducted 2010-2016 we found minimal achievements in ventilation time together with actual and eligible length of stay in cardiac recovery unit. The comparable control group patients were evaluated in this retrospective post hoc analysis, for an association between above mentioned parameters and quality parameters, to assess whether the marginal gains have been at the expense of quality of recovery and patient comfort.

Method

90 control patients from three RCT with comparable demographic parameters and receiving standard department treatment were evaluated using time parameters and an objective/semi-objective Intensive Care Unit (ICU) score system (IDS score).

Results

Ventilation time was statistical significant lower in latest study (C) than the early (A) and intermedium (B) studies (A=293, B=261, C=205 minutes; P=0.04). The IDS was lower at extubation and all time points in the early study compared to other studies (P < 0.001;). The average IDS in latest study were the double of previous studies at the end of observations, and marginally above the acceptable score for discharge. The postoperative morphine requirement A=15.0, B=10.0 and C=26.5 mg; P=0.002) was statistical significant higher in the latest study compared to previous studies.

Conclusion

The implementation of strict fast-track protocols resulting in shorter ventilation time did not convert to earlier eligibility to discharge from the ICU. However, the quality of recovery appears challenged.

The Major Decrease in Resource Utilization in Recent Decades Seems Guided by Demographic Changes: Fast Tracking-Real Concept or Demographics

OBJECTIVE

To identify dynamics of associations and potential areas for optimization of patient turnover between various patient profile and comorbidity indicators and selected system performance indicators such as ventilation time, length of stay in the intensive care unit, and in-hospital stay.

DESIGN

Retrospective study of prospectively registered data (2000-2017).

SETTING

Three university hospitals.

PARTICIPANTS

The study comprised 38,100 adult cardiac surgical patients registered in the Western Denmark Heart Registry.

INTERVENTIONS

Analysis of dynamics in patient indicators and system performance indicators, including effect on the selected performance parameters.

MEASUREMENTS AND MAIN RESULTS

Comorbidity, calculated from EuroSCORE, decreased from 2.5 ± 2.2 to 1.5 ± 2.0 (p < 0.001), whereas the average age of patients increased from 65.1 ± 9.9 years to 67.6 ± 10.8 years (p < 0.001). Median ventilation time decreased from 380 to 275 minutes (p < 0.0001). The mean length of stay in the intensive care unit demonstrated a statistically significant decrease from 35.1 hours between 2000 to 2002 to 31.8 hours between 2015 to 2017 (p = 0.004), and the median time was unchanged at 22.0 hours throughout the observation period. The median in-hospital stay decreased from 6.5 to 5.1 days (p < 0.001) and the mean in-hospital stay from 8.7 days (2003-2005) to 7.0 days (2015-2017; p < 0.001). Logistic regression analysis of performance factors showed a statistically significant negative independent effect on most comorbidity and surgical factors.

CONCLUSION

The increase in performance parameters appears to be highly associated with decreased comorbidities and fast-tracking protocols and may only offer limited effect in additional patient turnover.

Association of Overnight Extubation With Outcomes After Cardiac Surgery in the Intensive Care Unit

BACKGROUND

The frequency and safety of overnight extubation (OE) after cardiac surgery across intensive care units (ICUs) is unknown.

METHODS

We performed a retrospective study of adults (≥ 18 years) in US ICUs after coronary artery bypass grafting (CABG) or aortic valve replacement (AVR) or both, using The Society of Thoracic Surgery Adult Cardiac Surgery Database (July 2014 to June 2017); our primary cohort was elective CABGs. We assessed OE (7:00 pm to 6:59 am) frequency and used multilevel regression modelling to identify factors associated with OE. Within mechanical ventilation (MV) duration strata, we used propensity score matching to evaluate associations of OE with reintubations (primary outcome), mortality, and complications.

RESULTS

Among 142,225 patients with elective CABG, 42.2% had OEs. MV duration, cardiopulmonary bypass time, distal anastomosis number, and hospital of admission (median odds ratio [OR] 1.82, 95% confidence interval [CI]: 1.76 to 1.89) were independently associated with OE. After propensity matching, OE was associated with increased reintubation for patients with MV duration of 6 to 8 hours (2.2% vs 1.7%, OR 1.27, 95% CI: 1.04 to 1.56) and decreased reintubation for patients with MV duration of 15 to 17 hours (3.0% vs 4.2%, OR 0.70, 95% CI: 0.50 to 0.97) and 18 to 20 hours (2.3% vs 5.7%, OR 0.39, 95% CI: 0.21 to 0.72); OE was associated with increased ICU length of stay for patients with MV duration of 6 to 8 hours, but reduced length of stay for patients with MV duration of 9 to 20 hours. OE was not associated with increased mortality (hospital, 30-day). Other groups had similar OE rates (nonelective CABGs, 47.6%; elective AVR, 36.0%; elective CABG + AVRs, 51.0%) and outcomes.

CONCLUSIONS

OE is prevalent after cardiac surgery. OE is associated with little risk and reduces ICU length of stay for patients who require MV for more than 8 hours.

Comparison of Remifentanil-Based Fast-Track and Fentanyl-Based Routine Cardiac Anesthesia for Intraoperative Device Closure of Atrial Septal Defect (ASD) in Pediatric Patients

Background

The aim of this study was to evaluate the effectiveness and safety of remifentanil-based fast-track anesthesia for intraoperative device closure of atrial septal defects (ASDs).

Material/Methods

The clinical data of 152 pediatric patients who received intraoperative device closure of ASD in our hospital from January 2015 to December 2017 were retrospectively analyzed. Patients were divided into 2 groups: group F (remifentanil-based fast-track anesthesia group, n=72) and group C (fentanyl-based routine anesthesia group, n=80). The relevant data from 2 groups were collected and analyzed.

Results

No significant differences were found in the preoperative data or intraoperative hemodynamic index between these 2 groups. Group C was significantly inferior to group F regarding the duration of mechanical ventilation, length of intensive care unit (ICU) stay, length of hospital stay, and hospitalization expenses (P<0.05). In terms of postoperative complications, no death, third-degree atrioventricular block, occluder detachment, or residual leakage was reported in either group. The incidence of lung infections and bronchospasm was significantly higher in group C than in group F. There were no anesthetic-related complications.

Conclusions

The application of remifentanil-based fast-track anesthesia for intraoperative device closure of ASD is as effective and safe as fentanyl-based routine anesthesia. Moreover, remifentanil-based fast-track anesthesia has the advantages of shorter duration of mechanical ventilation, shorter length of hospital and ICU stay, fewer postoperative complications, and lower hospitalization expenses, and is therefore worthy of promotion in clinical practice.

Fast-Track Anaesthesia in Off-Pump Coronary Surgery: A Comparison of Normotensive and Hypertensive Patients

Objective

In this study, our aim was to investigate the efficacy and sufficiency of bispectral indeks (BIS) guided remifentanil-desflurane anaesthesia on intraoperative haemodynamic stability in both normotensive and hypertensive patients undergoing off-pump coronary artery bypass surgery.

Methods

Thirty adult, ASA I-III patients undergoing elective off-pump coronary surgery were included in the study. According to the presence of essential hypertension preoperatively, patients were divided into two groups. Haemodynamic parameters were recorded at 11 time points during the operation.

Results

There were no differences in the demographic data, heart rate and intraoperative and postoperative parameters between the groups. Arterial blood pressure and additional requirement of remifentanil were found to be significantly higher in the hypertensive group intraoperatively.

Conclusion

In patients undergoing off-pump coronary revascularisation surgery, intraoperative haemodynamic stabilisation with remifentanil-desflurane anaesthesia under BIS guidance was safely provided, but higher remifentanil doses were required in hypertensive patients.

Risk Factors for Delayed Extubation after Ventricular Septal Defect Closure: a Prospective Observational Study

Objective

The objective of our study was to determine the feasibility of early extubation and to identify the risk factors for delayed extubation in pediatric patients operated for ventricular septal defect closure.

Methods

A prospective, observational study was carried out at our Institute. This study involved consecutive 135 patients undergoing ventricular septal defect closure. Patients were extubated if feasible within six hours after surgery. Based on duration of extubation, patients were divided two groups: Group 1= extubation time ≤ 6 hours, Group 2= extubation time >6 hours.

Results

A total of 99 patients were in Group 1 and 36 patients in Group 2. Duration of ventilation was 4.4±0.9 hours in Group 1 and 25.9±24.9 hours in Group 2 (P<0.001). Univariate analysis showed that young age, low weight, low partial pressure of oxygen, trisomy 21, multiple ventricular septal defect, high vasoactive inotropic score, transient heart block and low cardiac output syndrome were associated with delayed extubation. However, regression analysis revealed that only trisomy 21 (OR: 0.248; 95%CI: 0.176-0.701; P=0.001), low cardiac output syndrome (OR: 0.291; 95%CI: 0.267-0.979; P=0.001), multiple ventricular septal defect (OR: 0.243; 95%CI: 0.147-0.606; P=0.002) and vasoactive inotropic score (OR: 0.174 95%CI: 0.002-0.062; P=0.039) are strongest predictors for delayed extubation.

Conclusion

Trisomy 21, low cardiac output syndrome, multiple ventricular septal defect and high vasoactive inotropic score are significant risk factors for delay in extubation. Age, weight, pulmonary artery hypertension, size of ventricular septal defect, aortic cross-clamp and cardiopulmonary bypass time did not affect early extubation.

Use of Provider Debriefing to Improve Fast-Track Extubation Rates Following Cardiac Surgery at an Academic Medical Center

When used in appropriate patient populations, fast-track extubation (FTE) anesthetic techniques and intensive care unit (ICU) protocols safely reduce intubation times, ICU length of stay, and resource utilization. The authors hypothesized that perioperative provider debriefing on success or failure of FTE would improve FTE success. This retrospective observational study included consecutive patients undergoing elective coronary artery bypass graft (CABG), valve, or combined CABG/valve surgery between February 2015 and May 2016 (N = 313). Throughout the intervention period, a briefing was distributed on postoperative day 1 to the anesthesiology providers responsible for operative care of the patient detailing success or failure of FTE and perioperative characteristics. The preintervention FTE success rate of 55.6% significantly improved to 72.8% in the intervention group ( P = .022). When combined with a continuous interdepartmental review process, provider debriefing improved FTE success. Perioperative provider debriefing requires minimal resources for implementation and can easily be replicated in other cardiac surgery centers.

Benefits of ultra-fast-track anesthesia in left ventricular assist device implantation: a retrospective, propensity score matched cohort study of a four-year single center experience

BACKGROUND

The use of left ventricular assist devices (LVADs) has gained significant importance for treatment of end-stage heart failure. Fast-track procedures are well established in cardiac surgery, whereas knowledge of their benefits after LVAD implantation is sparse. We hypothesized that ultra-fast-track anesthesia (UFTA) with in-theater extubation or at a maximum of 4 h. after surgery is feasible in Interagency Registry for Mechanically Assisted Circulatory Support (INTERMACS) level 3 and 4 patients and might prevent postoperative complications.

METHODS

From March, 2010 to March, 2012, 53 LVADs (50 Heart Mate II and 3 Heart Ware) were implanted in patients in our department. UFTA was successfully performed (LVAD _ultra ) in 13 patients. After propensity score matching, we compared the LVAD _ultra group with a matched group (LVAD _match ) receiving conventional anesthesia management.

RESULTS

Patients in the LVAD _ultra group had significantly lower incidences of pneumonia (p = 0.031), delirium (p = 0.031) and right ventricular failure (RVF) (p = 0.031). They showed a significantly higher cardiac index in the first 12 h. (p = 0.017); a significantly lower central venous pressure during the first 24 h. postoperatively (p = 0.005) and a significantly shorter intensive care unit (ICU) stay (p = 0.016). Kaplan-Meier analysis after four years of follow-up showed no significant difference in survival.

CONCLUSION

In this pilot study, we demonstrated the feasibility of ultra-fast-track anesthesia in LVAD implantation in selected patients with INTERMACS level 3-4. Patients had a lower incidence of postoperative complications, better hemodynamic performance, shorter length of ICU stay and lower incidence of RVF after UFTA. Prospective randomized investigations should examine the preservation of right ventricular function in larger numbers and identify appropriate selection criteria.

Examining Health Care Costs: Opportunities to Provide Value in the Intensive Care Unit

As health care costs threaten the economic stability of American society, increasing pressures to focus on value-based health care have led to the development of protocols for fast-track cardiac surgery and for delirium management. Critical care services can be led by anesthesiologists with the goal of improving ICU outcomes and at the same time decreasing the rising cost of ICU medicine.

Fast-Track Cardiac Anesthesia: Choice of Anesthetic Agents and Techniques

Fast-track cardiac anesthesia (FTCA) incorporates early tracheal extubation, decreased length of intensive care unit (ICU) and hospital stay, and (ideally) should avoid or reduce complications to safely achieve cost-savings. A growing body of evidence from randomized trials has identified many anesthetic interventions that can improve outcome after cardiac surgery. These include new short-acting hypnotic, opioid, and neuromuscular blocking drugs. An effective FTCA program requires the appropriate selection of suitable patients, a lowdose opioid anesthetic technique, early tracheal extubation, a short stay in the ICU, and coordinated perioperative care. It is also dependent on the avoidance of postoperative complications such as excessive bleeding, myocardial ischemia, low cardiac output state, arrhythmias, sepsis, and renal failure. These complications will have a much greater adverse effect on hospital length of stay and healthcare costs. A number of clinical trials have identified interventions that can reduce some of these complications. The adoption of effective treatments into clinical practice should improve the effectiveness of FTCA.

The Economics of Cardiac Surgery

Health care practitioners are under increasing pressure to identify and reduce the costs of their interventions. Cardiac surgical procedures have been studied extensively to determine which factors increase costs so the costs of future interventions can be reliably predicted. Knowing the cost components of surgical interventions identifies opportunities for increased efficiency and cost reduction. New technologic advances may initially defy cost reduction efforts until randomized controlled trials and cost analyses can be performed.

Postoperative Critical Care of the Adult Cardiac Surgical Patient. Part I: Routine Postoperative Care

OBJECTIVES

Cardiac surgery, including coronary artery bypass, cardiac valve, and aortic procedures, is among the most common surgical procedures performed in the United States. Successful outcomes after cardiac surgery depend on optimum postoperative critical care. The cardiac intensivist must have a comprehensive understanding of cardiopulmonary physiology and the sequelae of cardiopulmonary bypass. In this concise review, targeted at intensivists and surgeons, we discuss the routine management of the postoperative cardiac surgical patient.

DATA SOURCE AND SYNTHESIS

Narrative review of relevant English-language peer-reviewed medical literature.

CONCLUSIONS

Critical care of the cardiac surgical patient is a complex and dynamic endeavor. Adequate fluid resuscitation, appropriate inotropic support, attention to rewarming, and ventilator management are key components. Patient safety is enhanced by experienced personnel, a structured handover between the operating room and ICU teams, and appropriate transfusion strategies.

Cardiac intensive care for the neonate and child after cardiac surgery

PURPOSE OF REVIEW

The focus of postoperative care in the pediatric patient with congenital heart disease has become a reduction in length of stay and morbidity. This review will discuss strategies to achieve this goal and recent studies to support current practices.

RECENT FINDINGS

Most agree that prolongation of the length of stay following a cardiac surgery contributes to morbidity. Postoperative feeding difficulty, hyperglycemia, acute kidney injury, fluid overload, and prolonged intubation contribute significantly to length of stay.

SUMMARY

Postoperative care of the neonate and child following a cardiac surgery remains challenging with limited data to drive our practices. Patients remain at risk for significant morbidity, and future studies should focus on recognizing predictors of morbidity, prevention, and treatment.

High Thoracic Epidural in Cardiac Anesthesia

High thoracic epidural analgesia (HTEA) offers a distinctive opportunity to enhance postoperative recovery for the thoracic surgery patient. In the modern hospital setting with day of admission surgery, the logistics of insertion of the epidural catheter has become increasingly difficult. The greatest limitation to its use might be the believed increased risk of epidural hematoma associated with anticoagulation during cardiopulmonary bypass. The aim of this review is to give an overview of complications and effect on outcomes with focus on cardiac performance and postoperative glycemic control and kidney function. Patients with epidurals may have improved postoperative pulmonary function and shorter ventilation time, while impact on length of stay in the intensive care unit and hospital is not as evident. HTEA is effective in pain management, attenuates perioperative stress and seems to improve postoperative blood glucose control. Whether HTEA improves recovery and facilitates fast-track is still to be confirmed. With regard to serious postoperative complications, there is evidence of reduction in supraventricular arrhythmias and lower frequency of postoperative acute kidney injury and dialysis. There are some indications of lower short term mortality and frequency of postoperative myocardial infarctions, but only as a combined outcome. The present short-term mortality of 1% to 2% should be compared with the most pessimistic frequency of epidural hematoma being 1 in 4600 patients.

Safety profile of fast-track extubation in pediatric congenital heart disease surgery patients in a tertiary care hospital of a developing country: An observational prospective study

Background and Aims:

Early extubation after cardiac operations is an important aspect of fast-track cardiac anesthesia. In order to reduce or eliminate the adverse effects of prolonged ventilation in pediatric congenital heart disease (CHD) surgical patients, the concept of early extubation has been analyzed at our tertiary care hospital. The current study was carried out to record the data to validate the importance and safety of fast-track extubation (FTE) with evidence.

Materials and Methods:

A total of 71 patients, including male and female aged 6 months to 18 years belonging to risk adjustment for congenital heart surgery-1 category 1, 2, and 3 were included in this study. All patients were anesthetized with a standardized technique and surgery performed by the same surgeon. At the end of operation, the included patients were assessed for FTE and standard extubation criteria were used for decision making.

Results:

Of the total 71 patients included in the study, 26 patients (36.62%) were extubated in the operating room, 29 (40.85%) were extubated within 6 h of arrival in cardiovascular intensive care unit and 16 (22.54%) were unable to get extubated within 6 h due to multiple reasons. Hence, overall success rate was 77.47%. The reasons for delayed extubation were significant bleeding in 5 (31.3%) cases, hemodynamic instability (low cardiac output syndrome) in 4 (25%) cases, respiratory complication in 2 (12.5%), bleeding plus hemodynamic instability in 2 (12.5) cases, hemodynamic instability, and respiratory complication in 2 (12.5%) cases and triad of hemodynamic instability, bleeding and respiratory complication in 1 (6.5%) case. There was no reintubation in the FTE cases.

Conclusion:

On the basis of the current study results, it is recommended to use FTE in pediatric CHD surgical patients safely with multidisciplinary approach.

Clinical and economic impact of substituting dexmedetomidine for propofol due to a US drug shortage: examination of coronary artery bypass graft patients at an urban medical centre

BACKGROUND

Propofol has reduced healthcare costs in coronary artery bypass graft (CABG) surgery patients by decreasing post-operative duration of mechanical ventilation. However, the US shortage of propofol necessitated the use of alternative agents.

OBJECTIVE

This study sought to evaluate clinical and economic implications of substituting dexmedetomidine for propofol in patients undergoing CABG surgery.

METHODS

This was a retrospective cohort study. Patients undergoing isolated, elective CABG surgery and sedated with either propofol or dexmedetomidine during the study period were included. The cohorts were matched 1:1 based on important characteristics. The primary outcome was the number of patients achieving a post-operative duration of mechanical ventilation ≤6 h. Secondary outcomes were post-operative intensive care unit (ICU) length of stay (LOS) ≤48 h, total post-operative LOS ≤5 days, the need for adjunctive opioid therapy and associated cost savings. Variables recorded included patient demographics, co-morbid medical conditions, health risks, sedation drug doses, post-operative medical complications and sedation-related adverse events. Univariate and multivariate analyses were completed to examine the relationship between these covariates and post-operative LOS. The cost analysis consisted of examination of the net financial benefit (or cost) of choosing dexmedetomidine versus propofol in the study population, with utilisation observed in the study converted to costs using institutional data from the Premier database.

RESULTS

Eighty-four patients were included, with 42 patients per cohort. Mechanical ventilation duration ≤6 h was achieved in 24 (57.1 %) versus 7 (16.7 %) in the dexmedetomidine and propofol cohorts, respectively (p < 0.001). More patients treated with dexmedetomidine achieved ICU LOS ≤48 h (p < 0.05) and total hospital LOS ≤5 days (p < 0.05), as compared with the propofol group. Multivariate analysis revealed that having one or more post-operative medical complication was the most significant predictor of increased post-operative LOS, whereas choosing dexmedetomidine was also significant in terms of reduced post-operative LOS. The estimated net financial benefit of choosing dexmedetomidine versus propofol was US$2,613 per patient (year 2012 value).

CONCLUSIONS

Findings suggest that use of dexmedetomidine as an alternative to propofol for sedation of CABG patients post-operatively contributes to reduced mechanical ventilation time, ICU LOS and post-operative LOS. Higher drug costs resulting from the propofol shortage were offset by savings in post-operative room and board costs. Additional savings may be possible by preventing medical complications to the extent possible.

Fast-tracking in pediatric cardiac surgery--the current standing

Fast-tracking in cardiac surgery refers to the concept of early extubation, mobilization and hospital discharge in an effort to reduce costs and perioperative morbidity. With careful patient selection, fast-tracking can be performed in many patients undergoing surgery for congenital heart disease (CHD). In order to accomplish this safely, a multidisciplinary coordinated approach is necessary. This manuscript reviews currently used anesthetic techniques, patient selection, and available information about the safety and patient outcome associated with this approach.

[Fast track in cardiac surgery]

Fast track in cardiac surgery is not well defined. In the past early or immediate extubation was used as a marker. After cardiac surgery this parameter is not sufficient. In addition to cardiorespiratory stability, circulatory and haemostatic homeostasis are also required. Therefore the current Fast Track concept includes a period of intensive monitoring of the patient postoperatively to establish stability. Thereafter intensive care medicine should not be required. Evolving new surgical concepts in combination with appropriate anaesthesiologic management will lead to wide application of fast track cardiac surgery in the future.

Anesthesia in adult cardiac surgery without maintenance of muscle relaxants: a randomized clinical trial

There may be no need for muscle paralysis during cardiac surgery when adequate anesthesia is provided. We studied intra- and post-operative conditions during cardiac surgery without maintenance muscle relaxant therapy. Eighty adult patients who were candidates for elective coronary artery bypass graft surgery were randomly allocated into two groups. In the noMR or study group (noMR group; n = 40) only an intubation dose of cisatracurium (0.15 mg kg(-1)) was administrated, as opposed to the control group (MR group; n = 40), who had a continuous infusion added to the intubation dose. The anesthesia level was maintained at a Bispectral score of 40-50 using a propofol infusion. A remifentanil infusion was titrated to control patient hemodynamic response. During surgery, any minor (fine body or respiratory muscle movements) or major (coarse body movements or bucking/caught) movements were recorded. Postoperatively, analgesia was provided by remifentanil. The surgical condition was classified into three states: good (no movement), acceptable (minor movements), or poor (major movements). Anesthesia, surgery and postoperative characteristics were compared between the two groups. Statistical analysis was performed in only 78 patients (noMR = 38, MR = 40). The demographic and preoperative characteristics of the two groups were comparable. Intra-operative propofol consumption was the same, but significantly more remifentanil was used in the noMR group (p = 0.001). Post-operative characteristics and complication rates did not differ between the two groups. There were no movements in the MR group patients, while in the noMR group one patient had major movement and three had minor movements. We concluded that omitting maintenance muscle relaxants in adult cardiac surgery or eliminating residual muscle paralysis at the end of the surgery without improving early outcome can increase patient intra-operative movement risk.

A multicenter evaluation of safety of early extubation in liver transplant recipients

Small single-institutional studies performed prior to the introduction of organ allocation using the Model for End-Stage Liver Disease (MELD) suggest that early airway extubation of liver transplant recipients is a safe practice. We designed a multicenter study to examine adverse events associated with early extubation in patients selected for liver transplantation using MELD score. A total of 7 institutions extubated all patients meeting study criteria and reported adverse events that occurred within 72 hours following surgery. Adverse events were uncommon: occurring in only 7.7% of 391 patients studied. Most adverse events were pulmonary or surgically related. Pulmonary complications were usually minor, requiring only an increase in ambient oxygen concentration. The majority of surgical adverse events required additional surgery. Analysis of a limited set of perioperative variables suggest that blood transfusions and technical factors were associated with an increased risk of adverse events. In conclusion, while early extubation appears to be safe under specified circumstances, there are performance differences between institutions that remain to be explained.

Mild Hypercapnia After Uncomplicated Heart Surgery Is Not Associated With Hemodynamic Compromise

OBJECTIVE

The aim of this study was to examine the effects of small changes in PaCO(2) on hemodynamic parameters after uncomplicated heart surgery with cardiopulmonary bypass.

DESIGN

This was a prospective, randomized crossover study.

SETTING

A large academic medical center.

PARTICIPANTS

Twenty-four subjects who were scheduled for elective cardiac surgery were enrolled in this study.

INTERVENTIONS

Each subject underwent the normal procedures that are associated with cardiac surgery. General anesthesia, including muscle relaxation, were continued in the immediate postoperative period. Measured tidal volumes and minute ventilation were kept constant for the duration of the study. Target PaCO(2) concentrations of 30, 40, and 50 mmHg were achieved by adding varying amounts of exogenous CO(2) gas to the inhaled oxygen. Various measurements were made at each target PaCO(2), including cardiac index, mixed venous oxygen saturation, blood pressure, heart rate, and pulmonary artery pressure.

MEASUREMENTS AND MAIN RESULTS

Twenty-four patients were enrolled. Seven were withdrawn before commencement of the study. The cardiac index increased when the PaCO(2) was increased from 30 to 40 mmHg (p < 0.001) and remained unchanged between 40 and 50 mmHg. Mixed venous oxygen saturation increased (p < 0.001) with elevations in PaCO(2) up to 50 mmHg and decreased again when the PaCO(2) was returned to 30 mmHg. The blood pressure decreased (p < 0.001) with increasing PaCO(2). The pulmonary pressure increased (p < 0.001) with elevations in PaCO(2). No patient became hemodynamically unstable or had any arrhythmias.

CONCLUSION

The findings of this study suggest that unless there is a specific contraindication to mild hypercapnia, such as pulmonary hypertension or hemodynamic instability, concerns about mild respiratory acidosis should not prevent weaning of sedation and mechanical ventilation after uncomplicated heart surgery.

Coronary artery bypass graft surgery—care globalization: The impact of national care on fatal and nonfatal outcome

OBJECTIVE

In an international, prospective, observational study, we contrasted adverse vascular outcomes among four countries and then assessed practice pattern differences that may have contributed to these outcomes.

METHODS

A total of 5065 patients undergoing coronary artery bypass graft surgery were analyzed at 70 international medical centers, and from this pool, 3180 patients from the 4 highest enrolling countries were selected. Fatal and nonfatal postoperative ischemic complications related to the heart, brain, kidney, and gastrointestinal tract were assessed by blinded investigators.

RESULTS

In-hospital mortality was 1.5% (9/619) in the United Kingdom, 2.0% (9/444) in Canada, 2.7% (34/1283) in the United States, and 3.8% (32/834) in Germany (P = .03). The rates of the composite outcome (morbidity and mortality) were 12% in the United Kingdom, 16% in Canada, 18% in the United States, and 24% in Germany (P < .001). After adjustment for difference in case-mix (using the European System for Cardiac Operative Risk Evaluation) and practice, country was not an independent predictor for mortality. However, there was an independent effect of country on composite outcome. The practices that were associated with adverse outcomes were the intraoperative use of aprotinin, intraoperative transfusion of fresh-frozen plasma or platelets, lack of use of early postoperative aspirin, and use of postoperative heparin.

CONCLUSIONS

Significant between-country differences in perioperative outcome exist and appear to be related to hematologic practices, including administration of antifibrinolytics, fresh-frozen plasma, platelets, heparin, and aspirin. Understanding the mechanisms for these observations and selection of practices associated with improved outcomes may result in significant patient benefit.

Fast-track failure after cardiac surgery: Development of a prediction model*

OBJECTIVE

Risk factors for unsuccessful fast-tracking of cardiac surgery patients have not been collectively defined in the literature. The aim of this study was to determine risk factors for fast-track failure and incorporate them into a predictive fast-track failure score.

DESIGN

Prospective observational study.

SETTING

Cardiothoracic Department of St Mary's Hospital, London.

PATIENTS

Data were collected from April 2003 to April 2005 including 1,084 patients undergoing heart surgery who were admitted into the fast-track unit.

INTERVENTIONS

Multifactorial logistic regression was used to develop a propensity score for estimating the likelihood of fast-track failure.

MEASUREMENTS AND MAIN RESULTS

One hundred and sixty-nine patients failed fast-track management (15.6%). Independent predictors for fast-track failure were impaired left ventricular function with or without recent acute coronary syndrome (odds ratios 2.89 and 1.65 respectively), re-do operation (one, two, or more vs. none, odds ratio 1.75, 7.98), extracardiac arteriopathy (odds ratio 2.63), preoperative intra-aortic balloon pump (odds ratio 3.09), raised serum creatinine in micromol/L (120-150, >150 vs. <120, odds ratio 1.57, 11.24), and nonelective (odds ratio 3.43) and complex surgery (odds ratio 2.70). Model validation showed very good discrimination (area under the curve = 0.815) and calibration (ĉ statistic = 8.527, p = .129).

CONCLUSIONS

The fast-track failure score incorporates several preoperative factors and has been successfully internally validated; after undergoing external validation and possible recalibration it may be used as a tool to facilitate planning and flow of cardiac surgery patients, based on the predicted probability of failure. Application of this score may limit fast-track failure rates and help to reduce morbidity and cost.

Octogenarians Undergoing Coronary Artery Bypass Graft Surgery: Resource Utilization, Postoperative Mortality, and Morbidity

OBJECTIVE

The purpose of the present study was to examine resource utilization in octogenarians undergoing coronary artery bypass grafting (CABG) and compare it with usage in their younger cohorts at a tertiary care heart center. The resources examined were time to extubation, packed red blood cell transfusions, intensive care unit (ICU) length of stay (LOS), and preoperative and postoperative LOS. The study also examined differences in postoperative morbidity and mortality.

DESIGN

Retrospective hospital follow-up study of consecutive patients undergoing CABG using a prospectively designed database.

SETTING

University teaching tertiary care referral center for cardiac surgery.

PARTICIPANTS

Seventeen hundred forty-six male and female patients undergoing CABG surgery, including 155 octogenarians and 1591 patients younger than 80 years.

INTERVENTIONS

None.

MEASUREMENTS AND MAIN RESULTS

Demographic, mortality, morbidity, and resource utilization data were collected from the records of patients undergoing CABG at the authors' institution over 3 years. There were 1746 patients: 155 octogenarians and 1591 nonoctogenarians. Octogenarians had a significantly higher incidence of preoperative stroke, peripheral vascular disease, chronic obstructive lung disease, congestive heart failure, and left main disease. They weighed significantly less, and had lower preoperative and postoperative hematocrit. There was a significantly higher percentage of women in the octogenarian group. Mean time from the end of surgery to endotracheal extubation was 9.3 hours for octogenarians and 6.3 hours for their younger cohorts (p < 0.001). Blood transfusion was required in 88.4% of octogenarians compared with 58.6% of nonoctogenarians (p < 0.001). Mean ICU LOS was 1.9 days for octogenarians and 1.4 days for nonoctogenarians (p < 0.001). Mean postoperative LOS was 8.7 days for octogenarians and 5.8 days for nonoctogenarians (p < 0.001). Clinical and demographic variables were correlated with age 80 years or older. Multivariate linear and logistic regression models were constructed to show the combined effects of age and comorbid conditions on outcomes. Octogenarians had a significantly higher incidence of postoperative renal failure and neurologic complications. The 30-day mortality rate was 9.0% for the octogenarian group v 1.2% for the younger group (p < 0.001). Age 80 years or older was significantly associated with outcome, and was an independent predictor of increased resource utilization and postoperative mortality and morbidity.

CONCLUSIONS

The results demonstrated that octogenarians undergoing CABG required increased resource utilization and had significantly higher morbidity, with increased incidence of postoperative renal failure, neurologic complications, and 30- day mortality. Age 80 years or older was an independent predictor of increased resource utilization, postoperative morbidity, and mortality.

Resource utilization in on- and off-pump coronary artery surgery: Factors influencing postoperative length of stay—an experience of 1,746 consecutive patients undergoing fast-track cardiac anesthesia

OBJECTIVE

The purpose of the present investigation was to examine factors influencing resource utilization in patients undergoing on-pump coronary artery bypass graft and off-pump coronary artery bypass (OPCAB) graft surgery at a major university hospital. The resources examined were time to extubation, packed red blood cell (PRBC) transfusion, intensive care length of stay (ICULOS), preoperative and postoperative length of stay (PLOS), and total length of stay (LOS).

DESIGN

Observational study of consecutive patients undergoing on- and off-pump coronary artery bypass surgery.

SETTING

Tertiary care cardiac referral center.

PARTICIPANTS

One thousand seven hundred forty-six consecutive male and female patients undergoing primary coronary artery bypass graft (CABG) surgery over a period of 3 years (1999-2001). Eight hundred eighty-one patients underwent CABG with pump, and 865 patients underwent off-pump coronary artery bypass (OPCAB) surgery.

INTERVENTIONS

None.

MEASUREMENTS AND MAIN RESULTS

The mean time to extubation after surgery was 7.4 hours for on-pump patients and 5.8 hours for the OPCAB group (p<or=0.001); 73.7% of patients on pump received PRBC transfusion as compared with 48.6% of the OPCAB group (p<or=0.001). The mean ICULOS for the on-pump group was 1.6 days and 1.4 days for the OPCAB group (p=0.006). PLOS was 6.5 days for the on-pump group and 5.6 days for the OPCAB group (p<or=0.001). Mean total LOS was 9.7 days for the on-pump group and 8.8 days for the OPCAB group (p<or=0.001). PLOS is correlated with several clinical and demographic ariables. Linear and logistic regression models were used to assess the effects of on/off pump on PLOS. Use of pump is significantly correlated with increased PLOS (p<or=0.001, Kendalls correlation), and pump use is strongly associated with transfusion (odds ratio=2.95, p<or=0.001), which in turn is a determinant of PLOS. There were no significant differences between the on- and off-pump groups in the incidence of postoperative complications except for bleeding requiring reexploration and ventilatory support for more than 72 hours. Incidence of bleeding was 3.3% in the on-pump group and 1.7% in the OPCAB group (p=0.038). In the on-pump group, 3% of patients required >72 hours to postoperative tracheal extubation compared with 1.5% in the OPCAB group (p=0.041). Hospital mortality was 2.7% for the on-pump group and 1.0% for the OPCAB group (p=0.010).

CONCLUSION

The authors found that patients undergoing on-pump CABG have significantly longer time to tracheal extubation, increased blood use, longer ICULOS, PLOS, and total LOS and higher in-hospital mortality, which would translate into significant differences in the expenses associated with these 2 surgical approaches to coronary surgery.