Perioperative Hemodynamics in Free Flap Breast Reconstruction: Incidence, Predictors, and Management of Tachycardia

Intraoperative Methadone: A New Enhanced Recovery After Surgery Pathway for Deep Inferior Epigastric Perforator Flap Breast Reconstruction

BACKGROUND

Inadequate postoperative pain relief places patients at risk for increased morbidity, including surgical complications and chronic postoperative pain. Previous studies have shown that just one dose of methadone can achieve better analgesia than multiple doses of short-acting opioids. This study aims to evaluate the effectiveness of our Enhanced Recovery After Surgery (ERAS) protocol for deep inferior epigastric perforator flap breast reconstruction centered around a single weight-based intraoperative dose of methadone.

METHODS

The authors retrospectively reviewed patients from October 2020 to March 2021 to establish a historical control cohort (n = 29). The ERAS protocol was implemented in April 2021, and patients were prospectively enrolled in the ERAS cohort from April 2021 to January 2022 (n = 54). Primary outcomes compared between the ERAS and historical cohorts using univariate analysis were length of stay, postoperative opioid consumption, pain scores, heart rates, and incidence of tachycardia.

RESULTS

There was no difference in the length of stay between our ERAS and non-ERAS cohorts (P = 0.68). Patients in the ERAS pathway had significantly less opioid consumption at 12 hours postoperatively (P < 0.001), 24 hours postoperatively (P < 0.001), and throughout the entire admission (P = 0.002). Pain scores were significantly lower in the ERAS cohort at 24 hours postoperatively (P = 0.021) and throughout admission (P = 0.0051). The ERAS cohort had significantly lower heart rates at 12 hours postoperatively (P = 0.0014), 24 hours postoperatively (P < 0.001), and throughout admission (P < 0.001). The incidence of tachycardia was also significantly lower in the ERAS cohort (P = 0.029).

CONCLUSIONS

This preliminary data after newly instituting our ERAS protocol with a single dose of intraoperative methadone significantly reduced postoperative opioid analgesic usage, pain scores, heart rates, and incidence of tachycardia. This pilot study demonstrates that methadone has the potential to be used for patients undergoing plastic surgery procedures, both inpatient and ambulatory, to decrease postoperative pain, opioid use, and increase overall patient comfort and satisfaction.

Flying high?-Exploring the effect of red bull on blood pressure after microsurgical breast reconstruction in a randomized controlled trial

BACKGROUND

A sufficiently high blood pressure (BP) is essential for flap perfusion after microsurgical breast reconstruction. However, postoperative hypotension is common after these procedures. Perioperative volume overload may increase flap-related complications, and postoperative vasopressor use may be limited depending on institutions. Red Bull has been shown to increase BP in several studies. We aimed to evaluate the effect of Red Bull on perfusion-related variables after microsurgical breast reconstruction.

METHODS

We conducted a multicenter, prospective, randomized controlled trial. Female patients undergoing unilateral microsurgical breast reconstruction from June 2020 to October 2022 were randomly assigned to the intervention or control groups. The intervention group received 250 ml of Red Bull 2 h after surgery and twice on postoperative day (POD) 1. The control group received 250 ml still water at the respective intervals. BP was measured using a 24-hour monitoring device. Vasopressor use, fluid balance, and flap outcomes were compared.

RESULTS

One hundred patients were included in the study. Both groups were comparable concerning age, body mass index, and caffeine consumption. Mean arterial and diastolic BP were significantly higher in the Red Bull group after the second drink in the morning of POD1 (p-value = 0.03 and 0.03, respectively). Vasopressor use was similar, with a tendency for less postoperative etilefrine in the Red Bull group (p-value = 0.08). No flap loss was observed.

CONCLUSIONS

We observed increased mean arterial and diastolic BP in the Red Bull group after the second drink. Red Bull may be a useful adjunct after microsurgical breast reconstruction.

LEVEL OF EVIDENCE

I, therapeutic.

Efficacy of ultrasound guided superior laryngeal nerve block on sedation for delayed extubation in maxillofacial surgery with free flap reconstruction

OBJECTIVE

Superior laryngeal nerve block (SLNB) is a regional anesthesia technique for addressing airway response. However, SLNB on the efficacy of sedation in patients with delayed extubation is unknown, particularly for maxillofacial surgery (MS). The aim of the study was to assess whether ultrasound guided (UG) SLNB reduces the incidence of moderate to severe cough for delayed extubation in MS with free flap reconstruction.

METHODS

60 patients were randomly assigned to the GEA group (control group) and the SLNB group (UG-SLNB postoperatively, study group). During the initial two postoperative hours, the incidence of moderate and severe cough, agitation, and the number of patients requiring rescue propofol and flurbiprofen were recorded. Additionally, the time spent under the target level of sedation, postoperative hemodynamics, and the total does of propofol during the postoperative 24 h were recorded.

RESULTS

The data showed the SLNB group had a significantly lower incidence of moderate to severe cough and agitation (p < 0.05), and a longer sedation time (p < 0.05). The number of patients required rescue propofol and flurbiprofen, as well as the hemodynamic changes, were significantly different between the two groups (p < 0.05).

CONCLUSION

The use of UG-SLNB is associated with reduced incidence of postoperative cough. Moreover, SLNB can enhance the efficacy of postoperative sedation with need of fewer agents postoperatively.

CLINICAL TRIAL REGISTRATION

ChiCTR2000039982.

Postoperative Tachycardia in Deep Inferior Epigastric Perforator Flap Breast Reconstruction: Is It a Reason to Worry?

BACKGROUND

 Many patients who undergo free flap breast reconstruction develop postoperative hemodynamic changes, most noticeably, tachycardia. As there is currently no consensus on whether this tachycardia leads to clinically significant morbidity, it can trigger physician alarm and lead to extensive work-up. In this study, we aim to evaluate the predictors, evaluation, and outcomes associated with postoperative tachycardia in deep inferior epigastric perforator (DIEP) flap patients.

METHODS

 A retrospective review of DIEP flap patients between 2011 and 2020 was performed. Variables examined included demographics, preoperative laboratories and heart rate (HR), and intraoperative factors. Work-up of postoperative tachycardia and adverse postoperative events was noted. Tachycardia was defined as persistent HR of 100 beats/min or more for at least 12 consecutive hours following surgery. Tachycardic patients were compared with non-tachycardic patients using regression analysis.

RESULTS

 In total, 249 patients (439 flaps) were included in this study. Sixty-one patients (24.9%) developed tachycardia postoperatively. Regression analysis revealed that preoperative HR (p = 0.002) and flap weight (p = 0.037) predicted the development of tachycardia. While tachycardic patients were significantly more likely to undergo additional imaging and specialty consultations (p <0.05), they were not at higher risk for most postoperative complications, with the exception of delayed abdominal donor-site healing.

CONCLUSION

 A significant number of DIEP flap patients can be expected to develop persistent tachycardia postoperatively. Isolated tachycardia should be considered a relatively benign finding that does not warrant extensive work-up or prolonged inpatient monitoring. Having the ability to predict tachycardia using preoperative HR and flap weight arms plastic surgeons with the confidence to limit costly work-up.

A UK consensus statement on thromboprophylaxis for autologous breast reconstruction ,

Microsurgical breast reconstruction accounts for 22% of breast reconstructions in the UK. Despite thromboprophylaxis, venous thromboembolism (VTE) occurs in up to 4% of cases. Using a Delphi process, this study established a UK consensus on VTE prophylaxis strategy, for patients undergoing autologous breast reconstruction using free-tissue transfer. It captured geographically divergent views, producing a guide that reflected the peer opinion and current evidence base.

METHODS

Consensus was ascertained using a structured Delphi process. A specialist from each of the UK's 12 regions was invited to the expert panel. Commitment to three to four rounds of questions was sought at enrollment. Surveys were distributed electronically. An initial qualitative free-text survey was distributed to identify likely lines of consensus and dissensus. Each panelist was provided with full-text versions of key papers on the topic. Initial free-text responses were analyzed to develop a set of structured quantitative statements, which were refined via a second survey as a consensus was approached.

RESULTS

The panel comprised 18 specialists: plastic surgeons and thrombosis experts from across the UK. Each specialist completed three rounds of surveys. Together, these plastic surgeons reported having performed more than 570 microsurgical breast reconstructions in the UK in 2019. A consensus was reached on 27 statements, detailing the assessment and delivery of VTE prophylaxis.

CONCLUSION

To our knowledge, this is the first study to collate current practice, expert opinion from across the UK, and a literature review. The output was a practical guide for VTE prophylaxis for microsurgical breast reconstruction in any UK microsurgical breast reconstruction unit.

Impact of Blood Transfusion in Free Flap Breast Reconstruction Using Propensity Score Matching

BACKGROUND

 Microvascular thrombosis has been associated with cytokine release and inflammatory syndromes which can occur as a result of blood transfusions. This phenomenon could potentially lead to complications in breast free flap reconstruction. The aim of this study was to evaluate the impact of perioperative blood transfusion in free flap breast reconstruction using large population analysis.

METHODS

 The American College of Surgeons National Quality Improvement Program database was queried for delayed free flap breast reconstructions performed in 2016. The study population was divided based on perioperative blood transfusion within 24 hours of the start of the operation. Propensity score matching analysis was used to ensure homogeneity between the two study groups. Primary outcome was unplanned return to the operating room (OR) within 30 days. Secondary outcomes were readmission and complications.

RESULTS

 A total of 1,256 patients were identified. Out of those, 91 patients received a perioperative blood transfusion. All the patients received only one unit of PRBC within the first 24 hours. Those patients were matched with similar patients who did not receive a transfusion on a ratio of 1:3 (273 patients). Patients who received a transfusion had a significantly higher incidence of reoperation (42 vs. 10%, p < 0.001). Patients who received a transfusion were more likely to return to the OR after 48 hours from the initial operation (13 vs. 5%, p = 0.001). All returns to the OR were due to flap-related complications. Perioperative blood transfusion increased the incidence of wound dehiscence (9 vs. 2%, p = 0.041) but had no protective effect on the development of other postoperative complications.

CONCLUSION

 Perioperative blood transfusion in free flap breast reconstruction is associated with an increased probability of flap-related complications and subsequent return to the OR without decreasing the probability of developing other systemic postoperative complications.

Vagal Stimulation as Result of Pleural Stretch Secondary to Retraction during Internal Mammary Anastomosis

Supplemental Digital Content is available in the text.

Efficacy of the postoperative management after microsurgical free tissue transfer

INTRODUCTION

The physical and medical postoperative measures after free flap reconstruction vary substantially between surgical units. The objective of this review was to identify the postoperative measures which proved a significant positive effect on free flap survival.

METHOD

A review was conducted in the MEDLINE database on the English and French literature.

RESULTS AND DISCUSSION

Twenty-eight articles were retained. A meta-analysis of 4984 patients who were given antithrombotics (viz. antiplatelets and anticoagulants) postoperatively found that these treatments were of no significant benefit to free flap survival and increased the risk of postoperative hematoma. Postoperative transfusions did not favor free flap survival and were associated with a higher incidence of medical complications. Preoperative anemia was a risk factor for free flap failure. Blood pressure control, vasodilators, antioxidants, corticotherapy, oxygen therapy, and prolonged immobilization were of no proven benefit.

CONCLUSION

No postoperative therapy, whether drug-based or not, has been shown to have a significant positive effect on free flap survival.

Restrictive use of perioperative blood transfusion does not increase complication rates in microvascular breast reconstruction

INTRODUCTION

With increasing appreciation of the possible adverse effects of peri-operative blood transfusion, restrictive policies regarding use of blood products have been adopted in many surgical specialties. Although microvascular breast reconstruction has become a routine procedure, high peri-operative transfusion rates continue to be reported in the literature. In this study we examine the impact of our restrictive approach on blood transfusion rates and postoperative complications in patients undergoing microvascular blood transfusion.

METHODS

A retrospective review of patients undergoing microvascular breast reconstruction with abdominal flaps at a single institution was performed. Patient age and body mass index as well as type, timing and laterality of reconstruction was recorded. Pre-operative and post-operative hemoglobin and hematocrit were recorded. Peri-operative blood transfusion rates were calculated. Post-operative complication rates were compared between patients with higher and lower post-operative hemoglobin levels.

RESULTS

Five hundred and twelve patients were included in this study. The peri-operative transfusion rate was 0.98% in this series. There was no significant difference between transfusion rates in unilateral and bilateral reconstructions (0.68 vs 1.36% p = 0.08) or immediate and delayed reconstructions (1.02 vs 0.51% p = 0.72 and 1.01 vs 1.60% p = 0.09 for unilateral and bilateral respectively). Lower post-operative hemoglobin levels were not associated with increased flap related, surgical or medical complications rates.

CONCLUSION

A restrictive approach to peri-operative blood transfusion can be safely adopted in microvascular breast reconstruction without compromising flap viability or overall complication rates.

Tachycardia in breast reconstructive microsurgery: Affirmation of the IMA tachycardia syndrome

INTRODUCTION

The internal mammary vessels are frequently chosen as recipient vessels for breast free flap reconstruction. We have noticed that when using the internal mammary recipients that these patients have a propensity for tachycardia that was not previously observed. Our aim was to investigate the factors related to perioperative tachycardia in the microsurgical breast reconstruction population and to address whether use of the internal mammary system is a causative factor in tachycardia.

METHODS

A retrospective chart review was conducted to identify patients who underwent abdominal-based microvascular breast reconstruction at the Washington University School of Medicine between 2002 and 2012 to identify the presence of tachycardia. After application of exclusion criteria, 76 microvascular abdominal-based free flap reconstructions were identified. The internal mammary (IM) TRAM group (n = 24) and the thoracodorsal (TD) TRAM group (n = 52) were compared. A binomial logistic regression was performed with the presence of tachycardia as the dependent variable.

RESULTS

There was a higher incidence of tachycardia in the IM TRAM group when compared to the TD TRAM group (p = 0.004). The variables predictive of tachycardia in our logistic regression model were IMA recipient (p = 0.04), need for transfusion (p = 0.03), and presence of fever (p = 0.01).

CONCLUSION

Our study reaffirms that there are several factors that are predictive of tachycardia in the setting of microvascular breast reconstruction. The IMA syndrome should be a recognized cause of tachycardia as using these recipient vessels are shown to be predictive of postoperative tachycardia as shown in our study.

Blood loss and transfusion rates in DIEP flap breast reconstruction. Introducing a new predictor

BACKGROUND

The popularity of the DIEP flap has increased over the last decade. However, there is little information regarding the transfusion rates of this complex procedure. The current study reports the transfusion rates in patients who underwent DIEP flap reconstruction in our unit with an attempt to correlate significant blood loss with potential predictors such as the abdominal flap weight.

METHODS-MATERIAL

A retrospective review of 131 patients who underwent DIEP reconstruction was performed. Patients' characteristics, risk factors, incidence of blood transfusions, Hb drop and complications were reviewed. For statistical analysis the two-tailed Student t-test, chi-squared significance test and multiple regression model were used.

RESULTS

12 patients (9.1%) were transfused compared to 80.3% and 18.8% described in the literature. Definite association was found between the presence of a complication and transfusion. No correlation was found between age, obesity, chemotherapy and/or radiotherapy or tamoxifen treatment and blood loss. However, operation duration, complications and weight all found to have significant correlation. On average, every additional hour of surgery adds 0.25 g of Hb drop; the presence of a complication adds 0.45 g of Hb drop, and every extra gram of tissue removed from the abdomen adds an extra 0.001 g of Hb drop.

CONCLUSION

The different transfusion rates published reflect variations in surgical strategies, different operative technical details but mostly transfusion protocols applied in each unit. As a correlation with complications was found, it is quite important to identify predictors for significant blood loss to optimise the operation outcome which in our study are additional time of surgery, the presence of complication and increased flap weight.