Histopathologic Study of the Effects of Surgically Applied Cryoanalgesia on Intercostal Nerves in a Live Porcine Model.

Background/Objectives: The aim of this study was to establish a histologic baseline for cryoanalgesia of 2 min duration and evaluate the effects of different freeze durations. Methods: A porcine model was used in which the application of bilateral cryoanalgesia from intercostal spaces T3-T7 was completed via partial median sternotomy. The animals were kept alive for 7 days and the ribcages were sent to a specialized center for histopathologic analysis of the freezing injury. Results: Forty freezing lesions were completed and analyzed histologically. Thirty-eight (95%) of the cryo-lesions presented 100% nerve fiber degeneration at or distal to the ablation site, with preservation of the perineural connective tissue, as intended. The two unaffected nerves were found to be physically located outside of the freezing area. Conclusions: The complete axonal degeneration with preservation of the perineural tissue opens the possibility to shorter freezing times than the recommended 2 min. Visualization of the nerve and positioning of the probe is important in ensuring the proper effect on the nerve. This histologic analysis confirms the process triggered by cryoanalgesia that, until now, had only been assumed.

Opioid Dependence After Lung Cancer Resection: Institutional Analysis of State Prescription Drug Database.

BACKGROUND: The national opioid epidemic is a public health crisis. Thoracic surgery has also been associated with high incidence of new persistent opioid use. Our purpose was to describe the incidence and predictors of opioid use after lung cancer resection. METHODS: Retrospective review of lung cancer resections from 2015 to 2018 was performed using the Ohio Automated Rx Reporting System. Opioid dosing was recorded as milligram morphine equivalents (MME). Patients were stratified by preoperative opioid use. Chronic preoperative opioid users (opioid dependent) filled > 120 days supply of opioid pain medication in the 12 months prior to surgery; intermittent opioid users filled < 120 days. Chronic postoperative opioid users continued monthly use after 180 days postoperatively. RESULTS: 137 patients underwent resection. 16.1% (n = 22) were opioid dependent preoperatively, 29.2% (n = 40) were intermittent opioid users, and 54.7% (n = 75) were opioid naïve. Opioid dependent patients had higher daily inpatient opioid use compared to intermittent users and opioid naïve (43[30.0-118.1] MME vs 17.9[3.5-48.8] MME vs 8.8[2.1-25.0] MME, p < 0.001). Twenty-six percent (n = 35) of all patients were opioid users beyond 180 days postoperatively. Variables associated with opioid use > 180 days were: chronic preoperative opioid use (OR 23.8, p < 0.01), daily inpatient opioid requirement (1.02, p < 0.01), and neoadjuvant chemotherapy (28.2, p < 0.01). CONCLUSIONS: A quarter of patients are opioid dependent after lung cancer resection. This is due to both preexisting and new persistent opioid use. Improved strategies are needed to prevent chronic pain and opioid dependence after lung cancer resection.

Radiotracer localization of nonpalpable pulmonary nodules: A single-center experience.

OBJECTIVE: Multiple localization techniques to facilitate intraoperative identification of small or nonsolid pulmonary nodules have been developed. Radiotracer localization using technetium-labeled macroaggregated albumin has been our preferred localization method since 2009. We report our experience, including technical pitfalls and modifications, of our initial 77 patients who underwent this technique. METHODS: All patients undergoing preoperative radiotracer localization were identified from a prospective database. Medical records were retrospectively reviewed for patient demographic characteristics, nodule characteristics, procedure details, pathologic data, and outcomes. RESULTS: Seventy-seven patients underwent localization of 79 pulmonary nodules. Radiotracer localization had an overall success rate of 95%; however, 2 patients required a second localization procedure on the same day. Most failures occurred in nodules that were < 5 mm from the pleural surface, resulting in pleural spillage. Seventy-three patients underwent a diagnostic wedge resection, with 2 of these patients requiring 2 wedge resections. In 2 patients, the nodules were successfully localized; however, they were too deep for wedge resection and required anatomic resection. Two patients did not undergo resection. One patient developed pleural spillage and hemothorax and due to subsequent comorbidities, was never rescheduled. The second patient did not tolerate single-lung ventilation. The majority (86%) of lesions were malignant. Median length of stay was 2 days (range, 1-15 days). There was no 30-day mortality. The only morbidity was a prolonged air leak (>5 days) in 5 patients. CONCLUSIONS: Radiotracer localization is a simple and effective technique for intraoperative identification of small pulmonary nodules.

Empyema from Obstructing Lung Cancer.

Pleural collections on the side of an obstructing bronchial cancer pose a particular challenge. All efforts should be placed into determining whether the collection is malignant or para-malignant with its significant implications on cancer staging. This article discusses various diagnostic modalities and therapeutic interventions needed for the optimal management of patients presenting with this situation. The order of interventions is dictated by the individual circumstances that patients present with, often requiring the pleural interventions to take place ahead of the bronchial obstruction management.

Epidural versus subpleural analgesia for pulmonary resections: a comparison of morbidities.

There are several methods to mitigate the pain that results from thoracic surgery. All of them may be associated with complications. We analyzed the morbidities associated with epidural and subpleural catheter analgesia in patients undergoing pulmonary resections for lung cancer. We conducted a retrospective review of our prospective lung cancer outcomes database for all patients undergoing lobectomy for lung cancer through a thoracotomy or thoracoscopy. All patients had either an epidural or subpleural catheter placed for pain control. One hundred twenty-nine patients met the inclusion criteria. Patients were stratified based on age and pain management technique and the 30-day outcomes were examined. Ninety-three patients had epidural catheters placed and 36 received subpleural catheters. Baseline demographics were similar except for two variables; the subpleural catheter group had a larger proportion of thoracoscopic surgery and more pack-years smoked. Patients in the epidural group were more likely to experience postoperative pruritus and had longer intensive care unit stays but were less likely to use a patient-controlled anesthesia pump. Patients in the subpleural group were more likely to develop intestinal complications. When a subset analysis was done by age (younger than 70 vs 70 years or older), there were no significant differences in postoperative outcomes in the older group. The younger cohort had more pruritus and longer intensive care unit stays in the epidural group. The differences between subpleural and epidural catheters are minimal across all ages and nonexistent for geriatric patients. Thus, the choice of pain management should be determined by individual patient characteristics and risk factors rather than based on age alone.

Methotrexate-induced pleuropericarditis and eosinophilic pleural effusion.

A 41-year-old man developed widespread skin rash involving his knees, elbows, and gluteal region. He received methotrexate for approximately 1 month and later developed dyspnea and a left-sided eosinophilic pleural effusion. He was transiently placed on oral steroids. Subsequent skin biopsy showed psoriatric arthritis. Methotrexate was restarted and 8 weeks into the treatment, he developed dyspnea, a hemorrhagic pericardial effusion, and a right-sided eosinophilic pleural effusion. Methotrexate was discontinued, but patient developed dyspnea with a recurrent right eosinophilic pleural effusion, 2 weeks later. Pleural biopsies were obtained through medical pleuroscopy that revealed mild chronic inflammation with prominent eosinophils and no evidence for malignancy. Oral steroids were restarted with significant improvement in his symptoms.

Video-assisted thoracoscopic surgery for acute thoracic trauma.

BACKGROUND: Operative intervention for thoracic trauma typically requires thoracotomy. We hypothesized that thoracoscopy may be safely and effectively utilized for the acute management of thoracic injuries. MATERIALS AND METHODS: The Trauma Registry of a Level I trauma center was queried from 1999 through 2010 for all video-assisted thoracic procedures within 24 h of admission. Data collected included initial vital signs, operative indication, intraoperative course, and postoperative outcome. RESULTS: Twenty-three patients met inclusion criteria: 3 (13%) following blunt injury and 20 (87%) after penetrating trauma. Indications for urgent thoracoscopy included diaphragmatic/esophageal injury, retained hemothorax, ongoing hemorrhage, and open/persistent pneumothorax. No conversions to thoracotomy were required and no patient required re-operation. Mean postoperative chest tube duration was 2.9 days and mean length of stay was 5.6 days. CONCLUSION: Video-assisted thoracoscopic surgery is safe and effective for managing thoracic trauma in hemodynamically stable patients within the first 24 h post-injury.

Predictors of conversion to thoracotomy for video-assisted thoracoscopic lobectomy: a retrospective analysis and the influence of computed tomography-based calcification assessment.

OBJECTIVE: Conversion to an open thoracotomy during video-assisted thoracoscopic surgery lobectomy is reported to occur in up to 23% of cases and can be associated with increased morbidity. We developed a preoperative computed tomography calcification score based on anatomic location and extent of calcifications to evaluate the ability to predict video-assisted thoracoscopic surgery conversion. METHODS: Patients undergoing planned video-assisted thoracoscopic surgery lobectomy between 2003 and 2009 were identified. Baseline demographics, comorbidities, operative data, and postoperative outcomes were reviewed. Preoperative chest computed tomography scans were examined by an attending thoracic surgeon. Calcifications were scored from 0 (none) to 6 (major hilar calcifications at the resection bronchus). Preoperative patient and tumor characteristics and the calcification score were analyzed for their ability to predict conversion. We then compared outcomes among patients undergoing video-assisted thoracoscopic surgery, converted video-assisted thoracoscopic surgery, and planned open thoracotomy. RESULTS: Of the 193 patients undergoing planned video-assisted thoracoscopic surgery lobectomy, 148 (77%) had a completed video-assisted thoracoscopic surgery lobectomy, and 45 (23%) underwent conversion to thoracotomy. The calcification score was found to independently predict video-assisted thoracoscopic surgery conversion. Patients who were converted to a thoracotomy had significantly higher 30-day mortality, more atrial arrhythmias, increased blood loss, longer operative time, and increased length of stay compared with those who underwent completed video-assisted thoracoscopic surgery lobectomy and longer length of stay compared with those undergoing planned open lobectomy. CONCLUSIONS: Calcification score based on the location and degree of calcifications can predict the increased likelihood of video-assisted thoracoscopic surgery conversion. This scoring system could be one element used to choose the approach for a lobectomy, especially during a surgeon's learning curve.

Adjuvant chemotherapy and age-related biases in non-small cell lung cancer.

BACKGROUND: Five-year survival for early-stage lung cancer despite complete surgical resection is approximately 50%. Adjuvant chemotherapy has been shown to improve survival in some patients. Older cancer patients do not always receive standard therapy. The purpose of this study was to determine if there were age-related biases concerning the use of adjuvant chemotherapy after lobectomy for elderly patients with non-small cell lung cancer (NSCLC). METHODS: A prospective lung cancer outcomes database was queried for all patients undergoing lobectomy for NSCLC pathologic stage IB and higher between April 2006 and October 2010. Patients who received neoadjuvant treatment or who died within 30 days of operation were excluded. Ninety-nine patients met the inclusion criteria. Patients were divided into 2 groups based on age (<70 or ≥70 years). The use of adjuvant chemotherapy was compared between groups. RESULTS: Sixty-nine patients (70%) were younger than 70 years and 30 (30%) were 70 years or older. There was a significant difference in the use of adjuvant chemotherapy between the 2 groups, with 46 (66.7%) of the younger patients and 7 (25%) of the elderly patients receiving adjuvant treatment (p<0.01). The difference persisted when analyzed by stage, with older patients less likely to receive chemotherapy among all patients with stage IB disease, stage II or more advanced disease, and stage IB lesions greater than or equal to 4 cm plus stage II or more advanced disease. In multivariate analysis of preoperative and postoperative factors, age remained the only independent predictor of chemotherapy use. CONCLUSIONS: Patients undergoing lobectomy who were 70 years of age or older received adjuvant chemotherapy less often than did younger patients.

Man is fashioned, not born: the contributions of George J. Heuer to surgical education.

George Heuer undertook his medical education and residency training in surgery at Johns Hopkins. He then joined the surgical faculty under Halsted. He became Chair of Surgery at the University of Cincinnati in 1922, where he developed the second formal surgical training program modeled on Halsted's principles. Subsequently, he became Chair of Surgery at Cornell where he founded another surgical residency. His training programs stressed broad and thorough experience, and he championed increasing resident responsibility and independence. The demonstrated efficacy of his surgical residencies assisted greatly in the formation of subsequent resident training programs across this country.

The 2010 Thoracic Surgery Residents Association workforce survey report: a view from the trenches.

BACKGROUND: Workforce estimates suggest 11% of general surgery residents are considering careers in cardiothoracic (CT) surgery. In an effort to identify areas for programmatic improvement, we examined trends in thoracic surgery residents' perspectives on training and employment. METHODS: Results from the 2010 Thoracic Surgery Residents Association workforce survey were analyzed. The survey was administered to all trainees in North America during the annual in-service exam. Longitudinal trends from 2006 to 2010 are reported. RESULTS: Of 299 respondents, 76% (228 of 299) were US citizens. The most common determinants in choosing CT surgery were types of cases (123 of 299, 41%) and mentorship (95 of 299, 32%). Sixty-five percent (193 of 299) would recommend CT surgery to potential trainees. While 81% (242 of 299) felt they would be adequately trained in their program, 39% (118 of 299) planned additional fellowship training. Only 23% (70 of 299) felt the 80-hour work week had a positive impact on training. Of residents seeking jobs, 68% (62 of 92) received 2 or more job interviews and 70% (69 of 99) more than 1 job offer. Seventeen percent (16 of 92) had no offers. While 45% (51 of 114) reported still searching for employment, 20% (23 of 114) had accepted private practice positions, 25% (29 of 114) academic positions, and 6% (7 of 114) fellowship positions. Education-related debt was greater than $100,000 in 46% (140 of 299) and greater than $200,000 in 17% (52 of 299). From 2007 to 2010, CT residents reporting debt greater than $200,000 rose from 8% to 17%. Accepted fellowship training positions dropped to 6% in 2010 compared with 13% and 15% in 2008 and 2009, respectively. CONCLUSIONS: Diminished CT job opportunities remain a concern. There are concerning trends in debt accrual and perceptions of work-hour restrictions on quality of training. These data justify further investigation into areas of improvement in CT training.

Spontaneous left main coronary artery dissection complicated by pseudoaneurysm formation in pregnancy: role of CT coronary angiography.

We report a case of a 26-year-old female, who presented at 34 weeks of an uncomplicated pregnancy with an acute ST elevation anterior wall myocardial infarction. Cardiac catheterization suggested a left main coronary artery dissection with pseudoaneurysm formation. The patient's course was complicated by congestive heart failure. She was initially managed conservatively by a multidisciplinary team including heart failure specialists, obstetricians, and cardiovascular surgeons. 4 days after admission, her LMC was imaged by dual-source 64 slice Cardiac computed tomography, coronary dissection was identified extending to the lumen, and the presence of pseudoaneurysm was confirmed. She underwent subsequently a staged procedure, which included placement of an intra-aortic balloon pump, cesarean section, and coronary artery bypass grafting. This case illustrates the utility of coronary artery CT imaging to assess the complexity and stability of coronary artery dissections, thereby helping to determine the need for, and timing of revascularization procedures.