Local Anesthesia in Open Inguinal Hernia Repair Improves Postoperative Quality of Life Compared to General Anesthesia: A Prospective, International Study

The choice of general (GA) versus local anesthesia (LA) in open inguinal hernia repair (OIHR) has a substantial financial impact and may influence clinical outcomes. Our study compares postoperative quality of life (QOL) in patients undergoing OIHR under LA versus GA. A cooperative prospective study from centers in 10 countries was performed through the International Hernia Mesh Registry from 2007 to 2012. QOL was compared at one, six, 12, and 24 months for LA versus GA with univariate and multivariate analysis controlling for known confounding variables. Of 1128 patients who underwent OIHR, 585(52%) used GA and 533(48%) used LA. Most were male (92%) with unilateral (94%), primary (91%) repairs with a mean age 57 ± 16 years. There was no difference ( P > 0.05) in age, gender, operative time, mesh size, length of stay, infection, recurrence, reoperation, or death. Multivariate analysis demonstrated significant QOL differences between groups: GA had higher odds of discomfort at one and six months [odds ratio (OR) 3.3, 2.0], movement limitation at one and six months (OR 3.5, 2.8), and mesh sensation at one and 12 months (OR 2.9, 1.8). Overall, patients undergoing OIHR under LA had improved postoperative QOL in the short and long term compared with GA.

Local Anesthesia in Open Inguinal Hernia Repair Improves Postoperative Quality of Life Compared to General Anesthesia: A Prospective, International Study

The choice of general (GA) versus local anesthesia (LA) in open inguinal hernia repair (OIHR) has a substantial financial impact and may influence clinical outcomes. Our study compares postoperative quality of life (QOL) in patients undergoing OIHR under LA versus GA. A cooperative prospective study from centers in 10 countries was performed through the International Hernia Mesh Registry from 2007 to 2012. QOL was compared at one, six, 12, and 24 months for LA versus GA with univariate and multivariate analysis controlling for known confounding variables. Of 1128 patients who underwent OIHR, 585(52%) used GA and 533(48%) used LA. Most were male (92%) with unilateral (94%), primary (91%) repairs with a mean age 57 ± 16 years. There was no difference (P > 0.05) in age, gender, operative time, mesh size, length of stay, infection, recurrence, reoperation, or death. Multivariate analysis demonstrated significant QOL differences between groups: GA had higher odds of discomfort at one and six months [odds ratio (OR) 3.3, 2.0], movement limitation at one and six months (OR 3.5, 2.8), and mesh sensation at one and 12 months (OR 2.9, 1.8). Overall, patients undergoing OIHR under LA had improved postoperative QOL in the short and long term compared with GA.

Computed tomographic measurements predict component separation in ventral hernia repair

BACKGROUND

Preoperative imaging with computed tomography (CT) scans can be useful in preoperative planning. We hypothesized that CT measurements of ventral hernia defect size and abdominal wall thickness (AWT) would correlate with postoperative complications and need for complex abdominal wall reconstruction (AWR).

MATERIALS AND METHODS

Patients who underwent open ventral hernia repair and had preoperative abdominal CT imagining were identified from an institutional hernia-specific surgery outcomes database at our tertiary referral hernia center. Grade III and IV hernias and biologic mesh cases were excluded. CT measures of defect size and AWT were analyzed and correlated to complications and the need for AWR techniques using univariate, multivariate, and principal component (PC) analyses. PC1 and PC2 used five AWT measures, hernia defect width, and body mass index to create a new component variable.

RESULTS

There were 151 open ventral hernia repairs included in the study. Preoperative findings included 37.7% male; age 55.3 ± 12.5 years; body mass index (BMI) 33.3 ± 7.8 kg/m(2); 60.3% were recurrent hernias with average defect width 8.5 ± 5.0 cm and area 178.3 ± 214 cm(2); AWT at umbilicus 3.5 ± 1.8 cm; and AWT at pubis 7.0 ± 3.2. Component separation was performed in 24.0% of patients and panniculectomy in 34.4%. Wound complications occurred in 13.3% patients, and 2.7% had hernia recurrence. Increasing defect width, length, and area as well as select AWT measurements were associated with increased need for component separation, concomitant panniculectomy, and higher rates of wound and total complications (all P < 0.05). Using multivariate regression, PC1 was associated with wound complications (odds ratio [OR], 1.08; 95% confidence interval [CI], 1.01-1.16); PC2 (hernia defect width) was associated with the need for component separation (OR, 1.16; 95% CI, 1.03-1.30). Hernia recurrence was not predicted by AWT or defect size (OR, 1.00; 95%CI, 0.87-1.15).

CONCLUSIONS

Preoperative CT measurements of hernia defects and AWT predict wound complications and the need for complex AWR techniques. Obtaining preoperative CT imaging should be a consideration in preoperative planning and may help with patient counseling.

The current status of biosynthetic mesh for ventral hernia repair

Although synthetic mesh has dramatically reduced recurrence in elective hernia repair, its use in contaminated surgical fields has been traditionally associated with complications such as wound sepsis, enterocutaneous fistulas, and chronic prosthetic infection. Biologic meshes emerged in the late 1990s with a rapid popularity fueled largely by the demand for an appropriate substitute in lieu of synthetic mesh in these complex cases; however, the high cost and rate of hernia recurrence have tempered the initial enthusiasm. Biosynthetic meshes were developed as a possible cost-effective alternative to both synthetic and tissue-derived products. Using biodegradable polymers instead of animal or cadaver tissue, they provide a temporary scaffold for deposition of proteins and cells necessary for tissue ingrowth, neovascularization, and host integration. Herein we review the current status of biosynthetic meshes for hernia repair.

Impact of the Establishment of a Specialty Hernia Referral Center

Background. Creating a surgical specialty referral center requires a strong interest, expertise, and a market demand in that particular field, as well as some form of promotion. In 2004, we established a tertiary hernia referral center. Our goal in this study was to examine its impact on institutional volume and economics. Materials and methods. The database of all hernia repairs (2004-2011) was reviewed comparing hernia repair type and volume and center financial performance. The ventral hernia repair (VHR) patient subset was further analyzed with particular attention paid to previous repairs, comorbidities, referral patterns, and the concomitant involvement of plastic surgery. Results. From 2004 to 2011, 4927 hernia repairs were performed: 39.3% inguinal, 35.5% ventral or incisional, 16.2% umbilical, 5.8% diaphragmatic, 1.6% femoral, and 1.5% other. Annual billing increased yearly from 7% to 85% and averaged 37% per year. Comparing 2004 with 2011, procedural volume increased 234%, and billing increased 713%. During that period, there was a 2.5-fold increase in open VHRs, and plastic surgeon involvement increased almost 8-fold, ( P = .004). In 2005, 51 VHR patients had a previous repair, 27.0% with mesh, versus 114 previous VHR in 2011, 58.3% with mesh ( P < .0001). For VHR, in-state referrals from 2004 to 2011 increased 340% while out-of-state referrals jumped 580%. In 2011, 21% of all patients had more than 4 comorbidities, significantly increased from 2004 ( P = .02). Conclusion. The establishment of a tertiary, regional referral center for hernia repair has led to a substantial increase in surgical volume, complexity, referral geography, and financial benefit to the institution.

Regionalization and outcomes of hepato-pancreato-biliary cancer surgery in USA

BACKGROUND

Recent publications demonstrate regionalization of complex operations to high-volume centers (HVCs) in the USA. We hypothesize that this pattern applies to hepato-pancreato-biliary (HPB) cancer resections and improved outcomes.

METHODS

The Nationwide Inpatient Sample (NIS) data were analyzed from 1995-1999(T1) to 2005-2009(T2) for all HPB oncologic resections. Division of hospitals into high-, mid-, and low-volume centers (HVC, MVC, LVC) was performed. Multivariate regression was utilized to identify predictors of LVC resection. Outcomes were compared in both eras.

RESULTS

A total of 45,815 cases met the inclusion criteria (19,250 from T1 and 25,565 from T2). At T1, 32.5% of resections were performed at HVCs and 34.9% at LVCs. At T2, 60.8% were performed at HVCs versus 18.5% at LVCs. In T1, inpatient mortality at HVCs versus LVCs was 3.3% versus 8.67% (p < 0.0001) and 2.7% versus 6.5% (p < 0.0001) in T2. LOS and routine discharge were improved in HVCs, but total charges were higher. All outcomes significantly differed between HVCs and LVCs in multivariate analysis, except for LOS and total charges in T2.

CONCLUSION

The most recent NIS data demonstrate better outcomes in HVCs for HPB oncologic resections. These trends reflect alignment with national recommendations to centralize complex cancer surgery, as well as improved outcomes in all centers.

Nationwide outcomes of nontrauma splenectomy

INTRODUCTION

Due to the impact of LeapFrog and many scientific publications, regionalization for solid-organ operations gained momentum in the early 2000s. This study examines the effects of regionalization for medically indicated, nontrauma splenectomies (NTSs) in the USA.

METHODS

The Nationwide Inpatient Sample (NIS) data were analyzed for NTS based on International Classification of Disease Ninth Revision Clinical Modification codes for 1998–1999 (the 1990s) and 2008–2009 (the 2000s). The hospitals in the NIS were stratified by volume and divided into high volume (HV), medium volume, and low-volume (LV) terciles based on the annual volume of splenectomies performed (<5, 5–10, and 11+, respectively). Demographics, comorbidities, complications, admission status, and in-patient mortality were recorded. Univariate and multivariate statistical analyses were utilized.

RESULTS

NIS recorded 4,293 NTS performed in the 1990s and 3,384 in the 2000s. Despite the decrease in operative volume, regionalization did not occur: in the first decade 30, 37, and 33 % of cases occurred in LV center (LVC), medium volume center, and HV center (HVC), respectively, compared with 34, 30, and 36 % in the second decade (p < 0.001). Patients were older in low-volume hospitals (LVC) than in high-volume hospitals (HVC) in both decades (in the 1990s: 45.3 vs. 52.7 years, p < 0.001; in the 2000s: 49.1 vs. 54.5 years, p < 0.001). The Charlson Comorbidity Index scores were not different in LVC compared with HVC in both decades (the 1990s: 1.31 vs. 1.23, p = 0.73; the 2000s: 1.54 vs. 1.41, p = 0.72). In both decades, LVC had more emergent admissions than HVC (20.3 vs. 16.8 %, p = 0.03; 28.8 vs. 19.5 %, p < 0.001). Complication rates were higher in LVC in both decades (the 1990s: 16.9 vs. 13.6 %, p = 0.02; the 2000s: 19.8 vs. 15.5 %, p = 0.006). Mortality was not different for HVC and LVC in both decades (the 1990s: 3.75 vs. 4.27, p = 0.49; the 2000s: 2.94 vs. 4.03, p = 0.15).

CONCLUSIONS

NTS has not been affected by regionalization, which is dissimilar to other solid-organ abdominal procedures. Indeed, the benefit of regionalization for splenectomy has not been established.

Preoperative pain is the strongest predictor of postoperative pain and diminished quality of life after ventral hernia repair

With evolution of hernia repair surgery, quality of life (QOL) became a major outcome measure in nearly 350,000 ventral hernia repairs (VHRs) performed annually in the United States. This study identified predictors of chronic pain after VHR. A prospective database of patient-reported QOL outcomes at a tertiary referral center was queried from 2007 to 2010; 512 patients met inclusion criteria. Factors including demographics, medical comorbidities, preoperative symptoms, and hernia characteristics were analyzed using advanced statistical modeling. Average age was 56.4 years, 57.6 per cent were males, mean body mass index was 33 kg/m(2), hernia defect size was 138 cm(2), and 35.5 per cent were repaired laparoscopically. Preoperatively, 69 per cent of patients had mild and 28 per cent severe pain during some activities. Pain levels were elevated in the first month postoperatively; by 6 months, patients reported significant improvement. The most significant and consistent predictor of postoperative pain was the presence of preoperative pain (odds ratio, 2.1; 95% confidence interval, 1.4 to 3.0; P = 0.0001). Older patients and men had less postoperative pain, but they also had less preoperative pain, so these factors were not independent predictors. Patients with minimal preoperative symptoms uniformly experienced resolution of pain by 6 months postoperatively. Among patients with severe preoperative pain, one-third reported long-term resolution of pain, and one-third had persistent severe pain. The former group had smaller hernias (91 vs 194 cm(2), respectively, P = 0.015). Cases of new-onset, long-term pain after VHR were rare (less than 2%). Most patients' symptoms resolve by 6 months after surgery, but those with severe preoperative pain are at risk for persistent postoperative pain.

Postoperative quality of life after open transinguinal preperitoneal inguinal hernia repair using memory ring or three-dimensional devices

A transinguinal preperitoneal (TIPP) approach has become a common technique for inguinal hernia repair. Our goal was to compare the impact of the two mesh designs for this operation: a flat mesh with a memory ring device (MRD) or a three-dimensional device (3DD) containing both onlay and preperitoneal mesh components. The prospective International Hernia Mesh Registry (2007 to 2012) was queried for MRD and 3DD inguinal hernia repairs. Outcomes and patient quality of life (QOL), using the Carolinas Comfort Scale (CCS), were examined at 1, 6, 12, and 24 months. Standard statistical methods were used, and multivariate logistic regression was performed using a forward stepwise selection method. TIPP was performed in 956 patients. Their average age 57.4 ± 15.3 years, 94.0 per cent were male, and mean body mass index was 25.7 ± 3.2 kg/m(2). MRD was used in 131 and 3DD in 825. Follow-up was 97, 82, 87, and 80 per cent at 1, 6, 12, and 24 months, respectively. Complications were not significantly different (P > 0.05). Recurrence was 0.8 per cent for MRD and 2.1 per cent for 3DD (P = 0.45). Comparing patient outcomes of MRD with 3DD at 1 month, 18.9 versus 11.5 per cent had symptoms of mesh sensation (P = 0.02); 28.7 versus 14.8 per cent had movement limitations (P < 0.01). MRD use was a significant independent predictor of movement limitation (odds ratio, 2.3; confidence interval, 1.4 to 3.7). No significant differences in CCS scores were seen at 6, 12, and 24 months. TIPP repair is safe and has a low recurrence rate. Early postoperative QOL is significantly improved with a 3DD mesh compared with MRD.

Quality of Life Following Component Separation Versus Standard Open Ventral Hernia Repair for Large Hernias

Introduction. Component separation (CS) has become a viable alternative to repair large ventral defects when the fascia cannot be reapproximated. However, the impact of transecting the external oblique to facilitate closure of the abdomen on quality of life (QOL) has yet to be investigated. The study goal was to investigate QOL and outcomes after standard open ventral hernia repair (OVHR) versus CS for large ventral hernias. Study design. Prospective data for all CSs were reviewed and compared with matched OVHR controls. All defects were 100 to 1000 cm2 in size and repaired with mesh. Comorbidities, complications, outcomes, and Carolinas Comfort Scale (CCS) scores, were reviewed. Results. Seventy-four CS patients were compared with 154 patients undergoing standard OVHR with similar defect sizes. Age (56.7±13.0 vs 54.7 ± 12.3 years, P = .26), defect sizes (299 ± 160 vs 304 ± 210cm2, P = .87), and BMI (32.7 ± 6.9 vs 34.2 ± 9.0 kg/m2, P = .26) were similar in both groups, respectively. There were no differences in major postoperative complications (P = .22), mesh infections (P = 1.00), wound infections (P = .07), or hernia recurrence (P = .09), but wound breakdown increased after CS (10% vs 1%, P < .001) as did seroma interventions (15% vs 4%, P = .005). Postoperative CCS scores were similar at 1 month (P = .82) and 1 year (P = .14). Conclusions. In the first comparative study of its kind, it is found that patient undergoing CS with mesh reinforcement had equal short- and long-term QOL outcomes compared with similar patients who underwent standard OVHR. Whereas wound breakdown and seroma formation are higher, the overall complication, mesh infection, and recurrence rates are similar.

The Regionalization of Ventral Hernia Repair: Occurrence and Outcomes over a Decade

Ventral hernia repairs (VHRs) have always been considered standard general surgery cases. Recently, there has been a call for “Centers of Excellence.” We sought to investigate outcomes and trends between high- and low-volume centers. The Nationwide Inpatient Sample (NIS) data were analyzed from 1998–1999 (T1) and 2008–2009 (T2) for all VHRs. Hospitals were stratified into high-, medium-, and low-volume centers (HVC/MVC/LVC). Demographics, comorbidities, and outcomes were compared. Surgical cases totaled 22,771 in T1 and 37,044 in T2. In T1, 34.3 per cent were performed in HVC versus 64.2 per cent in T2 ( P < 0.0001). LVC cases decreased between eras: 32.6 versus 16.1 per cent ( P < 0.0001). Comorbidities and emergent admissions increased with time ( P < 0.0001). Mortality was similar in both eras and between volume centers. Length of stay was less in LVC in T2 only (4.2 vs 4.8 days, P < 0.0001). Total charges were higher in HVCs in both eras ( P < 0.0001). These remained significant in T2 in multivariate regression (MVR). Hospital volume was not associated with most complications or death in either era with MVR. Charlson comorbidity score, age, and emergent admission were predictors of complications and death. Regionalization has occurred for VHRs. However, most complication and mortality rates are unrelated to volume and are linked to comorbidities, age, and emergencies.

The regionalization of ventral hernia repair: occurrence and outcomes over a decade

Ventral hernia repairs (VHRs) have always been considered standard general surgery cases. Recently, there has been a call for "Centers of Excellence." We sought to investigate outcomes and trends between high- and low-volume centers. The Nationwide Inpatient Sample (NIS) data were analyzed from 1998-1999 (T1) and 2008-2009 (T2) for all VHRs. Hospitals were stratified into high-, medium-, and low-volume centers (HVC/MVC/LVC). Demographics, comorbidities, and outcomes were compared. Surgical cases totaled 22,771 in T1 and 37,044 in T2. In T1, 34.3 per cent were performed in HVC versus 64.2 per cent in T2 (P < 0.0001). LVC cases decreased between eras: 32.6 versus 16.1 per cent (P < 0.0001). Comorbidities and emergent admissions increased with time (P < 0.0001). Mortality was similar in both eras and between volume centers. Length of stay was less in LVC in T2 only (4.2 vs 4.8 days, P < 0.0001). Total charges were higher in HVCs in both eras (P < 0.0001). These remained significant in T2 in multivariate regression (MVR). Hospital volume was not associated with most complications or death in either era with MVR. Charlson comorbidity score, age, and emergent admission were predictors of complications and death. Regionalization has occurred for VHRs. However, most complication and mortality rates are unrelated to volume and are linked to comorbidities, age, and emergencies.

The green operating room: simple changes to reduce cost and our carbon footprint

Generating over four billion pounds of waste each year, the healthcare system in the United States is the second largest contributor of trash with one-third produced by operating rooms. Our objective is to assess improvement in waste reduction and recycling after implementation of a Green Operating Room Committee (GORC) at our institution. A surgeon and nurse-initiated GORC was formed with members from corporate leadership, nursing, anesthesia, and OR staff. Initiatives for recycling opportunities, reduction of energy and water use as well as solid waste were implemented and the results were recorded. Since formation of GORC in 2008, our OR has diverted 6.5 tons of medical waste. An effort to recycle all single-use devices was implemented with annual solid waste reduction of approximately 12,860 lbs. Disposable OR foam padding was replaced with reusable gel pads at greater than $50,000 per year savings. Over 500 lbs of previously discarded batteries were salvaged from the OR and donated to charity or redistributed in the hospital ($9,000 annual savings). A "Power Down" initiative to turn off all anesthesia and OR lights and equipment not in use resulted in saving $33,000 and 234.3 metric tons of CO2 emissions reduced per year. Converting from soap to alcohol-based waterless scrub demonstrated a potential saving of 2.7 million liters of water annually. Formation of an OR committee dedicated to ecological initiatives can provide a significant opportunity to improve health care's impact on the environment and save money.

Laparoscopic versus open hernia repair: outcomes and sociodemographic utilization results from the nationwide inpatient sample

INTRODUCTION

The differences and advantages of laparoscopic (LVHR) and open ventral hernia repair (OVHR) have been debated since laparoscopic hernia repair was first described. The purpose of this study is to compare LVHR and OVHR with mesh in the United States using the Nationwide Inpatient Sample (NIS).

METHODS

The NIS, a representative sample of approximately 20% of all inpatient encounters in the United States, was queried for all ventral hernia repairs with graft or prosthesis in 2009 using ICD-9-CM codes. The patients were stratified into LVHR and OVHR groups. Sociodemographic data, comorbidities, complications, and outcomes were compared between groups.

RESULTS

A total of 18,223 cases were documented in the NIS sample after inclusion and exclusion criteria were met. LVHR was performed in 27.6% of cases. There were no statistically significant differences in gender or mean income by zip code of residence. Mean age (58.8 years in open group vs. 58.1 years, p = 0.014) and mean Charlson score (0.97 vs. 0.77, p < 0.0001) differed significantly between groups. OVHR more often was associated with emergent admissions (21.7 vs. 15.2%, p < 0.0001). There were significant differences comparing outcomes between groups: complication rate (OVHR: 8.24 vs. LVHR: 3.97%, p < 0.0001), average length of stay (5.2 vs. 3.5 days, p < 0.0001), total charge ($45,708 vs. $35,947, p < 0.0001), frequency of routine discharge (80.8 vs. 91.1%, p < 0.0001), and mortality rate (0.88 vs. 0.36%, p = 0.0002). After controlling for confounding variables with multivariate regression, all outcomes remained significant between groups.

CONCLUSIONS

Patients who have undergone LVHR with mesh had fewer complications, shorter length of stay, lower hospital charges, more frequent routine discharge, and decreased mortality compared with those who received open repair. Patient comorbidities, selection bias, and emergency operations may limit the number of patients who receive laparoscopic ventral hernia repair. Regionalization studies may better illuminate the low rates of laparoscopic surgery.

Lysostaphin-Coated Mesh Prevents Staphylococcal Infection and Significantly Improves Survival in a Contaminated Surgical Field

Mesh and wound infections during hernia repair are predominantly caused by Staphylococcus aureus. Human acellular dermis (HAD) is known to lose its integrity in the face of large bacterial loads. The goal of this study was to determine if lysostaphin (LS), a naturally occurring anti-Staphylococcal protein, can protect HAD mesh from S. aureus infection. HAD samples, 3 cm X 3 cm, were implanted in the onlay fashion on the anterior abdominal wall of rats (n = 75). Subjects were grouped based on presence of antimicrobial bound to HAD (none or LS) and presence of S. aureus inoculum (sterile, 106, 108 CFU). At 60 days, meshes were explanted, and bacterial growth, histology, and mesh tensile strength were examined. None of the controls receiving bacterial inoculation without LS survived to 60 days. All LS-HAD sterile and LS-106 animals survived to explantation. The LS-HAD 108 group had a mortality rate of 50 per cent. All surviving LS-treated animals (n = 25) had negative wound and mesh cultures. Blinded gross and histologic evaluation and measured tensile strengths between all LS groups were comparable. Animals implanted with LS-HAD had a dramatically improved rate of survival. All animals surviving to 60 days had completely cleared S. aureus from their wounds with maintenance of mesh integrity and tensile strength. These findings strongly suggest the clinical use of LS-treated mesh in contaminated fields may translate into a more durable hernia repair.