Postoperative Volume Research Articles

Using Anatomy-Based Fitting to Reduce Frequency-to-Place Mismatch in Experienced Bilateral Cochlear Implant Users: A Promising Concept.

Fitting cochlear implant (CI) users can be challenging. Anatomy-based fitting (ABF) maps may have the potential to lead to better objective and subjective outcomes than conventional clinically based fitting (CBF) methods. ABF maps were created via information derived from exact electrode contact positions, which were determined via post-operative high-resolution flat panel volume computer tomography and clinical fitting software. The outcome measures were speech understanding in quiet and noise and self-perceived sound quality with the CBF map and with the ABF map. Participants were 10 experienced bilateral CI users. The ABF map provided better speech understanding in quiet and noisy environments compared to the CBF map. Additionally, two approaches of reducing the frequency-to-place mismatch revealed that participants are more likely to accept the ABF map if their electrode array is inserted deep enough to stimulate the apical region of their cochlea. This suggests an Angular Insertion Depth of the most apical contact of around 720°-620°. Participants had better speech understanding in quiet and noise with the ABF map. The maps' self-perceived sound quality was similar. ABF mapping may be an effective tool for compensating the frequency-to-place mismatch in experienced bilateral CI users.

Clinical characteristics of 13 cases with entrapped temporal horn syndrome and efficacy of refined temporal-to-frontal horn shunt

Thirteen consecutive patients with entrapped temporal horn syndrome in the Department of Neurosurgery of Beijing Tiantan Hospital from February 2018 to September 2022 were retrospectively analyzed, and there were 5 males and 8 females, with a mean age of (43±21) years. Increased intracranial pressure caused by hydrocephalus was the main clinical symptom. All the patients underwent refined temporal-to-frontal horn shunt, and all the symptoms were improved after surgery. Postoperative Karnofsky performance score (KPS) [90 (90, 100)] was higher than preoperative KPS [57 (40, 70)] (P=0.001). However, postoperative entrapped temporal horn volume [13.85 (8.90, 15.25) cm3] decreased, compared with preoperative volume [66.52 (38.65, 88.65) cm3] (P=0.001). Likewise, postoperative midline shift [0.77 (0, 1.50) mm] was longer than preoperative midline shift [6.69 (2.50, 10.00) mm] (P=0.002). No surgery-related complications were observed after the operation. Therefore, the refined temporal-to-frontal horn shunt is safe and effective treatment for entrapped temporal horn syndrome, with favorable outcomes.

Difference in the outcomes of anterior tenting and wrapping techniques for acellular dermal matrix coverage in prepectoral breast reconstruction

Acellular dermal matrices (ADMs) play an essential role in prepectoral implant-based breast reconstructions; however, the most appropriate method for ADMs is unknown. We conducted a retrospective analysis of our institutional database. Patients who underwent mastectomy and prepectoral breast reconstruction using tissue expanders or breast implants covered with ADMs between March 2018 and June 2021 were included. Patient characteristics, postoperative complications, and long-term outcomes were investigated. In total, 112 patients (126 breasts) were included. The anterior tenting and wrapping techniques were used in the reconstruction of 32 (25.3%) and 94 (74.7%) breasts, respectively. Using propensity score matching, nine breasts were selected for each technique within the direct-to-implant reconstruction group, while 16 breasts were selected for each technique within the 2-stage reconstruction group. The choice of technique (anterior vs. wrapping) in implementing ADM did not generate any significant differences in postoperative complications, including seroma formation and capsular contracture, for the direct-to-implant and 2-stage reconstruction groups. Regarding the direct-to-implant reconstruction group, the average postoperative drain volume was less in the anterior tenting group than that in the wrapping group (anterior tenting vs. wrapping; 495.09±156.118mL vs. 673.43±307.954mL, p=0.006), but the difference was insignificant after propensity score matching. We report our experience with covering prosthetic devices with ADMs during postmastectomy breast reconstruction. No differences in the postoperative drain volume or postoperative outcomes were found between the study groups. Future studies are needed to determine the method that provides the most satisfactory results.

Surgical cytoreduction of deep-seated high-grade glioma through tubular retractor.

Maximal safe resection is the goal of surgical treatment for high-grade glioma (HGG). Deep-seated hemispheric gliomas present a surgical challenge due to safety concerns and previously were often considered inoperable. The authors hypothesized that use of tubular retractors would allow resection of deep-seated gliomas with an acceptable safety profile. The purpose of this study was to describe surgical outcomes and survival data after resection of deep-seated HGG with stereotactically placed tubular retractors, as well as to discuss the technical advances that enable such procedures. This is a retrospective review of 20 consecutive patients who underwent 22 resections of deep-seated hemispheric HGG with the Viewsite Brain Access System by a single surgeon. Patient demographics, survival, tumor characteristics, extent of resection (EOR), and neurological outcomes were recorded. Cannulation trajectories and planned resection volumes depended on the relative location of white matter tracts extracted from diffusion tractography. The surgical plans were designed on the Brainlab system and preoperatively visualized on the Surgical Theater virtual reality SNAP platform. Volumetric assessment of EOR was obtained on the Brainlab platform and confirmed by a board-certified neuroradiologist. Twenty adult patients (18 with IDH-wild-type glioblastomas and 2 with IDH-mutant grade IV astrocytomas) and 22 surgeries were included in the study. The cohort included both newly diagnosed (n = 17; 77%) and recurrent (n = 5; 23%) tumors. Most tumors (64%) abutted the ventricular system. The average preoperative and postoperative tumor volumes measured 33.1 ± 5.3 cm3 and 15.2 ± 5.1 cm3, respectively. The median EOR was 93%. Surgical complications included 2 patients (10%) who developed entrapment of the temporal horn, necessitating placement of a ventriculoperitoneal shunt; 1 patient (5%) who suffered a wound infection and pulmonary embolus; and 1 patient (5%) who developed pneumonia. In 2 cases (9%) patients developed new permanent visual field deficits, and in 5 cases (23%) patients experienced worsening of preoperative deficits. Preoperative neurological or cognitive deficits remained the same in 9 cases (41%) and improved in 7 (32%). The median overall survival was 14.4 months in all patients (n = 20) and in the newly diagnosed IDH-wild-type glioblastoma group (n = 16). Deep-seated HGGs, which are surgically challenging and frequently considered inoperable, are amenable to resection through tubular retractors, with an acceptable safety profile. Such cytoreductive surgery may allow these patients to experience an overall survival comparable to those with more superficial tumors.

Postoperative Graft Volume Reduction Is Associated With Inferior Clinical Outcomes of Superior Capsule Reconstruction Using an Acellular Dermal Matrix Allograft

To evaluate whether postoperative graft volume reduction is associated with clinical outcomes after superior capsule reconstruction (SCR) and to identify factors related to graft volume change. Between May 2018 and June 2021, patients who underwent SCR with acellular dermal matrix allograft for irreparable rotator cuff tear with a minimum 1-year follow-up and who had intact graft continuity in postoperative 6-month magnetic resonance imaging were retrospectively reviewed. The lateral half to the medial half of the graft volume ratio was defined as lateral half graft volume ratio. The difference between the preoperative and postoperative lateral half graft volume ratio was defined as lateral half graft volume change. Patients were divided into 2 groups: those with preserved graft volume (group I) and those with reduced graft volume (group II). Intergroup differences in clinical and radiological characteristics were analyzed. A total of 81 patients were included, with 47 (58.0%) in group I and 34 (42.0%) in group II. Group I showed significantly lower lateral half graft volume change (0.018 ± 0.064 vs 0.370 ± 0.177; P < .001) than group II. Group II showed significantly greater preoperative Hamada grade (1.3 ± 0.5 vs 2.2 ± 0.6, P < .001), an anteroposterior distance of the graft at the greater tuberosity (APGT) (30.3 ± 4.8 vs 35.2 ± 3.8, P < .001), and fatty infiltration of infraspinatus (2.3 ± 0.9 vs 3.1 ± 0.8, P < .001) and subscapularis (0.9 ± 0.9 vs 1.6 ± 1.3, P= .009) than group I. Group II had a significantly lower proportion of patients achieving MIC in Constant score than group I (70.2% vs 47.1%, P= .035). The Hamada grade, APGT, and fatty infiltration of infraspinatus and subscapularis were independent factors of graft volume change. Although SCR improved pain and shoulder function, postoperative graft volume reduction was related to a lower rate of minimal important change achievement in the Constant score compared with preserved graft volume. The preoperative Hamada grade, APGT, and fatty infiltration of infraspinatus and subscapularis were associated with graft volume reduction. Level III, retrospective case-control study.

Role of extent of resection on the survival of glioblastoma multiforme

Background. Glioblastoma Multiforme (GBM) is the most prevalent form of brain cancer. The effect of Extent of Resection (EOR) on GBM survival is controversial. EOR degree, pre- and postoperative tumour volume estimation, and significance to residual tumour volume are still challenged. GBM has a 14-month Overall Survival (OS) rate. There is no evidence of a link between EOR and OS survival. We wish to determine whether GBM tumour removal increases survival. Methods. At the Regional Center for Neurosurgery and Neurology in Uzhhorod, Ukraine, we conducted a retrospective evaluation of 86 consecutive patients diagnosed with glioblastoma who underwent surgery between January 1, 2010, and December 31, 2020, and who are being followed until January 1, 2022. Patients were selected if they met the following criteria: they were at least 18 years old, they had a diagnosis of glioblastoma (primary, secondary, or recurrent), they were either IDH mutants or wild types, they had an MRI within 2 weeks before surgery, and they had another MRI within 72 hours after surgery. Before and after surgery, we did a volumetric analysis of gadolinium-enhanced T1 MRI scans of the tumour to figure out EOR. Partial resection (PR) is &lt;70%, sub-total resection (STR) is 70-90%, near-total resection (NTR) is 91-99%, and gross total resection (GTR) is &gt;99%. By comparing pre- and post-operative volumes with the EOR, the Kaplan-Meier survival curve and Cox's regression analysis determined the impact of the EOR on survival rates. Many researchers considered a p value of 0.05 or below to be significant. Results. A total of 86 patients were included in the analysis after being subjected to the criteria used to narrow the pool of potential participants. The average length of time people lived was 15 months. For PR patients, the median survival time was 3 months, for STR patients it was 10 months, and for NTR patients it was 16 months. Patients receiving GTR, on the other hand, had a considerably better outcome, with a median survival time of 36 months. This data demonstrate a direct correlation between EOR and survival rates. It was discovered that EOR improvement affected post-op survival. High EOR patients have a better prognosis for survival. Adjuvant therapy, pre- and post-operative KPS score, pre- and post-operative tumour volume, and gender also contributed significantly to enhanced survival. Conclusion. Patients with glioblastoma appear to benefit from a more aggressive treatment strategy that combines maximal safe resection with the use of salvage adjuvant therapy. There was a correlation between complete resection (gross total resection) of intracranial GBM and improved survival. Whenever feasible, complete surgical removal of the tumour is recommended.

Endoscopic endonasal transsphenoidal surgery for pituitary adenomas

Endoscopic endonasal transsphenoidal surgery (EETS) is a widely accepted technique for the surgical resection of pituitary tumours. In this report, we present our single-centre experience with EETS for pituitary adenomas, mainly focusing on its efficacy and postoperative complications. Among 100 patients who underwent EETS, 57 (57%) were female and 43 were (43%) male. The mean age of the patients was 51.55 ± 13.51 years. Nonfunctional adenoma was found in 61 (61%) patients, acromegaly was found in 29 (29%) patients, Cushing’s disease in six (6%), and prolactinoma was found in four (4%) patients. On average, a 75.8% decrease in the postoperative tumour volume was observed in nonfunctional adenomas. Surgical cure was achieved in 51.7% of patients with acromegaly, 50% of those with Cushing’s disease, and 25% of those with prolactinoma. The most common postoperative complication was found to be cerebrospinal fluid fistula.

Clinical Study of Liposuction Combined with Subareolar Incision Adenectomy for Gynecomastia

Objective: To investigate the clinical effect of liposuction combined with subareolar incision glandectomy in the treatment of Simon Grade Ⅲ adipo-glandular gynecomastia (GYN). Methods: From March 2021 to March 2022, the data of patients with Simon Grade Ⅲ adipo-glandular GYN treated by liposuction combined with glandectomy in the Department of Plastic Surgery, Zhongshan Hospital Affiliated to Dalian University and Henan Plastic Surgery and Aesthetic Hospital were retrospectively analyzed. Based on the medical records, color ultrasound was performed on the patient’s breast before surgery, which was determined to be GYN (more than 50% glandular tissue). A 3 mm long incision was made at the lower boundary of the surgical range, through which the adipose tissue in the hypertrophic region of the breast was repeatedly aspirated until a satisfactory thickness was achieved. The residual glandular tissue was removed by a semicircular arc incision under the areola, and then the areola incision was sutured in position. The blood flow, sensation, and wound healing of bilateral nipples and areola were observed after surgery, and the morphology of bilateral thorax and scar of incision were followed up. Results: A total of 15 GYN patients aged 18 to 35 years with body mass index of 23.8 to 26.5 kg/m2 (mean = 24.8 kg/m2) were included in this study. The average intraoperative liposuction volume of unilateral breast was 170 mL (150–200 mL), the average glandectomy volume was 115 g (95–125 g), and the average blood loss was about 40 mL (15–75 mL). Postoperative hypertrophic breast volume decreased significantly, and no complications such as hematoma, infection, skin ischemic necrosis, or sensory disturbance occurred in the nipple and areola, during the healing process. The patients were followed up for 3 to 6 months, and the bilateral thorax was smooth, symmetrical, and natural in contour. The incision was concealed, and the scar was not obvious. Conclusion: Liposuction combined with subareolar incision glandectomy in the treatment of Simon Grade Ⅲ adipo-glandular GYN is safe. The postoperative chest contour is smooth and natural, and the scar is small and invisible, which achieves good aesthetics.

Comparison of the Efficacy of Subosseous Window Neuro-Endoscopy and Minimally Invasive Craniotomy in the Treatment of Basal Ganglia Hypertensive Intracerebral Hemorrhage.

To compare the perioperative indexes and long-term effects of craniotomy and neuro-endoscopic hematoma removal in patients with hypertensive intracerebral hemorrhage (HICH) in the basal ganglia region. This study involved 128 patients with HICH in the basal ganglia region who were admitted to our hospital from February 2020 to June 2022. They were divided into 2 groups according to the random number table method. The craniotomy group (n = 70) underwent microsurgery with small bone window craniotomy with a side cleft, and the neuro-endoscopy group (n = 58) underwent small bone window neuro-endoscopic surgery. A 3-dimensional Slicer was used to calculate the hematoma volume and clearance rate and the postoperative brain tissue edema volume. The operation time, intraoperative blood loss, postoperative intracranial pressure, complications, mortality, and improvement in the modified Rankin scale score at 6 months postoperatively were compared between the two groups. The clearance rate was significantly higher in the neuro-endoscopy group than in the craniotomy group (94.16% ± 1.86% versus 90.87% ± 1.89%, P < 0.0001). The operation time was significantly lower in the neuro-endoscopy group than in the craniotomy group (89.9 ± 11.7 versus 203.7 ± 57.6min, P < 0.0001). Intraoperative blood loss was significantly higher in the craniotomy group (248.31 ± 94.65 versus 78.66 ± 28.96mL, P < 0.0001). The postoperative length of stay in the intensive care unit was 12.6 days in the neuro-endoscopy group and 14.0 days in the craniotomy group with no significant difference ( P = 0.196). Intracranial pressure monitoring showed no significant difference between the two groups on postoperative days 1 and 7. Intracranial pressure was significantly higher in the craniotomy group than in the neuro-endoscopy group on postoperative day 3 (15.1 ± 6.8 versus 12.5 ± 6.8mm Hg, P = 0.029). There was no significant difference in the mortality or outcome rate at 6 months postoperatively between the two groups. In patients with HICH in the basal ganglia region, neuro-endoscopy can significantly improve the hematoma clearance rate, reduce intraoperative hemorrhage and postoperative cerebral tissue edema, and improve surgical efficiency. However, the long-term prognosis of patients who undergo craniotomy through the lateral fissure is similar to that of patients who undergo neuro-endoscopic surgery.

Fluorescein-guided surgery for high-grade glioma resection: a five-year-long retrospective study at our institute.

This study investigates the extent of resection, duration of surgery, intraoperative blood loss, and postoperative complications in patients with high-grade glioma who received surgery with or without sodium fluorescein guidance. A single-center retrospective cohort study was conducted on 112 patients who visited our department and underwent surgery between July 2017 and June 2022, with 61 in the fluorescein group and 51 in the non-fluorescein group. Baseline characteristics, intraoperative blood loss, surgery duration, resection extent, and postoperative complications were documented. The duration of surgery was significantly shorter in the fluorescein group than in the non-fluorescein group (P = 0.022), especially in patients with tumors in the occipital lobes (P = 0.013). More critically, the gross total resection (GTR) rate was significantly higher in the fluorescein group than in the non-fluorescein group (45.9% vs. 19.6%, P = 0.003). The postoperative residual tumor volume (PRTV) was also significantly lower in the fluorescein group than in the non-fluorescein group (0.40 [0.12-7.11] cm3 vs. 4.76 [0.44-11.00] cm3, P = 0.020). Particularly in patients with tumors located in the temporal and occipital lobes (temporal, GTR 47.1% vs. 8.3%, P = 0.026; PRTV 0.23 [0.12-8.97] cm3 vs. 8.35 [4.05-20.59] cm3, P = 0.027; occipital, GTR 75.0% vs. 0.0%, P = 0.005; PRTV 0.15 [0.13-1.50] cm3 vs. 6.58 [3.70-18.79] cm3, P = 0.005). However, the two groups had no significant difference in intraoperative blood loss (P = 0.407) or postoperative complications (P = 0.481). Fluorescein-guided resection of high-grade gliomas using a special operating microscope is a feasible, safe, and convenient technique that significantly improves GTR rates and reduces postoperative residual tumor volume when compared to conventional white light surgery without fluorescein guidance. This technique is particularly advantageous for patients with tumors located in non-verbal, sensory, motor, and cognitive areas such as the temporal and occipital lobes, and does not increase the incidence of postoperative complications.

ID: 214384 Postoperative DBS Pneumocephalus Volume in Patients With Parkinson's Disease: Correlating Burr-Hole Size and Intraoperative Duration

Pneumocephalus can be linked to brain shift and impact the accuracy of stereotactic Deep Brain Stimulation (DBS) surgery. Previous literature has been unable to establish a correlation between burr hole size and the amount of pneumocephalus seen. Consequently, this work sought to determine if intraoperative burr hole size positively correlated with the volume of pneumocephalus observed on postoperative CT imaging in patients who underwent DBS. The duration of the surgery was also considered in order to see its impact on the pneumocephalus volume.

Impacts of in situ donor partial hepatectomy in pediatric liver transplantation

BackgroundPediatric liver transplantation is performed with either whole, reduced, split livers depending on the technical aspects of the surgery and the discrepancy between donor and recipient body dimensions. The optimal method of partial hepatectomy for pediatric transplants remains debated to this day: either in situ (i.e. occurring before liver removal from the donor) or ex situ (i.e. taking place after liver removal). In 2007, our tertiary academic center changed its surgical protocol from ex situ to in situ partial hepatectomy in deceased donor mainly to decrease bleeding complication risk among other amendments. Our study aimed to evaluate the clinical impact of this major modification on the post-operative blood products volume transfusion. MethodsA retrospective analysis of 104 patients who underwent liver transplantation at our pediatric center between 1998 and 2016 was performed. Patients receiving multiple organ transplantations or re-transplantation were excluded from the study. Differences in blood products transfusion volume, post-operative complications and mortality rates were compared between two periods implementing different surgical transplantation protocols: ex situ partial hepatectomy from 1998 to 2006 and in situ partial hepatectomy from 2007 to 2016. Results42 children from the original ex situ protocol group and 62 children from the modified in situ protocol group were included in the study. The median age and weight were 1.5 years (0.7–4.8 kg) and 11.1 kg (7.9–18.2), respectively. There were no significant differences in demographic data between groups. A significant decrease in liver transplant cold ischemia time was observed in the in situ group compared to the ex situ group (p < 0.001). A significant increase in vasopressor use was observed for the in situ group (64% (IS) vs. 24% ex situ group (p < 0.001)), as part of the protocol modifications. Median perioperative blood products transfusion volume was not significantly different between both groups: 275 ml/kg (76–497) ex situ group vs. 229 ml/kg (76–499) in situ group (p = 0.82). We observed a 28-day and 90-day mortality rate of 14.3% and 16.6%, respectively, for the ex situ group and 6.5% and 8.1%, respectively, for the in situ group. Hepatic artery thrombosis was found in the first 7 days in 7% of the ex situ group patients and 6% of the in situ group patients. There were no significant differences in post-operative mortality and morbidity rates observed between groups (p value of 0.29 and 0.28 for 28-days and 90-days mortality rates, respectively). ConclusionsAlthough the median amount of transfusion was higher in the ex-situ group, our study showed no significant differences in perioperative blood product transfusions, morbidity and mortality rates between ex-situ and in-situ partial hepatectomy procedures. Further multicenter studies should be conducted to confirm these results. Level of evidenceIII

Prognostic evaluation of surgical re-resection for recurrent glioblastoma using the novel RANO classification for extent of resection: A report of the RANO resect group.

2010 Background: The clinical effects of re-resection for recurrent glioblastoma remain controversial, and the role of post-operative tumor volume is unclear since leaving certain tumor volumes deliberately behind cannot be ethically justified. A surgical classification system was previously proposed for stratification based upon residual contrast-enhancing (CE) tumor: RANO class 1 was defined as ‘supramaximal CE resection’ (including non-CE tumor removal), class 2 as ‘maximal CE resection’, class 3 as ‘submaximal CE resection’, and class 4 as ‘biopsy’. We aimed to (I) explore the prognostic role of extent of re-resection using this classification and (II) define clinical factors which consolidate the effects of re-resection. Methods: The RANO resect group retrospectively compiled a global, eight-center cohort of patients with first recurrence from a previously resected glioblastoma. The combined associations of re-resection and clinical factors with outcome were analyzed. Kaplan-Meier survival analysis and log-rank test were applied to calculate survival, and Cox’s proportional hazard regression models to adjust for multiple variables (significance level: p ≤ 0.05). A propensity score-matched analysis was constructed to mimic a randomized clinical trial comparing the different RANO classes. Results: We encountered 681 patients with first recurrence of IDH-wildtype glioblastoma, including 310 patients who underwent re-resection at first recurrence. The use of re-resection was associated with prolonged survival also when stratifying for molecular and clinical confounders on multivariate analysis including pre-operative tumor volume, MGMT promotor status, and non-surgical therapies (HR: 0.65, CI: 0.5-0.8; p = 0.001); and ≤1 cm3 residual CE tumor translated into improved survival compared to non-surgical management. Accordingly, ‘maximal resection’ (class 2) had superior survival compared to ‘submaximal resection’ (class 3) (median OS after recurrence: 12 vs. 9 months; p = 0.003). Adjuvant chemotherapy further augmented the beneficial effects of lower residual CE tumor. Conversely, ‘supramaximal resection’ of non-CE tumor (class 1) was not associated with prolonged survival but frequently accompanied by post-operative deficits, hampering further treatment. The prognostic role of residual CE tumor was confirmed in propensity score analyses. Conclusions: Extent of resection for recurrent glioblastoma as quantified by residual CE tumor is highly prognostic and the RANO resect classification may serve to stratify patients accordingly. Chemotherapy may favorably contribute to the prognostic associations of re-resection. When pursuing resection of non-CE tumor, intraoperative mapping strategies to minimize the risk of post-operative deficits are recommended.

Effectiveness of Spreader Graft Versus Autospreader Flap in Reducing Nasal Air Resistance.

The authors aimed to compare the functional outcomes of 2 different techniques, spreader graft and autospreader flap, by using them for nasal valve surgery in cadavers using acoustic rhinometry (AR). Ten frozen cadavers who underwent nasal valve surgery between May 2017 and August 2018 were randomly divided into 2 groups. Spreader grafts were applied to 10 nasal valve regions in 1 group, while the autospreader flap method was used on the other 10 nasal valve regions. The effectiveness of the surgical techniques was evaluated utilizing AR. We objectively evaluated the effect of surgery on nasal air resistance by comparing the preoperative and postoperative AR values (MCA1, MCA2, volume) in both the spreader graft and the autospreader flap groups. In addition, the differences in nasal potency gain after the application of both techniques were compared and the superiority of the 2 surgeries in terms of functional gains was evaluated. A statistically significant difference was observed in preoperative and postoperative MCA1, MCA2, and volume values in both the techniques and sides. The authors found more significant nasal valve opening for the spreader graft technique using acoustic rhinometric values when compared with the autospreader flap technique. In both methods, the air resistance was observed to decrease objectively in the nasal valve region. Autospreader flaps increase the nasal valve angle without the need for additional cartilage tissue, and it could be an alternative to spreader grafts.

Three-dimensional Reconstruction and Comparison of Temporomandibular Joint Space Volume Before and After Orthognathic Surgery in Patients with Skeletal Class III Malocclusion With Mandibular Deviation.

To look into the association between the degree of deviation and the changing trend in the temporomandibular joint (TMJ) space volume after orthognathic surgery in patients with skeletal Class III malocclusion. Twenty patients having combined orthodontic-orthognathic treatment for skeletal Class III malocclusions with mandibular deviation were chosen, and craniofacial spiral CT was performed before (T0), two weeks after (T1), and six months after (T2) surgery. Using 3D volume reconstruction, further partitioning, and analysis of each domain's volume changes over time, the TMJ space volume is to be obtained. The differences in changes between groups A (mild deviation group) and B (severe deviation group) were examined to examine the impact of the degree of deviation on the TMJ space volume. A statistically significant difference ( P <0.05) existed between the postoperative TMJ space volume in group A and the preoperative overall, anterolateral, and anteroinferior space volume; the same difference also existed between the postoperative TMJ space volume in the NDS and the preoperative posterolateral, posteroinferior space volume. In group B, the postoperative TMJ space volume was statistically significant ( P <0.05) compared with the preoperative total and anteroinferior space volume in the DS; the difference between the total volume of the T1 stage on the NDS and the total volume of the T0 stage was statistically significant ( P <0.05). The two groups showed substantial differences in the space volume changes between the T1-T0 phase and the T2-T1 period. Patients with skeletal Class III malocclusion and mandibular deviation after orthognathic surgery see a change in the TMJ space volume. All patient types experience a largely consistent space volume change trend two weeks after surgery, and the degree of mandibular deviation is correlated with the intensity and longevity of the alteration.

Long-term outcomes of lateral femoral notch after early anterior cruciate ligament reconstruction

To investigate the outcome of lateral femoral notch (LFN) after early anterior cruciate ligament (ACL) reconstruction and evaluate the recovery of knee joint function after the operation. The clinical data of 32 patients who underwent early ACL reconstruction from December 2015 to December 2019 were retrospectively analyzed. The study included 18 males and 14 females, aged 16 to 54 years old, with an average age of (25.39±2.82) years. The body mass index (BMI) of the patients ranged from 20 to 30 kg/cm2, with an average of (26.15±3.09) kg/cm2. Among them, 6 cases were caused by traffic accidents, 19 by exercise, and 7 by the crush of heavy objects. MRI of all patients showed LFN depth was more than 1.5 mm after injury, and no intervention for LFN was performed during surgery. Preoperative and postoperative depth, area, and volume of LFN defects were observed by MRI data. International Cartilage Repair Society (ICRS) score, Lysholm score, Tegner activity levels, and knee injury and osteoarthritis outcome score (KOOS) were analyzed before and after the operation. All patients were followed up from 2 to 6 years with an average of (3.28±1.12) years. There was no significant difference in the defect depth of LFN from (2.31±0.67) mm before the operation to (2.53±0.50) mm at follow-up (P=0.136). The defect area of LFN was decreased from (207.55±81.01)mm2 to (171.36±52.69)mm2 (P=0.038), and the defect volume of LFN was decreased from (426.32±176.54) mm3 to (340.86±151.54)mm3 (P=0.042). The ICRS score increased from (1.51±0.34) to (2.92±0.33) (P<0.001), the Lysholm score increased from (35.37±10.54) to (94.46±8.45) (P<0.001), and the Tegner motor score increased from (3.45±0.94) to (7.56±1.28), which was significantly higher than that of the preoperative data (P<0.001). The KOOS score of the final follow-up was 90.42±16.35. With the increase of recovery time after anterior cruciate ligament reconstruction, the defect area and volume of LFN decreased gradually, but the defect depth remained unchanged. The knee joint function of the patients significantly improved. The cartilage of the LFN defect improved, but the repair effect was not good.

Performance Comparison of Pulmonary Risk Scoring Systems in Lung Resection

To validate and compare the performance of different pulmonary risk scoring systems to predict postoperative pulmonary complications (PPCs) in lung resection surgery. Retrospective cohort study SETTING: A historic single-center cohort of lung resection surgeries PARTICIPANTS: Adult patients undergoing lung resection surgery under 1-lung ventilation. None. The accuracy of the following pulmonary risk scoring systems were used to predict pulmonary complications: the ARISCAT (Assess respiratory RIsk in Surgical patients in CATalonia), the LAS VEGAS (Local Assessment of VEntilatory management during General Anesthesia for Surgery), the SPORC (Score for Prediction of Postoperative Respiratory Complications), and a recent thoracic-specific risk score, named CARDOT. Discrimination and calibration were assessed using the concordance (c) index and the intercept of LOESS (locally estimated scatterplot)-smoothed curves, respectively. Additional models were constructed that incorporated predicted postoperative forced expiratory volume (ppoFEV1) into each scoring system. Of the 2,104 patients undergoing lung surgery, 123 developed postoperative pulmonary complications (PPCs; 5.9%). All scoring systems had poor discriminatory power to predict PPCs (ARISCAT c-index 0.60, 95% confidence interval [CI] 0.55-0.65; LAS VEGAS c-index 0.68, 95% CI 0.63-0.73; SPORC c-index 0.63, 95% CI 0.59-0.68; CARDOT c-index 0.64, 95% CI 0.58-0.70), but the inclusion of ppoFEV1 slightly improved the performance of LAS VEGAS (c-index 0.70, 95% CI 0.66-0.75) and CARDOT (c-index 0.68, 95% CI 0.62-0.73). Analysis of calibration showed a slight overestimation when using ARISCAT (intercept -0.28) and LAS VEGAS (intercept -0.27). None of the scoring systems appeared to have adequate discriminatory power to predict PPCs among patients undergoing lung resection. An alternative risk score is necessary to better predict patients at risk of PPCs after thoracic surgery.

The efficacy and safety of intravenous administration of tranexamic acid in patients undergoing cardiac surgery: Evidence from a single cardiovascular center.

The current study was performed to systemically review the efficacy and safety of tranexamic acid (TXA) in patients undergoing cardiac surgery at a single large-volume cardiovascular center. A computerized search of electronic databases was performed to identify all relevant studies using search terms till December 31st, 2021. The primary outcomes were postoperative blood loss and the composite incidence of mortality and morbidities during hospitalization. Secondary outcomes included postoperative massive bleeding and transfusion, postoperative recovery profiles, coagulation functions, inflammatory variables, and biomarkers of vital organ injury. Database search yielded 23 qualified studies including 27,729 patients in total. Among them, 14,136 were allocated into TXA group and 13,593 into Control group. The current study indicated that intravenous TXA significantly reduced total volume of postoperative bleeding in both adult and pediatric patients, and that medium- and high-dose TXA were more effective than low-dose TXA in adult patients (P < .05). The current study also demonstrated that intravenous TXA, as compared to Control, remarkably reduced postoperative transfusion incidences and volume of red blood cell and fresh frozen plasma, and reduced postoperative transfusion incidence of platelet concentrates (PC) (P < .05) without obvious dose-effects (P > .05), but TXA did not reduce PC transfusion volume postoperatively in adult patients (P > .05). For pediatrics, TXA did not significantly reduce postoperative transfusion incidence and volume of allogenic red blood cell, fresh frozen plasma and PC (P > .05). Additionally, the current study demonstrated that intravenous TXA did not influence the composite incidence of postoperative mortality and morbidities in either adults or pediatrics during hospitalization (P > .05), and that there was no obvious dose-effect of TXA in adult patients (P > .05). This current study suggested that intravenous TXA significantly reduced total volume of postoperative bleeding in both adult and pediatric patients undergoing cardiac surgery at the single cardiovascular center without increasing the composite incidence of mortality and morbidities.

Minimally Invasive Intracerebral Hemorrhage Evacuation Improves Pericavity Cerebral Blood Volume.

Cerebral blood volume mapping can characterize hemodynamic changes within brain tissue, particularly after stroke. This study aims to quantify blood volume changes in the perihematomal parenchyma and pericavity parenchyma after minimally invasive intracerebral hemorrhage evacuation (MIS for ICH). Thirty-two patients underwent MIS for ICH with pre- and post-operative CT imaging and intraoperative perfusion imaging (DynaCT PBV Neuro, Artis Q, Siemens). The pre-operative and post-operative CT scans were segmented using ITK-SNAP software to calculate hematoma volumes and to delineate the pericavity tissue. Helical CT segmentations were registered to cone beam CT data using elastix software. Mean blood volumes were computed inside subvolumes by dilating the segmentations at increasing distances from the lesion. Pre-operative perihematomal blood volumes and post-operative pericavity blood volumes (PBV) were compared. In 27 patients with complete imaging, post-operative PBV significantly increased within the 6-mm pericavity region after MIS for ICH. The mean relative PBV increased by 21.6 and 9.1% at 3 mm and 6 mm, respectively (P = 0.001 and 0.016, respectively). At the 9-mm pericavity region, there was a 2.83% increase in mean relative PBV, though no longer statistically significant. PBV analysis demonstrated a significant increase in pericavity cerebral blood volume after minimally invasive ICH evacuation to a distance of 6 mm from the border of the lesion.

Combined use of intraoperative MRI and awake tailored microsurgical resection to respect functional neural networks: preliminary experience.

The combined use of intraoperative MRI and awake surgery is a tailored microsurgical resection to respect functional neural networks (mainly the language and motor ones). Intraoperative MRI has been classically considered to increase the extent of resection for gliomas, thereby reducing neurological deficits. Herein, we evaluated the combined technique of awake microsurgical resection and intraoperative MRI for primary brain tumours (gliomas, metastasis) and epilepsy (cortical dysplasia, non-lesional, cavernomas). Eighteen patients were treated with the commonly used "asleep awake asleep" (AAA) approach at Lille University Hospital, France, from November 2016 until May 2020. The exact anatomical location was insular with various extensions, frontal, temporal or fronto-temporal in 8 (44.4%), parietal in 3 (16.7%), fronto-opercular in 4 (22.2%), Rolandic in two (11.1%), and the supplementary motor area (SMA) in one (5.6%). The patients had a mean age of 38.4 years (median 37.1, range 20.8-66.9). The mean surgical duration was 4.1 hours (median 4.2, range 2.6-6.4) with a mean duration of intraoperative MRI of 28.8 minutes (median 25, range 13-55). Overall, 61% (11/18) of patients underwent further resection, while 39% had no additional resection after intraoperative MRI. The mean preoperative and postoperative tumour volumes of the primary brain tumours were 34.7 cc (median 10.7, range 0.534-130.25) and 3.5 cc (median 0.5, range 0-17.4), respectively. Moreover, the proportion of the initially resected tumour volume at the time of intraoperative MRI (expressed as 100% from preoperative volume) and the final resected tumour volume were statistically significant (p= 0.01, Mann-Whitney test). The tumour remnants were commonly found posterior (5/9) or anterior (2/9) insular and in proximity with the motor strip (1/9) or language areas (e.g. Broca, 1/9). Further resection was not required in seven patients because there were no remnants (3/7), cortical stimulation approaching eloquent areas (3/7) and non-lesional epilepsy (1/7). The mean overall follow-up period was 15.8 months (median 12, range 3-36). The intraoperative MRI and awake microsurgical resection approach is feasible with extensive planning and multidisciplinary collaboration, as these methods are complementary and synergic rather than competitive to improve patient oncological outcomes and quality of life.