Objective To explore the application value of Mimics 3D reconstruction technology combined with Hookwire localization in video-assisted thoracoscopic surgery(VATS)for pulmonary nodules.Methods A total of 100 patients with pulmonary nodules who underwent VATS at Jinhua Hospital Affiliated to Zhejiang University School of Medicine(Jinhua City Central Hospital)from June 2022 to June 2023 were selected as research subjects.The patients were divided into control group(n=51)and observation group(n=49)based on different localization methods.The observation group used Mimics 3D reconstruction technology combined with Hookwire intervention,while control group used methylene blue localization intervention.The surgical outcomes of both groups were compared.Results The operation time,nodule resection start time and hospital stay of patients in observation group were shorter than those in control group,and the intraoperative bleeding volume and hospitalization cost were less than those in control group(P＜0.05).The incidence of postoperative complications of patients in observation group was lower than that in control group(P＜0.05).Conclusion The combination of Mimics 3D reconstruction and Hookwire localization in patients with pulmonary nodules VATS can shorten the operation time,reduce the damage to lung function and improve the safety of surgery.

Objective To explore the application value of Mimics 3D reconstruction technology combined with Hookwire localization in video-assisted thoracoscopic surgery(VATS)for pulmonary nodules.Methods A total of 100 patients with pulmonary nodules who underwent VATS at Jinhua Hospital Affiliated to Zhejiang University School of Medicine(Jinhua City Central Hospital)from June 2022 to June 2023 were selected as research subjects.The patients were divided into control group(n=51)and observation group(n=49)based on different localization methods.The observation group used Mimics 3D reconstruction technology combined with Hookwire intervention,while control group used methylene blue localization intervention.The surgical outcomes of both groups were compared.Results The operation time,nodule resection start time and hospital stay of patients in observation group were shorter than those in control group,and the intraoperative bleeding volume and hospitalization cost were less than those in control group(P＜0.05).The incidence of postoperative complications of patients in observation group was lower than that in control group(P＜0.05).Conclusion The combination of Mimics 3D reconstruction and Hookwire localization in patients with pulmonary nodules VATS can shorten the operation time,reduce the damage to lung function and improve the safety of surgery.

Objective:To explore the methods and clinical effects of reconstructing facial and cervical scars with expanded flaps based on the "MLT" principle.Methods:The study was a retrospective observational study. From January 2019 to May 2022, 74 patients with facial and cervical scars after burn or trauma injuries who met the inclusion criteria were admitted to Xiangya Hospital of Central South University, including 38 males and 36 females, aged from 5 to 58 years, including 24 patients with simple facial involvement, 24 patients with simple cervical involvement, and 26 patients with both facial and cervical involvement, with scar area ranging from 12 to 145 cm2. By following the "MLT" principle (color and texture similar to the face; flap area large enough to reconstruct the entire defect; skin tissue thin enough to transmit the expression, so as to facilitate the shape of the face and five features); in the stage Ⅰ surgery, the skin and soft tissue expanders (hereinafter referred to as the expanders) were implanted, and in the stage Ⅱ surgery, the expander removal+scar resection+flap transplantation to repair the secondary wound was performed, and the wound in the donor area of flap was directly sutured. After operation, silicone gel preparation and laser therapy were used to prevent scar hyperplasia. The expansion ratio and time period of expanders, the occurrence of complications of skin and soft tissue expansion surgery, the type of flap used, and the survival of flap after the stage Ⅱ surgery were observed and recorded. The long-term effect of facial and cervical reconstruction and the recovery of donor area and recipient area of flap were evaluated during the postoperative follow-up after surgery.Results:The expansion ratio of 135 expanders ranged from 1.36 to 3.00 times, and the expansion time period ranged from 6 to 14 months. During skin and soft tissue expansion surgery, 8 patients had poor healing of incisions after expander placement, 7 patients had expander rupture, 5 patients had infection in incisions after expander placement, 3 patients had expander exposure, 2 patients had difficult filling the injection pot, and 1 patient had water leakage from the injection pot. Dorsal shoulder expanded flaps with double blood supply of transverse cervical artery and circumflex scapular artery were used in 8 patients, the expanded flaps of anterior transverse carotid artery perforator were used in 11 patients, the expanded flaps of internal thoracic artery perforator were used in 12 patients, tandem expanded flaps of upper chest and neck were used in 16 patients, dorsal thoracic artery perforator expanded flaps were used in 5 patients, and adjacent rotary propulsive expanded flaps were used in 22 patients. After the stage Ⅱ surgery, the flaps of 71 patients were completely survived. One patient had blood circulation disorder in the flap, and the flap survived after hyperbaric oxygen treatment. Necrosis occurred at the end of the flaps in 2 patients, which healed after dressing change. After the surgery, 42 patients were followed up for 3 to 24 months. The color, texture, and thickness of flaps were good and similar to the surrounding normal skin tissue in the recipient area, the appearance and function of the face and neck were significantly improved, and the wound location in the donor and recipient areas of flaps was concealed with slight scar formation.Conclusions:In the reconstruction of facial and neck scars, by following the "MLT" principle, the expanded flap was carefully designed before surgery, the local aesthetic features within the subunit are reconstructed during the stage Ⅱ surgery, and standard anti-scar treatment measures are actively adopted after surgery. After reconstruction, the color, texture, and thickness of flaps were close to the normal skin in face and neck, and the appearance and function of face and neck are significantly improved, with less linear scars left. It is beneficial to improve the therapeutic effect.

Objective:To explore the repair methods of complex facial defect wounds involving paranasal sinuses and their clinical effectiveness.Methods:A retrospective observational study was conducted. From January 2020 to May 2022, 5 patients admitted to the Department of Burns and Plastic Surgery of Xiangya Hospital of Central South University and 4 patients admitted to the Department of Burns and Plastic Surgery of Chenzhou First People's Hospital with complex facial defect wounds involving paranasal sinuses met the inclusion criteria, including 6 males and 3 females, aged 35-69 years, including 4 patients with titanium mesh exposure combined with paranasal sinuses injury and 5 patients with tumor involving paranasal sinuses. After an adequate assessment of the damage by a multiple discipline team, titanium mesh removal, paranasal sinus debridement, and paranasal sinus mucosa removal were performed in patients with exposed titanium mesh, and radical tumor resection was performed in patients with tumors, with postoperative skin and soft tissue defects areas of 5.0 cm×2.5 cm to 18.0 cm×7.0 cm, anterior paranasal sinus wall defects/absence areas of 3 cm×2 cm to 6 cm×4 cm, and sinus cavity depths of 1 to 4 cm. Depending on the perforator course of the descending branch of the lateral circumflex femoral artery, the anterolateral femoral chimeric flap or anterolateral femoral myocutaneous flap (with flap area of 9 cm×4 cm to 19 cm×8 cm, muscle size of 5 cm×3 cm×3 cm to 11 cm×6 cm×3 cm) was transplanted to repair the defect, and the donor site wound was sutured directly. The type of tissue flap transplanted, the blood vessel of the recipient area, and the vascular anastomosis way during the operation, the recovery of the donor and recipient areas and the occurrence of complications after operation were observed. The appearance and blood supply of the recipient area and the recurrence of ulcers and tumors were followed up.Results:The anterolateral femoral myocutaneous flap transplantation was performed in 6 patients, and the anterolateral femoral chimeric flap transplantation was performed in 3 patients. The blood vessels in recipient areas were facial arteries and veins in 3 cases and superficial temporal arteries and veins in 6 cases. The superficial temporal arteries and veins were bridged with blood vessels in tissue flaps by flow-through way in 2 patients, and end-to-end anastomosis of blood vessels in donor and recipient areas was performed in 7 patients. After operation, all the tissue flaps survived, and the facial defect wounds were well repaired without cerebrospinal fluid leakage or paranasal sinus secretion leakage, no intracranial infection occurred, and the wounds in donor areas were healed well. Follow-up of 6-35 months after operation showed that all the patients had good blood supply in the recipient area, and the shape was acceptable; 4 patients with exposed titanium mesh had no recurrence of ulceration, and 5 patients with tumor had no local tumor recurrence or metastasis.Conclusions:Based on an adequate assessment of the extent of paranasal sinuses involved in the facial wound and the nature of the defect, good clinical effects can be achieved by using the anterolateral femoral muscle flap or the anterolateral femoral chimeric flap transplantation to repair complex facial defect wounds with open paranasal sinuses.

Objective:To explore the repair methods and clinical effects of full-thickness burn wounds deep to tendon or even bone in fingers.Methods:A retrospective non-randomized controlled trial was conducted on the 98 patients with full-thickness finger burns deep to tendon or even bone who met the inclusion criteria and were hospitalized in Xiangya Hospital of Central South University from January 2010 to December 2019. Among the 98 patients, there were 81 males and 17 females, aged from 1 to 72 years, with 160 fingers involved. The wound area of each of affected fingers ranged from 2.0 cm×1.5 cm to 12.0 cm×3.5 cm, and the maximum wound area after merging the affected fingers was 12.0 cm×10.0 cm. For adult hands with multiple full-thickness burn wounds deep to tendon or even bone in multiple fingers or children with full-thickness finger burns deep to tendon or even bone, pedicled abdominal flaps were selected. For adults with single or two fingers with full-thickness burns deep to tendon or even bone, the pedicled internal hand flaps and free tissue flaps were selected. The free tissue flap repair requires good vascular conditions in the recipient area with arteries and veins available for anastomosis. For thumb nail burns deep to tendon or even bone or partial absence of the thumb after burns, the thumbs were reconstructed with the first toenail flap or dorsal foot flap with the second toe. In this study, 45 pedicled abdominal flaps were used to repair the wounds in 91 fingers, 37 pedicled internal hand flaps were used to repair the wounds in 37 fingers, 26 free tissue flaps were used to repair the wounds in 28 fingers, 3 first toenail flaps were used to reconstruct 3 patients' thumb nails and to repair hand wounds, and 1 dorsal foot flap with the second toe was used to reconstruct 1 patient's thumb and to repair hand and wrist wounds. The tissue flap area was from 2.0 cm×1.5 cm to 20.0 cm×10.0 cm. The wound in the donor site was repaired by direct suture or full-thickness skin grafting from the medial upper arm of the affected limb or split-thickness skin grafting from the outer thigh. The postoperative survival of the tissue flap, postoperative complications, and appearance and function of the flap donor site were observed. For the patients who were followed up, their finger functions were evaluated at the last follow-up using the trial criteria for replantation function evaluation of the amputated finger issued by the Hand Surgery Society of the Chinese Medical Association, and the satisfaction of the patients was investigated using the Efficacy Satisfaction Scale. Data were statistically analyzed with Kruskal-Wallis H test and Nemenyi test. Results:Of the 112 tissue flaps, 104 tissue flaps survived completely and had good blood circulation; 1 pedicled thumb dorsal ulnar reverse island flap, 1 pedicled finger artery cutaneous branch reverse island flap, and 1 free grafted anterolateral thigh perforator flap were slightly necrotic at the end, which were repaired with outer thigh split-thickness skin graft after dressing change and granulation tissue growth; 2 free grafted tarsal external artery flaps and 1 pedicled thumb dorsal ulnar reverse island flap suffered from postoperative venous return obstruction, which survived after partial suture removal and heparin saline cleansing of the wound; 1 pedicled modified dorsal metacarpal artery retrograde island flap and 1 free grafted peroneal artery perforator flap were necrotic, which were repaired by a pedicled abdominal flap and a lateral upper arm flap free transplantation respectively in stage Ⅱ. After transplantation, the tissue flaps had good shape, soft texture, and good elasticity, without bloating. There was no functional disorder in the flap donor site, and only slight scar remained. A total of 117 fingers of the 72 patients received 3-24 months of outpatient or telephone follow-up. At the last follow-up, the excellent and good rates of function evaluation of fingers repaired with pedicled abdominal flap, pedicled internal hand flap, and free tissue flap were respectively 77.3% (51/66), 96.3% (26/27), and 95.8% (23/24). The function of fingers repaired with free tissue flap and pedicled internal hand flap was significantly better than that with pedicled abdominal flap ( P<0.01). The satisfaction of patients with fingers repaired by free tissue flaps was significantly higher than that by pedicled abdominal flap ( P<0.05). Conclusions:According to the specific situation of full-thickness burn wounds deep to tendon or even bone in fingers, the pedicled abdominal flap is used to repair the multiple full-thickness burn wounds deep to tendon or even bone in multiple fingers of adult or the full-thickness burn wounds deep to tendon or even bone in fingers of children, the pedicled internal hand flap or free tissue flap is used to repair the full-thickness burn wounds deep to tendon or even bone in single or two fingers of adult patients, and the first toenail flap or the dorsal foot flap with the second toe is used to reconstruct the thumbs with full-thickness burn deep to tendon or even bone, with high postoperative tissue flap survival rate and few complications. The functional recovery of the affected finger is better after repair with free tissue flap and pedicled internal hand flap, and the patients' satisfaction is the highest after free tissue flap repair.

Poststroke recrudescence (PSR) is a reappear phenomenon in the neurological symptoms of chronic stroke in the setting of toxic metabolic factors. Infection, hyponatremia, and use of benzodiazepine are important precipitants. In this paper, the risk factors, pathogenesis, clinical characteristics, diagnosis and treatment methods of PSR are reviewed to enhance the understanding of the disease among clinicians.

Objective:To explore the clinical effects of simultaneous reconstruction of multiple joint scar contracture deformity of limb.Methods:From January 2010 to June 2018, 24 patients with multiple joint scar contracture deformity of the same limb were reconstructed in simultaneous operations in Xiangya Hospital of Central South University, including 16 males and 8 females, aged 3-42 years, with 15 patients having deformities in the upper limbs and 9 patients having deformities in the lower limbs. One operation was performed to repair contracture deformity of axillary fossa and elbow in 3 patients, cubital fossa and palmar of wrist in 4 patients, cubital fossa and hand in 5 patients, palmar of wrist, palm, and palmar of finger in 3 patients, groin and medial knee in 2 patients, popliteal fossa and posterior ankle in 1 patient, and anterior ankle and dorsum of foot in 6 patients. After the release of various joint scar contractures, the area of skin defect was 140 to 580 cm 2. Autologous full-thickness skin grafts were used in 7 patients, autologous medium-thickness skin grafts were used in 4 patients, autologous full-thickness skin grafts combined with local skin flaps were used in 9 patients, and allogeneic acellular dermal matrix and autologous thin skin grafts were used in 4 patients. Comprehensive measures for rehabilitation were taken and the survival of the skin graft was observed after operation. Six months to eight years after the operation, all the patients were followed up for the functions of the affected limbs, among which the functions of the upper limbs were evaluated according to the trial standard for the evaluation of the functions of the upper limbs of the Hand Surgery Society of the Chinese Medical Association. The joint mobility, walking, and squatting function of lower extremity were examined after operation. Recurrence of contractures in all the affected limbs and reoperation were recorded. Results:The grafts survived after operation in 22 patients. Two patients had necrosis in small full-thickness skin area, of which one was healed by skin grafting after debridement, and the other one was healed after dressing changes. The deformity of scar contracture at each repaired joint was completely or partially corrected. During a follow-up for 6 to 96 months, the upper limb functions of 15 patients were rated excellent in 12 patients and good in 3 patients. Among the 9 patients of lower limb scar contractures, except for one 3-year-old child who experienced recurrence of medial knee scar contracture and underwent surgical release and skin grafting 5 years later, the remaining 8 patients basically recovered normal joint functions with pretty good outcomes.Conclusions:For continuous scar contracture deformity of multiple joints of the same limb, simultaneous surgical release and skin grafting can reduce operation frequency and obtain better outcomes of surgical operation.

Objective:To establish an artificial intelligence burn depth recognition model based on convolutional neural network, and to test its effectiveness.Methods:In this evaluation study on diagnostic test, 484 wound photos of 221 burn patients in Xiangya Hospital of Central South University (hereinafter referred to as the author′s unit) from January 2010 to December 2019 taken within 48 hours after injury which met the inclusion criteria were collected and numbered randomly. The target wounds were delineated by image viewing software, and the burn depth was judged by 3 attending doctors with more than 5-year professional experience in Department of Burns and Plastic Surgery of the author′s unit. After marking the superficial partial-thickness burn, deep partial-thickness burn, or full-thickness burn in different colors, the burn wounds were cut according to 224×224 pixels to obtain 5 637 complete wound images. The image data generator was used to expand images of each burn depth to 10 000 images, after which, images of each burn depth were divided into training set, verification set, and test set according to the ratio of 7.0∶1.5∶1.5. Under Keras 2.2.4 Python 2.8.0 version, the residual network ResNet-50 of convolutional neural network was used to establish the artificial intelligence burn depth recognition model. The training set was input for training, and the verification set was used to adjust and optimize the model. The judging accuracy rate of various burn depths by the established model was tested by the test set, and precision, recall, and F1_score were calculated. The test results were visualized to generate two-dimensional tSNE cloud chart through the dimensionality reduction tool tSNE, and the distribution of various burn depths was observed. According to the sensitivity and specificity of the model for the recognition of 3 kinds of burn depths, the corresponding receiver operator characteristics (ROC) curve was drawn, and the area under the ROC curve was calculated.Results:(1) After the testing of the test set, the precisions of the artificial intelligence burn depth recognition model for the recognition of superficial partial-thickness burn, deep partial-thickness burn, or full-thickness burn were 84% (1 095/1 301), 81% (1 215/1 499) and 82% (1 395/1 700) respectively, the recall were 73% (1 095/1 500), 81% (1 215/1 500) and 93% (1 395/1 500) respectively, and the F1_scores were 0.78, 0.81, and 0.87 respectively. (2) tSNE cloud chart showed that there was small overlapping among different burn depths in the test results for the test set of artificial intelligence burn depth recognition model, among which the overlapping between superficial partial-thickness burn and deep partial-thickness burn and that between deep partial-thickness burn and full-thickness burn were relatively more, while the overlapping between superficial partial-thickness burn and full-thickness burn was relatively less. (3) The area under the ROC curve for 3 kinds of burn depths recognized by the artificial intelligence burn depth recognition model was ≥0.94.Conclusions:The artificial intelligence burn depth recognition model established by ResNet-50 network can rather accurately identify the burn depth in the early wound photos of burn patients, especially superficial partial-thickness burn and full-thickness burn. It is expected to be used clinically to assist the diagnosis of burn depth and improve the diagnostic accuracy.

Objective To study the relation between the expression of P130 Crk-associated substrate (P130Cas),phosphatase and tensin homolog (PTEN)and the epithelial-mesenchymal transition (EMT) of skin scar carcinoma.Methods Tissues of skin scar carcinoma,scar and normal skin were collected from 8 patients who were pathologically diagnosed as skin scar carcinoma with high differentiated squamous cell carcinoma.The expression of PTEN,P130Cas,E-cadherin and Vimentin in normal skin,skin scar and skin scar carcinoma tissues were detected by immunohistochemical method of S-P.Results The expression of PTEN,P130Cas and E-cadherin in normal skin,scar and skin scar carcinoma tissues were all significantly different (P ＜ 0.05).The expression of Vimentin in skin scar carcinoma tissues were significantly increased than that in normal skin and skin scar tissues,but there was no statistically significance difference between skin scar tissues and normal skin (P ＞ 0.05).The expression of PTEN in skin scar carcinoma tissues was negatively correlated with P130Cas (r =-0.78,P =0.023) and positively correlated with E-cadherin (r =0.83,P =0.011),but there were no correlation between PTEN and Vimentin (P ＞ 0.05);The expressions of P130Cas in skin scar carcinoma tissues was negatively correlated with Ecadherin (r =-0.74,P =0.035),but there were no statistically significant correlation between P130Cas and Vimentin (P＞0.05).Conclusions Both PTEN and P130Cas involved in the EMT process of skin scar carcinoma and may be an important mechanism in scar carcinogenesis.

Objective: To investigate the effect of different negative pressure of wound negative pressure dressing (NPD) on the survival of full-thickness skin grafts of patients. Methods: One hundred and eleven patients who need skin grafting, conforming to the inclusion criteria were hospitalized in our unit from August 2012 to March 2017, and their clinical data were retrospectively analyzed. Forty-seven patients hospitalized from August 2012 to October 2015 were assigned into traditional treatment group. Sixty-four patients hospitalized from November 2015 to March 2017 were divided into -9.975 kPa negative pressure treatment group (n=34) and -13.300 kPa negative pressure treatment group (n=30). Patients in traditional treatment group received conventional dressing after full-thickness skin grafting. Patients in -9.975 kPa and -13.300 kPa negative pressure treatment groups received -9.975 kPa and -13.300 kPa NPD based on traditional treatment after vacuum sealing, respectively. Dot necrosis area of skin grafts and erosion and escharosis of graft edges of patients in the three groups on post operation day 10 were observed. The percentage of dot necrosis area of skin grafts and occurrence rate of erosion and escharosis of skin graft edges were calculated, respectively. Data were processed with chi-square test, Fisher′s exact test, and Kruskal-Wallis H test. Results: Percentages of dot necrosis area of skin grafts of patients in traditional treatment group and -9.975 kPa and -13.300 kPa negative pressure treatment groups were 17.81%, 3.20%, and 3.00%, respectively. Percentage of dot necrosis area of skin grafts of patients in traditional treatment group was significantly higher than that in -9.975 kPa and -13.300 kPa negative pressure treatment groups (Z=-5.770, -4.690, P<0.001). Percentages of dot necrosis area of skin grafts of patients in -9.975 kPa and-13.300 kPa groups were close (Z=-0.619, P>0.05). The occurrence rates of erosion and escharosis of skin graft edges of patients in traditional treatment group and -9.975 kPa and -13.300 kPa negative pressure treatment groups were 78.7% (37/47), 32.4 (11/34), and 36.7% (11/30), respectively. Erosion and escharosis of skin graft edges of patients in -9.975 kPa and -13.300 kPa negative pressure treatment groups were better than those in traditional treatment group (P<0.001). Erosion and escharosis of skin graft edges of patients in -9.975 kPa and -13.300 kPa negative pressure treatment groups were close (P>0.05). Conclusions The use of -9.975 kPa and -13.300 kPa NPD in skin grafts after full-thickness skin grafting significantly diminishes the occurrence rates of dot necrosis area of skin grafts and erosion and escharosis of graft edges.