In the present paper, the contribution of the largest principal component and the number of principal component needed for accumulative contribution 95% are selected as indices of electroencephalogram (EEG) in mental fatigue state in order to investigate the relationship between these parameters and mental fatigue. The experimental results showed that the contribution of the largest principal component of EEG signals increased in the prefrontal, frontal and central areas, while the number of principal component needed for accumulative contribution decreased by 95% with the increasing mental fatigue level. The parameters of singular system of EEG signals can be regarded as useful features for the estimation of mental fatigue and have larger application value in the study of mental fatigue.
Electroencephalography ; Humans ; Mental Fatigue ; Principal Component Analysis

Frey's syndrome is a fairly common sequelae of surgery, trauma and inflammation of the parotid gland. Some patients with Frey's syndrome may be socially compromised by their gustatory sweating and flushing. In the past three decades, a variety of surgical and pharmacological methods have been unsuccessful in alleviating these symptoms. And since misdirection of auriculotemporal secretomotor nerve fibers has been found to play an important role in the development of the syndrome, a study was initiated to attempt mechnical interference with regenerating nerve fibers. Therefore, the recent trend in management of Frey's syndrome has been the use of prophylactic procedures performed at the time of parotidectomy to prevent its symptoms postoperatively. An additional benefit of this approach is prevention of the typical cheek contour deformity after parotidectomy We reviewed our experience with interposition of a vascularized temporoparietal fascial flap between the parotid bed and overlying skin immediately after complete superficial parotidectomies to prevent Frey's syndrome and hollow contour defects. The result of seven consecutive attempts revealed it to be an effective technique, achieving both goals in all patients with minimal morbidity.
Cheek ; Congenital Abnormalities ; Flushing ; Humans ; Inflammation ; Nerve Fibers ; Parotid Gland ; Skin ; Sweating, Gustatory

No abstract available.
Leg*

No abstract available.
Leg* ; Myocutaneous Flap* ; Superficial Back Muscles*

Many plastic surgeons have been tried to attain ultimate goal lies in restoring the original shape and function of the facial aesthetics, in reconstruction of deformities resulting from facial hypertrophic scar and skin defects. This would require consideration in terms of hanmony in color match, skin texture and thickness. Various forms of skin graft, local flap, distant flaps, free flap and tissue expander have been employed in restoring skin defects and deformities of the cheek and submental area, and the use of large local flaps utilizing the cervicofacial skin flaps or tissue expander have brought about improved aesthetic results. the authers have obtained satisfactory results in treating 2 cases of wide hypertrophic scar of the cheek and submental area with combination of wide cervical flap and intraoperative tissue expansion using foley catheter. the merits of this combined operative methods are as follows : 1. It is not necessory to keep tissue expander for a long period. 2. This technique is able to diminish the cost of multistage operation and using of tissue expander. 3. There is no psychologic problems due to undesirable facial appearance during tissue expansion period. 4. Rapid intraoperative tissue expansion by foley catheter during elevating wide cervical flap can allow to dissect one, preserving the perforators without bleeding in a short time. 5. Wide cervical flap and additional expanded tissue by means of intraoperative tissue expansion could brought into suturing avoiding tension of oral commissure and lip eversion. 6. Preservation of perforators of cervical flap above the platysma muscle raised flap's survival rate and then this result could prevent distal ischemic necrosis after flap coverage.
Catheters ; Cheek ; Cicatrix, Hypertrophic* ; Congenital Abnormalities ; Esthetics ; Free Tissue Flaps ; Hemorrhage ; Lip ; Necrosis ; Skin ; Survival Rate ; Tissue Expansion Devices ; Tissue Expansion* ; Transplants

Objective A prospective randomized controlled trial was carried out to explore the best time of In-domethacin suppositories administration for the prevention of post-ERCP pancreatitis in high-risk groups. Methods 81 patients were enrolled in the study finally. Patients were randomized into group A (100 mg rectal Indomethacin suppositories was administrated immediately after ERCP), group B (100 mg rectal Indomethacin suppositories was administrated half an hour after ERCP) and group C (ERCP alone group, which did not give Indomethacin supposito-ries). The level of serum amylase, urine amylase, serum CRP, serum IL-6, serum TNF-α were measured before, 3 h, 24 h and 48 h after ERCP, and the incidence of PEP and hyperamylasemia were analyzed. Results There was 1 case (4.00%) of PEP in group A, 2 cases (5.41%) of PEP in group B and 5 cases (26.31%) of PEP in group C;the incidences of PEP of group A and group B were significant lower than that in group C (P < 0.05). There was 1 case (4.00%) of hyperamylasemia in group A, 5 cases (13.51 %) of hyperamylasemia in group B and 6 cases (31.6 %) of hyperamylasemia in group C, and the incidences of hyperamylasemia of group A and group B were significant lower than that in group C ( P< 0.05). Conclusion Administration of 100 mg Indomethacin suppositories immediately or half an hour after ERCP can effectively reduce the incidence of PEP and hyperamylasemia.

The Flow cytometric analysis of DNA in tumors have been reported to reflect the cellular activities and proliferative rates. Currently, it has been used to predict the prognosis and responsiveness of tumors to various modality of therapy. The author analyzed thirty seven meningiomas(7 syncytial, 9 transitional, 6 fibroblastic, 9 angioblastic, 6 atypical) using paraffinembeddede tissues. The ploidy pattern and relative value(%) in the GO/GI, S, and G2/M phases were calculated for each specimen. In our series, All were diploid types except 6 meningiomas(2 syncytial, 2 angioblastic, 2 atypical). Diploidy with weak tetraploidy(upto 10%) was found in 8 cases(40% of atypical, 33% of fibrobiastic and transitional) but not in syncytial meningioma. Diploidy with strong teraploigy(10-25%) was found in 1 transitional, 1 angioblastic meningioma. There was wide variation in 4C values even in the same subgroups of meningiomas. The distribution of P. I values is even and lower especially in fibroblastic meningiomas. On the contrary, the distribution of P. I values is relatively uneven and highly variable in other types of meningiomas & even in the same subgroups of meningiomas except fibroblastic meningioma. The prediction of recurrences in operated cases remained further investigation due to lack of long-term follow-up.
Diploidy ; DNA* ; Fibroblasts ; Flow Cytometry ; Meningioma* ; Ploidies ; Prognosis ; Recurrence

No abstract available.
Antistreptolysin* ; Child* ; Humans ; Reference Values* ; Seoul*

Objective To investigate the clinical characteristics, diagnosis and treatment of acute mesenteric venous thrombosis(MVT) in the elderly. Methods The clinical features, diagnosis, treatments and prognosis of 10 aged cases with acute MVT were retrospectively analyzed. Results The chief complaints of the 10 cases were different degrees of abdominal pain, which not paralleled with abdominal signs. The accompanying symptoms were nausea, vomiting and bloody stools and so on. All of these patients were misdiagnosised as pancreatitis, appendicitis or intestinal obstruction and so on. diagnosis of two cases was confirmed by ultrasound, 8 by CT. At the same time, 2 cases underwent angiography examination. Of the 8 cases who underwent operation, 5 cases were cured, 3 cases died (1 died of toxic shock and 2 died of multiple organ failure ). Two cases underwent conservative intervention thrombolysis. Conclusions It is essential to improve the knowledge of acute MVT,especially its intricate clinical characteristics, high rates of misdiagnosis and mortality. Early proper diagnosis is crucial. The main treatment is operation and conservative intervention thrombolysis can be performed in the patients whose bowel has not necrosed yet.

OBJECTIVESTo observe the vaporesection efficiency of the 2 micron laser to the prostatic gland in benign prostatic hyperplasia, and investigate the method of estimating the amount of the vaporesected prostatic tissues during transurethral vaporesection of the prostate using the 2 micron laser system in the treatment of benign prostatic hyperplasia.

METHODSTotal 9 fresh prostatic gland specimens were obtained from patients with BPH under open surgical procedures, and vaporesected under a simulated transurethral environment with the 2 micron laser system immediately after weighted. Energies and time consumptions were noted, collections of vaporesected tissue specimens and the remnants of the prostatic glands were weighted after the procedures. The ratios of the vaporized tissues and the collected tissues to the whole vaporesected tissues were calculated respectively. The vaporesection efficiency of the 2 micron laser to the prostatic tissues was also calculated.

RESULTSAmong the total lost tissues, about (65.6 +/- 1.5) percent of which were that of vaporized, and nearly (34.5 +/- 1.5) percent were resected. Linear correlation between the weight of collected prostatic tissue(x) and the weight of prostatic gland specimens(y) could be defined as a formula of [y = 3.245x - 6.475 (t = 15.097, P = 0.000)].

CONCLUSIONThe amounts of the whole prostatic tissues removed by the 2 micron laser could be calculated from the collected resected prostatic specimens under a simulated transurethral surgical procedure.

Humans ; In Vitro Techniques ; Laser Therapy ; methods ; Lasers ; Male ; Prostate ; surgery ; Prostatic Hyperplasia ; surgery ; Transurethral Resection of Prostate ; methods