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At least 613 records · Page 34Linked to original sources
PubMed1996

Free medial thigh perforator-based flaps: new definition of the pedicle vessels and versatile application.

The medial thigh flap is a perforator-based flap nourished with septocutaneous or muscle perforators originating from the femoral vessels. To date, 8 patients have been repaired with this flap and extended or connected flaps including this flap: 4 patients with lower leg defects and 4 patients with intraoral and neck defects. The advantages of this flap are (1) several pedicle perforators exist for this flap, which makes possible duplicated vascular anastomoses to establish reliable circulation of the transferred flap; (2) the flap can be extended or connected to other neighboring flaps in the anterior thigh, so that extensively wide defects can be closed in one stage; (3) the great saphenous vein can be simultaneously used as a vein graft or for venous drainage for the flap; (4) the anterior branch of the femoral nerve can be used for sensory potential; and (5) there is minimum morbidity of the donor defect and a large dominant vessel for the leg can be preserved. The suitable indications for this flap are defects after removal of skin cancer in the foot or lower leg and wide defects after resection of head and neck cancer, which can be reconstructed with the flap connected to neighboring skin flaps. The disadvantages of this flap are that it has a small, short vascular pedicle and the bulkiness of the flap's fatty tissue often requires thinning.

Aged↗
PubMed2003

Vulvo-perineal reconstruction: medial thigh septo-fascio-cutaneous island flap.

From 1996 through 2001, the authors performed 26 vulvo-perineal reconstructions after vulvar cancer resection. A unilateral or bilateral medial thigh septo-fascio-cutaneous island flap was used in all cases. The vascular supply to this flap is guaranteed by the underlying fascial plexus that arises from the convergence of three longitudinal rows of vessels (anterior, medial, and posterior). The flap is fashioned in a triangle shape and incorporates the underlying muscular fascia, sparing the intermuscular septal perforators. It is advanced in a V-Y fashion and is easily adapted and secured to the recipient site. Competent urethral and anal meati are reconstructed with multiple intercalated flaps. Scarring at the donor site is limited and acceptable. The nerve supply guarantees acceptable sensation at the reconstructed area. The medial thigh septo-fascio-cutaneous flap allows a valid one-stage vulvo-perineal reconstruction with a simple surgical execution process after superficial soft tissue resections.

Aged↗
PubMed1995

Innervated posterior thigh flap for defects of the sole.

We report the use of an innervated posterior thigh flap to reconstruct the sole of a 6-year-old boy. This modification of the posterior thigh flap produced an aesthetically and functionally normal foot, capable of withstanding the stresses of youth and allowing the wearing of normal footwear, with a minimal donor defect.

Child↗
PubMed1996

Consideration of a thin flap as an entity and clinical applications of the thin anterolateral thigh flap.

A defatted (thinned) anterolateral thigh flap was designed to reconstruct skin defects requiring thin flap coverage. We used this flap as a free flap for five cases of skin defects, and the outcomes of the reconstructions were all successful. The vascular pedicle of this flap, the cutaneous perforator of the lateral circumflex femoral artery, is about 8 cm long and 2 mm in diameter, and it is ideal for microvascular anastomosis. Thinning is performed in about 3 to 4 mm of thickness almost uniformly except for the vascular pedicle. It was ascertained as one of the useful donor sites of the free thin flap. The virtue of the thin anterolateral thigh flap is its uniform thinness compared with other thin flaps reported previously--the thin groin flap and the thin rectus abdominis musculocutaneous flap. We considered thin flaps as an entity, and they are classified into three types.

Adult↗
PubMed2000

Closure of hemicorporectomy with bilateral subtotal thigh flaps.

Hemicorporectomy is typically performed with a circumferential truncal incision, and the wound is closed primarily. Wound disruption is a common complication, especially at the base of the wound closure and posteriorly at the lumbar vertebral level. We report a case of the use of bilateral subtotal thigh flaps for the closure of a hemicorporectomy wound in a patient with a defect extending up to the high lumbar region. The subtotal thigh flap is a well-vascularized thick flap that provides a firm support for the abdominal viscera and is a large flap that can be used to close even a high lumbar defect.

Adult↗
PubMed2001

The versatility of the pudendal thigh fasciocutaneous flap used as an island flap.

The pudendal thigh flap is a sensate fasciocutaneous flap based on the terminal branches of the superficial perineal artery, which is a continuation of the internal pudendal artery. Several authors have reported using this axial patterned flap in a bilateral fashion to reconstruct the vagina, mostly in patients with vaginal atresia. The technique is simple, safe, and reliable, and no stents or dilators are required. The reconstructed vagina has a natural angle and is sensate. The donor site in the groin can be closed primarily with an inconspicuous scar. The distinct advantages of this flap widen its indications to several other pathologies. In this article, the authors report on the bilateral use of the flap to reconstruct a vagina in patients with congenital atresia (n = 8) and after oncological resection (n = 5). Furthermore, the versatility of this island flap is also demonstrated by its use in a unilateral fashion in patients with recurrent or complex rectovaginal fistulas (n = 4) and in two patients with a defect of the posterior urethra in a heavily scarred perineum. All 31 pudendal thigh flaps survived completely. Some wound dehiscence was observed in two patients. Two other patients required a minor correction at the introitus of the vagina. The functional outcome was excellent in all patients, despite the presence of some hair growth in the flaps. This article discusses the expanding indications of this versatile flap and the refinements in operative technique.

Female↗
PubMed2002

Three-dimensional reconstruction of the oral cavity using the free anterolateral thigh flap.

Oral cavity reconstruction after removal of locally advanced tumors is particularly difficult because anatomical restoration must accurately reproduce the original structure and enable effective and fast rehabilitation of mastication, swallowing, and phonation. The authors report their 2-year experience with 17 patients surgically treated for oral cavity cancer with reconstruction performed with the free anterolateral thigh flap. Thanks to its thinness and pliability, this flap has proven to be perfectly adaptable to the structural peculiarities of the resected areas and has enabled the authors to considerably reduce the cosmetic and functional complications in the donor area observed with other flaps (such as the radial forearm flap). Flap grafting has always been complete and regular, and no intraoperative and postoperative complications have been observed. Swallowing recovery has always been satisfactory. On the basis of the authors' results, their current approach to oral cavity reconstruction is based on the use of flaps that enable anatomical restoration of the resected areas and reduce morbidity of the donor site. They believe that the anterolateral thigh flap can offer all of these opportunities, and the surgery can be simultaneously performed by two surgical teams.

Adult↗
PubMed2003

One-stage reconstruction of soft tissue and Achilles tendon defects using a composite free anterolateral thigh flap with vascularized fascia lata: clinical experience and functional assessment.

The combined loss of the Achilles tendon with overlying soft tissue is a reconstructive challenge. To achieve acceptable rehabilitation, such patients need skin coverage including functional repair of the Achilles tendon. This article presents four such patients who were treated successfully by means of an anterolateral thigh (ALT) composite flap with vascularized fascia lata. The size of the ALT flaps ranged from 10 to 16 cm in length and 6 to 9 cm in width. All flaps included vascularized fascia lata, which was rolled to serve as vascularized tendon graft (range 8 x 6 cm to 10 x 8 cm) for reconstruction of the Achilles tendon defect. Flap success rate was 100%. All patients could walk and climb stairs without support; however, mild difficulty when running was reported. Functional outcome of the recipient ankle and donor thigh morbidity were investigated by using a kinetic dynamometer comparing reconstructed sides with the healthy contralateral limbs. This assessment was performed in two patients at 2 years postoperatively. In the reconstructed ankles, isokinetic concentric measurements of dorsiflexion and plantar flexion showed a deficit of 30% and 40%, respectively. Functional evaluation of quadriceps femoris muscle contraction forces after free ALT composite flap harvest showed a 10% to 25% deficit. However, there were no difficulties in daily ambulating. In summary, the free composite ALT flap with vascularized fascia lata provides an alternative option for Achilles tendon reconstruction in complex defects.

Achilles Tendon↗
PubMed2005

Free anterolateral thigh adipofascial flap for hemifacial atrophy.

Though the etiology of hemifacial atrophy is still unknown, the aim of its reconstruction is cosmetic amelioration of the defect. Among many techniques introduced, microsurgical reconstruction has become the gold standard to restore the symmetry of the face. Seven free anterolateral thigh adipofascial flaps were used to reconstruct hemifacial atrophy between September 1999 and May 2005. There were 1 male and 6 females in the series. All the patients had unilateral disease (6 right and 1 left). The average age of onset of disease was 11.9 years. The average duration of atrophy was 6.7 years. The patients' average age was 25 years (range, 21 to 32 years), and the average follow-up period was 12.6 months (range, 6 to 36). The size of the transferred flap ranged from 8 x 6 cm to 12 x 13 cm. All adipofascial flaps survived completely. No complications occurred. The result is stable, and no recurrence of facial atrophy was seen in the patients after follow-up. One patient received minor revision because of the bulky reconstructed face. The esthetic appearance of the reconstructed face was acceptable. Despite a variable vascular anatomy that can give rise to some surgical challenge in raising the anterolateral thigh adipofascial flap, the authors conclude that this is a safe and reliable adipofascial flap for hemifacial atrophy.

Adult↗
PubMed2006

Perineum reconstruction with pedicled anterolateral thigh fasciocutaneous flap.

Eighteen pedicled anterolateral thigh perforator island flaps were used for complex perineal reconstructions between May 2003 and May 2005. The patients' average age was 48.6 years (range, 32 to 64 years), and the average follow-up period was 8 months (range, 2 to 13). In 7 cases, the perforator was septocutaneous and in 11 it was intramuscular. The application of the pedicled anterolateral thigh fasciocutaneous flap is described perineum reconstruction. The size of the perineum defects ranged from 6 x 9 cm to 16 x 17 cm, and the size of the transferred flap ranged from 8 x 11 cm to 18 x 20 cm. All flaps survived. One patient developed minor wound dehiscence in the posterior aspect of the perineal wound because of fecal contamination and skin maceration. The esthetic appearance of the reconstructed perineum was good. Despite a variable vascular anatomy that can give rise to some surgical challenge in raising the flap, the authors conclude that this is a safe and reliable flap for perineal reconstruction.

Adult↗
PubMed2006

Development and verification of saphenous, tibial and common peroneal nerve block techniques for analgesia below the thigh in the nonchondrodystrophoid dog.

OBJECTIVE: To document simple and reliable local, infiltrating nerve blocks for the saphenous, tibial and common peroneal nerves in the dog. STUDY DESIGN: Laboratory technique development; in vivo blind, controlled, prospective study. ANIMALS: Twenty canine cadavers and 18 clinically normal, client-owned dogs. METHODS: A peripheral nerve blockade technique of the tibial, common peroneal, and saphenous nerves was perfected through anatomic dissection. Injections were planned in the caudal thigh for the tibial and common peroneal nerves, and in the medial thigh for the saphenous nerve. Cadaver limbs were injected with methylene blue dye and subsequently dissected to confirm successful dye placement. Clinically normal dogs undergoing general anesthesia for unrelated, elective procedures were randomly assigned to treatment (bupivacaine; n = 8) or control (saline; n = 8) nerve blocks of the nerves under study. Upon recovery from general anesthesia, skin sensation in selected dermatomes was evaluated for 24 hours. RESULTS: Cadaver tibial, common peroneal, and saphenous perineural infiltrations were successful in nonchondrodystrophoid dogs (100, 100, and 97%, respectively.) Intraneural injection was rare (1%; 1/105; tibial nerve) in cadaver dogs. In the treatment group of normal dogs, duration of loss of cutaneous sensation in some dermatomes (saphenous, superficial and deep peroneal nerve) was significantly different than control dogs; the range of desensitization occurred for 1-20 hours. No clinical morbidity was detected. CONCLUSIONS: This technique for local blockade of the tibial, common peroneal, and saphenous nerves just proximal to the stifle is easy to perform, requires minimal supplies and results in significant desensitization of the associated dermatomes in clinically normal, nonchondrodystrophoid dogs. CLINICAL RELEVANCE: This technique may be an effective tool for post-operative analgesia to the femoro-tibial joint and distal pelvic limb. Other applications, using sustained-release drugs or methods, may include anesthesia/analgesia in high-risk patients or as a treatment for chronic pelvic limb pain or self-mutilation.

Anesthetics, Local↗
PubMed2001

Group I projections from intrinsic foot muscles to motoneurones of leg and thigh muscles in humans.

1. Group I projections from intrinsic plantar muscles to motoneurones (MNs) of human leg and thigh muscles were investigated. Changes in firing probability of single motor units (MUs) in the tibialis anterior (TA), peroneus brevis (Per brev), soleus (Sol), gastrocnemius medialis (GM), vastus lateralis (VL), semitendinosus (ST) and biceps (Bi) were studied after electrical stimuli applied to: (i) the tibial nerve (TN) at ankle level, (ii) the corresponding homonymous nerve, and (iii) the skin of the heel, to mimic the TN-induced cutaneous sensation. 2. Homonymous facilitation, attributable to monosynaptic Ia excitation, was found in all the sampled units. Early heteronymous excitation elicited by TN stimulation was found in many MUs. Later effects (3-5 ms central delay) were bigger and more frequently observed: excitation in most TA and Per brev MUs, and inhibition in most Sol, GM and Bi MUs and in many ST and VL MUs. The low threshold (approximately 0.5-0.6 x motor threshold) and the inability of a pure cutaneous stimulation to reproduce these effects (except the late excitation in TA MUs) indicate that they were due to stimulation of group I muscle afferents. 3. The early excitation was accepted to be monosynaptic when its central delay differed from that of the homonymous Ia excitation by less than 0.5 ms. Such a significant TN-induced monosynaptic Ia excitation was found in MUs belonging to all leg and thigh motor nuclei tested. Although its mean strength was relatively weak, it is argued that these monosynaptic connections might affect already depolarized MNs. 4. The late excitation found in TA and Per brev MUs is argued to be mediated through interneurones located rostral to MNs. 5. The late suppression, found in most Sol, GM and Bi MUs, and in many ST and VL MUs, was the dominant effect. It was accompanied by an inhibition of the Sol and quadriceps H reflexes at rest, and therefore reflects an inhibition directed to MNs. Its long latency is argued to reflect transmission by interneurones located rostral to MNs (the inhibitory counterpart of non-monosynaptic excitation). 6. The functional implications of these connections are discussed with respect to the requirements of the stance phase of human walking and running.

Adult↗
PubMed2001

Validation of a noninvasive, real-time imaging technology using bioluminescent Escherichia coli in the neutropenic mouse thigh model of infection.

A noninvasive, real-time detection technology was validated for qualitative and quantitative antimicrobial treatment applications. The lux gene cluster of Photorhabdus luminescens was introduced into an Escherichia coli clinical isolate, EC14, on a multicopy plasmid. This bioluminescent reporter bacterium was used to study antimicrobial effects in vitro and in vivo, using the neutropenic-mouse thigh model of infection. Bioluminescence was monitored and measured in vitro and in vivo with an intensified charge-coupled device (ICCD) camera system, and these results were compared to viable-cell determinations made using conventional plate counting methods. Statistical analysis demonstrated that in the presence or absence of antimicrobial agents (ceftazidime, tetracycline, or ciprofloxacin), a strong correlation existed between bioluminescence levels and viable cell counts in vitro and in vivo. Evaluation of antimicrobial agents in vivo could be reliably performed with either method, as each was a sound indicator of therapeutic success. Dose-dependent responses could also be detected in the neutropenic-mouse thigh model by using either bioluminescence or viable-cell counts as a marker. In addition, the ICCD technology was examined for the benefits of repeatedly monitoring the same animal during treatment studies. The ability to repeatedly measure the same animals reduced variability within the treatment experiments and allowed equal or greater confidence in determining treatment efficacy. This technology could reduce the number of animals used during such studies and has applications for the evaluation of test compounds during drug discovery.

Animals↗
PubMed1995

Comparison of in vivo tissue temperature profile and lesion geometry for radiofrequency ablation with a saline-irrigated electrode versus temperature control in a canine thigh muscle preparation.

BACKGROUND: It is thought that only a thin layer of tissue adjacent to the electrode is heated directly by electrical current (resistive heating) during radiofrequency ablation. Most of the thermal injury is thought to result from conduction of heat from the surface layer. The purpose of this study was to determine whether lesion depth could be increased by producing direct resistive heating deeper in the tissue with higher radiofrequency power, allowed by cooling the ablation electrode with saline irrigation to prevent the rise in impedance that occurs when the electrode-tissue interface temperature reaches 100 degrees C. METHODS AND RESULTS: In 11 anesthetized dogs, the thigh muscle was exposed and bathed with heparinized canine blood (36 degrees C to 37 degrees C). A 7F catheter, with a central lumen, a 5-mm tip electrode with six irrigation holes, and an internal thermistor, was positioned perpendicular to the thigh muscle and held at a constant contact weight of 10 g. Radiofrequency current was delivered to 145 sites (1) at high constant voltage (66 V) without irrigation (CV group, n = 31), (2) at variable voltage (20 to 66 V) to maintain tip-electrode temperature at 80 degrees C to 90 degrees C without irrigation (temperature-control group, n = 39), and (3) at high CV (66 V) with saline irrigation through the catheter lumen and ablation electrode at 20 mL/min (CV irrigation group, n = 75). Radiofrequency current was applied for 60 seconds but was terminated immediately in the event of an impedance rise > or = 10 omega. Tip-electrode temperature and tissue temperature at depths of 3.5 and 7.0 mm were measured in all three groups (n = 145). In 33 CV irrigation group applications, temperature was also measured with a separate probe at the center (n = 18) or edge (n = 15) of the electrode-tissue interface. In all 31 CV group applications, radiofrequency energy delivery was terminated prematurely (at 11.6 +/- 4.8 seconds) owing to an impedance rise associated with an electrode temperature of 98.8 +/- 2.1 degrees C. All 39 temperature-control applications were delivered for 60 seconds without an impedance rise, but voltage had to be reduced to 38.4 +/- 6.1 V to avoid temperatures > 90 degrees C (mean tip-electrode temperature, 84.5 +/- 1.4 degrees C). In CV irrigation applications, the tip-electrode temperature was not > 48 degrees C (mean, 38.4 +/- 5.1 degrees C) and the electrode-tissue interface temperature was not > 80 degrees C (mean, 69.4 +/- 5.7 degrees C). An abrupt impedance rise with an audible pop and without coagulum occurred in 6 of 75 CV irrigation group applications at 30 to 51 seconds, probably owing to release of steam from below the surface. In the CV and temperature-control group applications, the temperatures at depths of 3.5 (62.1 +/- 15.1 degrees C and 67.9 +/- 7.5 degrees C) and 7.0 mm (40.3 +/- 5.3 degrees C and 48.3 +/- 4.8 degrees C) were always lower than the electrode temperature. Conversely, in CV irrigation group applications, electrode and electrode-tissue interface temperatures were consistently exceeded by the tissue temperature at depths of 3.5 mm (94.7 +/- 9.1 degrees C) and occasionally 7.0 mm (65.1 +/- 9.7 degrees C). Lesion dimensions were smallest in CV group applications (depth, 4.7 +/- 0.6 mm; maximal diameter, 9.8 +/- 0.8 mm; volume, 135 +/- 33 mm3), intermediate in temperature-control group applications (depth, 6.1 +/- 0.5 mm; maximal diameter, 11.3 +/- 0.9 mm; volume, 275 +/- 55 mm3), and largest in CV irrigation group applications (depth, 9.9 +/- 1.1 mm; maximal diameter, 14.3 +/- 1.5 mm; volume, 700 +/- 217 mm3; P < .01, respectively). CONCLUSIONS: Saline irrigation maintains a low electrode-tissue interface temperature during radiofrequency application at high power, which prevents an impedance rise and produces deeper and larger lesions. A higher temperature in the tissue (3.5 mm deep) than at the electrode-tissue interface indicates that direct resistive heating occurred deeper

Animals↗
PubMed2000

Assessment of the thigh cuff technique for measurement of dynamic cerebral autoregulation.

BACKGROUND AND PURPOSE: Dynamic methods of measuring cerebral autoregulation have become an accepted alternative to static evaluation. This article aims to describe a set of data collected from healthy volunteers by a dynamic method, the purpose being to qualify and quantify expected results for those who may be designing a study using this technique. METHODS: Cerebral blood flow velocity (CBFV) (measured by transcranial Doppler) and arterial blood pressure (Finapres) were recorded in 16 normal subjects before, during, and after the induction of a blood pressure drop (release of bilateral thigh cuffs). This procedure was repeated 6 times for each subject. A mathematical model was applied to the data to generate an autoregulatory index (ARI) with values between 0 and 9. RESULTS: The ARI values for this sample population follow a normal distribution, with a mean+/-SD of 4.98+/-1.06 (n=15). Analysis of the cumulative mean ARI values of all subjects showed an exponential-type convergence of ARI toward the sample mean as the number of test iterations increased. The population average blood pressure drop on thigh cuff release was 26.4+/-7.1 mm Hg (n=16), occurring in 4.6+/-1. 7 seconds. The corresponding population average drop for CBFV was 15. 6+/-5.8 cm/s, taking 2.5+/-1.0 seconds. No significant trend was noted in the measurements as the number of test iterations increased. The correlation between the predicted and actual CBFV, having a mean value of 0.76+/-0.19, showed evidence of a nonlinear relationship to ARI values. Significant correlation was also found between ARI and (1) arterial blood pressure before cuff release and (2) the magnitude of the drop in CBFV on cuff release. CONCLUSIONS: The distribution of ARI values is not significantly different from normal. At least 3 iterations of the test procedure should be performed and averaged to obtain the mean ARI for each subject. There is no significant evidence of physiological accommodation as the number of test iterations increases. The effects of mean blood pressure and the magnitude of the change in CBFV should be considered as possible covariates when ARI data are analyzed.

Adult↗
PubMed1992

Thigh pain despite bone ingrowth into uncemented femoral stems.

Six porous-coated, uncemented femoral components were revised at a mean of 34.5 months for persistent thigh pain. At operation the stems were rigidly stable, difficult to extract, and showed good bony ingrowth. The four men and two women, with an average age of 59 years, all had thigh pain starting within the first year, progressive over time and unresponsive to conservative measures. These cases show that rigid fixation with good bony ingrowth does not guarantee the clinical success of a porous-coated uncemented femoral stem.

Adult↗
PubMed2005

Infantile fibrosarcoma of thigh--a case report.

Infantile fibrosarcoma is a rare soft tissue malignant tumor, when it occurs, it is usually seen in the first year of life. The clinical course of infantile fibrosarcoma is more favorable and metastasis is rare compared with that in adulthood. While adult fibrosarcoma are common in the thigh, infantile fibrosarcoma affect chiefly the distal portions of the extremities. Standard treatment is primarily wide surgical excision. In this case report, we present our experience of an infantile fibrosarcoma of thigh with good clinical course 36 months after tumor resection and the usefulness of detecting the ETV6-NTRK3 gene fusion in differential diagnosis.

DNA-Binding Proteins↗
PubMed1998

Thermal inactivation of Escherichia coli O157:H7, Salmonella senftenberg, and enzymes with potential as time-temperature indicators in ground turkey thigh meat.

The USDA Food Safety and Inspection Service has proposed to amend cooking regulations to require that any thermal process used for poultry products be sufficient to cause a 7 D reduction in salmonellae. Several enzymes have been suggested as potential indicators of heat processing in poultry, yet no relationship between the inactivation rates of these enzymes and salmonellae had been determine. The thermal inactivation kinetics of endogenous muscle proteins. Escherichia coli O157:H7 and Salmonella senftenberg were compared in ground turkey thigh meat in thermal death time studies. Bacteria counts were determined and muscle extracts were assayed for residual enzyme activity or protein concentration D and zeta values were calculated using regression analysis. S. senftenberg had higher D values at all temperatures and was more heat resistant than E. coli. The zeta values of E. coli on Petrifilm Coliform Count plates and phenol red sorbitol agar plates were 6.0 and 5.7 degrees C, respectively. The zeta values of S. senftenberg were 5.6 and 5.4 degrees C on Petrifilm and agar, respectively. Lactate dehydrogenase (LDH) was the most heat stable protein at 64 degrees C. LDH, glyceraldehyde-3-phosphate dehydrogenase, creatine kinase, triose phosphate isomerase (TPI), acid phosphatase, serum albumin, and immunoglobulin G had zeta values of 3.8,4.3,4.8,5.8,6.3,6.7, and 8.6 degrees C, respectively , in turkey containing 4.3% fat. The zeta values for TPI decreased to 5.4 degrees C in thigh meat containing 9.8% fat. Temperature function of TPI was most similar to that of S. senftenberg, suggesting it might function as an endogenous time-temperature integrator to monitor adequacy of processing when a performance standard based on this pathogen is implemented.

Acid Phosphatase↗