The accessory vascularization of the tensor fasciae latae muscle: towards a new classification?

PURPOSE

The tensor fasciae latae (TFL) muscle is supplied by the lateral femoral circumflex artery (LCFA), arising from the deep femoral artery. However, it has been noted that there is also a consistent vascular anastomotic network. The aim of this study was to describe the accessory vascularization of the TFL muscle through a descriptive anatomical study, in order to hypothesize the feasibility of harvesting a TFL flap in the event of an injury to the main pedicle. In addition, we illustrate this hypothesis with a successful clinical case of Scarpa freconstruction following ligature of the deep femoral artery.

METHODS

The description of the accessory vascularization was obtained by injecting dye into seven lateral femoral circumflex arteries (LCFA), six superficial circumflex iliac arteries (SCIA), and three inferior gluteal arteries (IGA).

RESULTS

The TFL muscle was vascularized primarily by the LCFA. A vascular anastomotic network with the SCIA and the IGA was observed. After selective injection to the SCIAs and IGAs, the subsequent injection to the LCFA showed a diffusion of the TFL skin paddle with a perforasome overlapping between the different vascular territories.

CONCLUSION

The ascending branch of the lateral femoral circumflex plays a dominant role in the vascularization of the TFL muscle. As a result of a periarticular anastomotic network of the hip, this artery establishes several connections with the proximal arteries. Consequently, in cases where blood flow through the LCFA is interrupted, it should be equally possible to harvest the TFL flap through its accessory vascularization.

[Emergency free flap in reconstruction of the lower limb: About 23 cases over 11 years]

OBJECTIVES

To study the coverage period influence and various parameters concerning the microsurgical act on the patient clinical outcomes.

METHODS

We report 23 cases of reconstruction of lower limb loss of substance by free flap operated from 2010 to 2021. Among them, 9 patients were operated on as an emergency versus 14 in the secondary or late phase of the trauma.

RESULTS

The average age of injured patients operated on emergency was 42 years (17-68 years) and 34 years for the patients who undergo deferred surgery (17-57 years). The sex ratio (female/male) was 22% in patients operated on urgently and 7% in patients operated on later. Regarding the type of free flap, it was Serratus anterior muscle flap in 10 cases, Latissismus dorsi flap in 9 cases, ALT flap in 3 cases and Gracilis muscle flap in 1 case. There were 2 failures of vascularized free transfer (8.7%) with complete necrosis of the flap and 3 revision surgeries on venous thrombosis which finally made it possible to obtain 3 flap successes. We analyze the results (complications/osteitis) according to the time to coverage.

CONCLUSIONS

In our study, we did not find any significant difference between the groups operated in emergency and at a distance concerning the rate of infection and failure of the flaps.

Soft tissue coverage options around the knee

Defects around the knee exhibit various etiologies and pose challenges to both orthopedists and plastic surgeons. While a number of reconstructive coverage options are available, flaps are almost always required for complex defects. Many local flaps are easily placed, including muscle and perforator flaps sourced from the thigh to the leg. As the recipient vessels lie deep, free tissue transfers are challenging. Good postoperative management and efficient collaboration between orthopedic and reconstructive surgeons are the keys to successful knee reconstruction, restoring an esthetic contour and preserving joint function.

Factors predictive of relapse in adult bacterial osteomyelitis of long bones

Background

Osteomyelitis is a difficult-to-cure infection with a high relapse rate despite combined medical and surgical therapies. Some severity factors, duration of antimicrobial therapy and type of surgical procedure might influence osteomyelitis relapse.

Methods

116 patients with osteomyelitis were followed for ≥1 year after hospital discharge. Demographic, microbiological and clinical data, eight severity factors and treatment (surgical and antibiotic) were analyzed.

Results

Mean age was 53 years and 74.1% were men. Tibia (62.1%) and S. aureus (58.5%) were the most commonly involved bone and bacteria, respectively. Mean follow-up was 67.1 months. Forty-six patients underwent bone debridement, 61 debridement plus flap coverage and 9 antimicrobial therapy only. Twenty-six patients (22.4%) relapsed, at a mean of 11.2 months since hospital discharge. Duration > 3 months (p = 0.025), number of severity factors (P = 0.02) and absence of surgery (P = 0.004) were associated with osteomyelitis relapse in the univariate analysis. In the Cox regression analysis, osteomyelitis duration > 3 months (P = 0.012), bone exposure (P = 0.0003) and type of surgery (P < 0.0001) were associated with relapse. Regarding the surgical modalities, bone debridement with muscle flap was associated with better osteomyelitis outcomes, as compared with no surgery (P < 0.0001) and debridement only (P = 0.004).

Conclusions

Osteomyelitis extending for > 3 months, bone exposure and treatment other than surgical debridement with muscular flap are risk factors for osteomyelitis relapse.

Pelvic floor reconstruction by modified rectus abdominis myoperitoneal (MRAM) flap after pelvic exenterations

OBJECTIVE

To describe the technique and report experiences with pelvic floor reconstruction by modified rectus abdominis myoperitoneal (MRAM) flap after extensive pelvic procedures.

METHODS

Surgical technique of MRAM harvest and transposition is carefully described. The patients in whom pelvic floor reconstruction with MRAM after either infralevator pelvic exenteration and/or extended lateral pelvic sidewall excision was carried out were enrolled into the study (MRAM group, n=16). Surgical data, post-operative morbidity, and disease status were retrospectively assessed. The results were compared with a historical cohort of patients, in whom an exenterative procedure without pelvic floor reconstruction was performed at the same institution (control group, n=24).

RESULTS

Both groups were balanced in age, BMI, tumor types, and previous treatment. Substantially less patients from the MRAM group required reoperation within 60days of the surgery (25% vs. 50%) which was due to much lower rate of complications potentially related to empty pelvis syndrome (1 vs. 7 reoperations) (p=0.114). Late post-operative complication rate was substantially lower in the MRAM group (any grade: 79% vs. 44%; grade≥3: 37% vs. 6%) (p=0.041). The performance status 6months after the surgery was ≤1 in the majority of patients in MRAM (81%) while in only 38% of patients from the control group (p=0.027). There was one incisional hernia in MRAM group while three cases were reported in the controls.

CONCLUSIONS

Pelvic floor reconstruction by MRAM in patients after pelvic exenterative procedures is associated with a substantial decrease in postoperative complications that are potentially related to empty pelvis syndrome.