Trends in postcoronary artery bypass graft sternal wound dehiscence in a provincial population

BACKGROUND:

It appears that the medical profile of patients undergoing coronary artery bypass graft (CABG) surgery has changed. The impact of this demographic shift on CABG outcomes, such as sternal wound dehiscence, is unclear.

OBJECTIVES:

To quantify the incidence and trends of sternal wound dehiscence, quantify the demographic shift of those undergoing CABG and identify patient factors predictive of disease.

METHODS:

A prospective analysis was performed on a historical cohort of consecutive patients who underwent CABG (without valve replacement) in Alberta between April 1, 2002 and November 30, 2009. The incidence and trends of sternal wound dehiscence were determined. In addition, the trend of the mean Charlson index score and European System for Cardiac Operative Risk Evaluation (EuroSCORE) (capturing patient comorbidities) was analyzed. Univariable analysis and multivariable models were performed to determine factors predictive of wound dehiscence.

RESULTS:

A total of 5815 patients underwent CABG during the study period. The incidence proportion of sternal wound dehiscence in Alberta was 1.86% and the incidence rate was 1.98 cases per 100 person-years. Although both the EuroSCORE and Charlson scores significantly increased over the study period, the incidence of sternal wound dehiscence did not change significantly. Factors predictive of sternal wound dehiscence were diabetes (OR 2.97 [95% CI 1.73 to 5.10]), obesity (OR 1.55 [95% CI 1.05 to 2.27]) and female sex (OR 1.90 [95% CI 1.26 to 2.87]).

CONCLUSIONS:

The incidence proportion of sternal wound dehiscence in Alberta was comparable with the incidence previously published in the literature. While patients undergoing CABG had worsening medical profiles, the incidence of sternal wound dehiscence did not appear to be increasing significantly.     

Inferiorly based thigh flap for reconstruction of defects around the knee joint

Background:

Soft-tissue defects around the knees are common in injured limbs and in the same injury the leg is often involved and the thigh is spared. Furthermore due to pliable and relatively lax skin, we have used inferiorly based thigh flap to reconstruct defects around knee joint.

Aims and Objectives:

The aim of this study is to evaluate the use of inferiorly based thigh flap to cover soft-tissue defects over the proximal one-third of the leg, patellar region, knee, and lower thigh.

Materials and Methods:

This study was conducted during the period between October 2011 and February 2013. Inferiorly based anteromedial thigh fasciocutaneous flap was performed on 12 patients and inferiorly based anterolateral thigh fasciocutaneous flap on four patients. The sites of the soft-tissue defects included patellar regions, infrapatellar region, upper one-third of leg, lower thigh, and over the knee joint.

Results:

Patients were evaluated post-operatively in terms of viability of flap, the matching of the flap with the recipient site, and donor site morbidity. All the flaps survived well except one which developed distal marginal flap loss, one in which wound dehiscence was noticed, and two in which mild venous congestion was observed. Venous congestion in two patients subsided on its own within 3 days. One patient with wound dehiscence achieved complete healing by secondary intention. Patient who developed distal flap loss required debridement and skin grafting. No appreciable donor site morbidity was encountered. Skin colour and texture of the flap matched well with the recipient site.

Conclusions:

The inferiorly based thigh flap is a reliable flap to cover the defect over proximal one-third of the leg, patellar region, knee, and lower thigh.KEY WORDS: Defect around the knee joint, inferiorly based thigh flap, perforator based flap     

Thoracodorsal artery perforator fasciocutaneous flap: A versatile alternative for coverage of various soft tissue defects

Objective:

The thoracodorsal artery perforator (TDAP) flap has contributed to the efficient reconstruction of tissue defects that require a large amount of cutaneous tissue. The optimal reconstruction method should provide thin, and well-vascularized tissue with minimal donor-site morbidity. The indications for the use of this particular flap with other flaps are discussed in this article.

Materials and Methods:

Thirteen patients underwent soft tissue reconstruction using TDAP flaps between 2009 and 2011. Of those, there were four cases of antecubital burn contracture, three cases of axillary burn contracture, two cases of giant hair cell nevus of upper extremity, two cases of axillary reconstruction following severe recurrent hidradenitis, and two cases of crush injury. All patients were male and their ages ranged from 20 to 23 (average, 21 years). The mean follow-up period was 8 months (range, 4-22 months).

Results:

All reconstructive procedures were completed without any major complications. Minor complications related to transfered flaps were wound dehiscence in one case, transient venous congestion in two cases. Minor complication related to the donor site was seroma in one case. The success rate was 100%, with satisfactory cosmetic results.

Conclusions:

The TDAP flap is a safe and extremely versatile flap that offers significant advantages in acute and delayed reconstruction. Although the vascular anatomy may be variable, free and pedicled TDAP flap is a versatile alternative for soft tissue defects. It adapts very well to the soft tissue defects with acceptable donor site scar.KEY WORDS: Burn contracture, hidradenitis suppurativa, soft tissue defects, the thoracodorsal artery perforator, thoracodorsal artery perforator flap     

A reconstructive algorithm for deep sternal wound coverage: the Cologne-Merheim approach

Background

Several options are known for treatment of the sternal wounds. However, various wound diameters need various flaps.

Patients and Methods

135 patients with sternum osteomyelitis from 2006 to 2010 of our institution were analyzed in a retrospective study. After using various flaps from 2006 to 2009 we developed an algorithm based on wound width, using pectoralis muscle flaps or the latissimus dorsi muscle flap. Two groups from 2006 - 2009, and 2010 were analyzed. A matched pair analysis was done for groups with small (< 6 cm), medium (6 cm - 12 cm) and large wound width (> 12 cm). Endpoint for each analysis was wound dehiscence larger than 1cm. Factors influencing wound dehiscence were analyzed, such as infectious agents, applied flap for coverage, gender, co-morbidities, number of debridements before closure, ICU length of stay. Statistical analysis was done by Mann Whitney U-Test using the SPSS program.

Results

130 patients were included in the study and 48 in the match. No significant difference in patient population between the two groups was detected. Total number of wound dehiscence in the 2010 group was lesser, however without statistical significance. Groups with wound sizes lesser than 6 cm showed a significant difference in wound dehiscence when using our algorithm. However, significant lesser length of ICU and hospital stay for all groups treated according to our algorithm was seen.

Conclusions

ICU and hospital length of stay can be significantly reduced when using our algorithm, reducing costs for treatment of deep sternal osteomyelitis. Level of Evidence: Level IV, therapeutic study.     

Sternotomy infections: sternal salvage and the importance of sternal stability

Objective

To review the management of sternal wound infections after cardiovascular surgery.

Design

Retrospective case study.

Setting

All management took place in a single tertiary-care university hospital.

Patients

Twenty-one consecutive patients seen over a 3-year period who had infected median sternotomy incisions after cardiovascular surgery.

Interventions

Surgical eradication of infection, including sternal débridement and rewiring or placement of vascularized muscle flaps, or both.

Main Outcome Measures

Resolution of infection and restoration of sternal stability.

Results

The development of sternal wound infection was found to be associated with sternal instability. In 12 of 17 patients treated initially with sternal débridement and rewiring the infection was cured. Vascularized muscle flap transfers were required to eradicate the infection in the remaining patients.

Conclusions

Sternal débridement and rewiring is an effective initial treatment for sternal wound infections in selected patients. Some patients may require placement of muscle flaps for definitive treatment.     

An electromyographic analysis of shoulder muscle activation during push-up variations on stable and labile surfaces

Background:

Numerous exercises are used to strengthen muscles around the shoulder joint including the push-up and the push-up plus. An important consideration is the addition of surface instability in the form of swiss ball for rehabilitation and strength. The justification for the use of the swiss ball is based on its potential for increasing muscular demand required to maintain postural stability and for improving joint proprioception. Evidence for this is lacking in literature.

Purpose of the Study:

To compare the myoelectric amplitude of shoulder muscles during push-ups on labile and stable surface.

Study Design:

Same subject experimental study.

Materials and Methods:

Thirty healthy male subjects in the age group 20-30 years with a mean height of 173.65 cm (± SD 2.56) and a mean weight of 69.9 kg (±SD 0.2) were taken. Surface electromyogram was recorded from triceps, pectoralis major, serratus anterior and upper trapezius while performing push-up and push-up plus exercises, both on labile and stable surface.

Results:

Significant increase in muscle activity was observed in pectoralis major and triceps muscle (only during eccentric phase of elbow pushups), while serratus anterior and upper trapezius showed no change in activation level on swiss ball.

Conclusion:

The addition of a swiss ball is capable of influencing shoulder muscle activity during push-up variations, although the effect is task and muscle dependent.     

Simple and reliable way in sternum wound coverage--tripedicle pectoralis major musculocutaneous flap

Objective: Sternotomy wound infection requires radically debridements and need secondary reconstruction of the resulting defect. Pectoralis major muscular or musculocutaneous flap is quite common in sternal wound closure. We modified the pectoralis major musculocutaneous flap design: bipedicle advancement cutaneous flap combined with thoracoacromial myocutaneous perforators, as a “tripedicle” fashion. We tried to utilize the cutaneous pedicle to provide a reliable skin coverage and decrease the wound dehiscence rate in lower one third sternal wound. Methods: Four patients undergoing median sternotomy surgery between 2004 and 2007 suffered from sternal wound infection and received tri‐pedicle pectoralis major musculocutaneous flaps transfer. Results: No skin paddle necrosis or wound dehiscence occurred in the postoperative course. Cosmetically and chest stability were satisfactory without complains about the daily activity. Conclusions: Tripedicle pectoralis major musculocutaneous flap is a simple and reliable technique to cover sternal wound defect necessitating resurfacing surgery. The blood supply to the skin paddle can be enriched by the superior and inferior cutaneous pedicle and the wound dehiscence rate is decreased with this technique. © 2008 Wiley‐Liss, Inc. Microsurgery, 2008.     

Outcome of free digital artery perforator flap transfer for reconstruction of fingertip defects

Background:

Fingertip defect can be treated with many flaps such as random pattern abdominal flap, retrograde digital artery island flap, V-Y advancement flap, etc. However, swelling in the fingertip, dysfunction of sensation, flexion and extension contracture or injury in the hemi-artery of the finger usually occurs during the recovery phase. Recently, digital artery perforator flaps have been used for fingertip reconstructions. With the development of super microsurgery techniques, free flaps can be more effective for sensory recovery and durability of the fingertip.

Materials and Methods:

Six cases (six fingers) of fingertip defects were treated with free digital artery perforator flaps of appropriate size and shape from the proximal phalanx. During surgery, the superficial veins at the edge of flap were used as reflux vessels and the branches of the intrinsic nerve and dorsal digital nerve toward the flap were used as sensory nerves. The proximal segment of the digital artery (cutaneous branches) towards the flap was cut off to form the pedicled free flap. The fingertips were reconstructed with the free flap by anastomosing the cutaneous branches of digital artery in the flap with the distal branch or trunk of the digital artery, the flap nerve with the nerve stump and the veins of the flap with the digital artery accompanying veins or the superficial veins in the recipient site.

Results:

Six flaps survived with successful skin grafting. Patients were followed up for 6-9 months. The appearance and texture of the flaps was satisfactory. The feeling within the six fingers recovered to S4 level (BMRC scale) and the two point discrimination was 3-8 mm.

Conclusion:

Free digital artery perforator flap is suitable for repairing fingertip defect, with good texture, fine fingertip sensation and without sacrificing the branch of the digital artery or nerve.     

A simple method for predicting survival of pedicled skin flaps before completely raising them

Background:

Pedicled skin and fasciocutaneous flaps are commonly used in plastic surgery. Once such a flap is completely raised on its pedicle it becomes defenceless against any possible necrosis.

Aim:

To use a simple method for raising such a flap in a manner that can predict the vascularity better, offering additional protection against necrosis.

Materials and Methods:

A total of 30 skin and fasciocutaneous flaps were raised in 27 patients. They were raised as bipedicle flaps; and the vascularity of the flap was tested by occluding the additional pedicle with a pedicle occlusion clamp. If the vascularity was found to be satisfactory the flap was primarily transferred; if found unsatisfactory it was either delayed or abandoned. The delayed flaps were again tested during transfer.

Results:

Nineteen (63.3%) flaps were primarily transferred, 11 (36.7%) flaps were delayed, and two (6.7%) delayed flaps displayed an unsatisfactory pattern during transfer. Twenty-two (73.3%) flaps fully survived and seven (23.3%) underwent partial thickness necrosis at the tip, which healed without any further surgical intervention, making 29 (96.7%) flaps clinically successful. There was major necrosis of one flap. All the flaps with a scar at the base survived.

Discussion:

The clinical success of 96.7% indicated a high-degree of predictability of flap survival through this method. Also, this method could safely assess the vascularity of flaps during primary transfer, during delayed transfer, and also those with a scar at the base.

Conclusions:

This technique is recommended in all major pedicled skin and fasciocutaneous flaps.KEY WORDS: Blood circulation, blood flow velocity, necrosis, skin transplantation, surgical flaps     

Keystone flaps in coloured skin: Flap technology for the masses?

Introduction:

Viscoelastic properties of skin in coloured ethnic groups are less favourable compared to Caucasians for executing Keystone flaps. Keystone flaps have so far been evaluated and reported only in Caucasians. The potential of Keystone flaps in a coloured ethnic group is yet unknown.

Aim:

This article reviews the experience to reconstruct skin defects presenting in a coloured ethnic group, by using Keystone flaps, with a review of existing literature.

Design:

Uncontrolled case series.

Materials and Methods:

This retrospective review involves 55 consecutive Keystone flaps used from 2009 to 2012, for skin defects in various locations. Patient demographic data, medical history, co-morbidity, surgical indication, defect features, complications, and clinical outcomes are evaluated and presented.

Results:

In this population group with Fitzpatrick type 4 and 5 skin, the average patient age was 35.73. Though 60% of flaps (33/55) in the series involved specific risk factors, only two flaps failed. Though seven flaps had complications, sound healing was achieved by suitable intervention giving a success rate of 96.36%. Skin grafts were needed in only four cases.

Conclusions:

Keystone flaps achieve primary wound healing for a wide spectrum of defects with an acceptable success rate in a coloured skin population with unfavorable biophysical properties. By avoiding conventional local flaps and at times even microsurgical flaps, good aesthetic outcome is achieved without additional skin grafts or extensive operative time. All advantages seen in previous studies were verified. These benefits can be most appreciated in coloured populations, with limited resources and higher proportion of younger patients and unfavorable defects.KEY WORDS: Skin ethnic variations, flap success rate, flap learning curve, flap resources, Keystone flap, skin extensibility     

Reverse peroneal artery flap for large defects of ankle and foot: A reliable reconstructive technique

Background:

Large soft tissue defects around the lower third of the leg, ankle and foot always have been challenging to reconstruct. Reverse sural flaps have been used for this problem with variable success. Free tissue transfer has revolutionised management of these problem wounds in selected cases.

Materials and Methods:

Twenty-two patients with large defects around the lower third of the leg, ankle and foot underwent reconstruction with reverse peroneal artery flap (RPAF) over a period of 7 years. The mean age of these patients was 41.2 years.

Results:

Of the 22 flaps, 21 showed complete survival without even marginal necrosis. One flap failed, where atherosclerotic occlusion of peroneal artery was evident on the table. Few patients had minor donor site problems that settled with conservative management.

Conclusions:

RPAF is a very reliable flap for the coverage of large soft tissue defects of the heel, sole and dorsum of foot. This flap adds versatility in planning and execution of this extended reverse sural flap.KEY WORDS: Distally based peroneal flaps, extended reverse sural flaps, foot reconstruction, peroneal artery, reverse peroneal flaps     

Versatile use of vacuum-assisted healing in fifty patients

Context:

Wound management can often be a challenging experience, especially in the presence of diabetes mellitus, vascular or immunological compromise. While no single technique can be considered by itself to be ideal, vacuum-assisted healing, which is a recent innovation, is fast becoming a necessary addition as adjuvant therapy to hasten wound healing.

Aims:

To determine the efficacy of vacuum-assisted healing.

Settings and Design:

Plastic surgery centre. Ministry of Health Hospital, Kuwait.

Materials and Methods:

Patients from Kuwait in a wide variety of clinical situations were chosen for study: Patients (n=50) were classified by diagnosis: Group 1: pressure sore- sacral (n= 3), trochanteric (n=6), ischial (n= 2); Group 2: ulcers (n= 11); Group 3: traumatic soft tissue wounds (n =15); Group 4: extensive tissue loss from the abdominal wall perineum, thigh and axilla (n =5); Group 5: sternal dehiscence wounds (n =4) and Group 6: wounds from flap necrosis (n =4). All wounds were subjected to vacuum by wall unit or portable unit, using pressure of 100-125 mm - continuous or intermittent. Closure of wounds, significant reduction in size and refusal by patient for continuation of vacuum-assisted closure therapy were end points of vacuum application.

Results:

Sixteen per cent of patients showed complete healing of the wound. Seventy per cent of patients showed 20-78% reduction in wound size. In 14% of patients treatment had to be discontinued. All patients showed improvement in granulation tissue and reduction in bacterial isolates and tissue oedema.

Conclusions:

The application of subatmospheric pressure or negative pressure promotes healing in a wide range of clinical settings and is an advanced wound healing therapy that can optimize patient care, promote rapid wound healing and help manage costs. It may be used in most instances in both hospital and community settings.     

Free Boomerang-shaped Extended Rectus Abdominis Myocutaneous flap: The longest possible skin/myocutaneous free flap for soft tissue reconstruction of extremities

Background:

A soft tissue defect requiring flap cover which is longer than that provided by the conventional “long” free flaps like latissimus dorsi (LD) and anterolateral thigh (ALT) flap is a challenging problem. Often, in such a situation, a combination of flaps is required. Over the last 3 years, we have managed nine such defects successfully with a free “Boomerang-shaped” Extended Rectus Abdominis Myocutaneous (BERAM) flap. This flap is the slightly modified and “free” version of a similar flap described by Ian Taylor in 1983.

Materials and Methods:

This is a retrospective study of patients who underwent free BERAM flap reconstruction of soft tissue defects of extremity over the last 3 years. We also did a clinical study on 30 volunteers to compare the length of flap available using our design of BERAM flap with the maximum available flap length of LD and ALT flaps, using standard markings.

Results:

Our clinical experience of nine cases combined with the results of our clinical study has confirmed that our design of BERAM flap consistently provides a flap length which is 32.6% longer than the standard LD flap and 42.2% longer than the standard ALT flap in adults. The difference is even more marked in children. The BERAM flap is consistently reliable as long as the distal end is not extended beyond the mid-axillary line.

Conclusion:

BERAM flap is simple in design, easy to harvest, reliable and provides the longest possible free skin/myocutaneous flap in the body. It is a useful new alternative for covering long soft tissue defects in the limbs.KEY WORDS: Extended rectus abdominis free flap, longest myocutaneous free flap, soft tissue reconstruction of extremities     

Reconstruction of sternal defects with pectoralis major muscle flap

The earliest treatment of the median sternotomy defects was serial debridements and secondary healing. The muscle flaps that can be used in reconstruction of the presternal defects are pectoralis major muscle flap, rectus abdominis muscle flap, vertical rectus abdominis muscle flap, latissimus dorsi muscle flap with or without skin island, bipedicled pectoralis-rectus muscle flap, and external oblique muscle flap. Pectoralis major muscle flap can be used either as bilateral or unilateral rotation advancement flap, island flap, turnover flap, split turnover flap, and segmental muscle flap. Forty-eight patients with median sternotomy defects, who were treated with pectoralis major muscle flap, were included in this study. The complications were mortality, flap loss, flap dehiscence, persistent infection, and hematoma. The patients were evaluated in terms of functional loss after the operation by shoulder movement measurements. Various techniques of flap transfer can be used for the closure of a presternal defect; almost all presternal defects can be covered with the pectoralis major muscle in a single stage operation. In our opinion, the pectoralis major muscle flap should be the first choice of treatment for sternal defects.     

Cross-leg flap: Its role in limb salvage

Background:

Pedicled cross-extremity flaps for lower limb wound coverage have been replaced by free tissue transfer in the last two decades. However, there are certain difficult situations where the free flap cannot be employed and alternative methods are needed. We describe our experience with cross-leg flap in 18 patients for the reconstruction of difficult leg defects in which no suitable recipient vessels were available for microvascular anastomosis in the vicinity of the defect.

Materials and Methods:

18 patients (17 men and 1 woman) with mean range 31.5 yrs(range 18-70 yrs) grade III B tibial fractures were included in the study. fasciocuteneous cross leg flap was employed and extremities were immobilized by external Fixator.

Results:

Fifteen flaps were completely available with two had marginal necrosis and one supsficial epidermal necrosis. No complications were related to the donor site, flap, or by immobilization are noted. Each patient resumed essentially normal gait and activity without any stiffness of joints related with the flap or external fixator.

Conclusion:

The addition of external fixator stabilization aids greatly in wound care, as well as for general ease of the patient mobility and positioning. Cross-leg flap offers the possibility of salvaging limbs that are otherwise nonreconstructable.     

Role of tongue flap in palatal fistula repair: A series of 41 cases

Introduction:

Despite the improved techniques of repair of cleft palate, fistula occurrence is still a possibility either due to an error in the surgical technique or due to the poor tissue quality of the patient. Though commonly the fistula closure is established by use of local flaps but at times the site and the size of the fistula make use of local flaps for its repair a remote possibility. The use of tongue flaps because of the central position in the floor of the mouth, mobility and the diversity of positioning the flaps make it a method of choice for closure of anterior palatal fistulae than any other tissues. The aim of this study was to analyse the utility of tongue flap in anterior palatal fistula repair.

Materials and Methods:

We had 41 patients admitted to our hospital during the period 2006-2012 for repair of palatal fistula and were enrolled into the study. In the entire 41 cases, fistula was placed anteriorly. The size of the fistulae varied from 2 cm × 1.5 cm to 5.5 cm × 3 cm. The flaps were divided after 3-week and final inset of the flap was done.

Observation and Result:

None of the patients developed flap necrosis, in one case there was the dehiscence of the flap, which was reinset and in one patient there was bleeding. None of our patients developed functional deformity of the tongue. Speech was improved in 75% cases.

Conclusion:

Leaving apart its only drawback of two-staged procedure and transient patient discomfort, tongue flap remains the flap of choice for managing very difficult and challenging anterior palatal fistulae.KEY WORDS: Anteriorly based tongue flap, anterior palatal fistula, cleft palate repair, cleft lip repair, hyper nasality, speech     

Perforator plus flaps: Optimizing results while preserving function and esthesis

Background:

The tenuous blood supply of traditional flaps for wound cover combined with collateral damage by sacrifice of functional muscle, truncal vessels, or nerves has been the bane of reconstructive procedures. The concept of perforator plus flaps employs dual vascular supply to flaps. By safeguarding perforators along with supply from its base, robust flaps can be raised in diverse situations. This is achieved while limiting collateral damage and preserving nerves, vessels, and functioning muscle with better function and aesthesis.

Materials and Methods:

The perforator plus concept was applied in seven different clinical situations. Functional muscle and fasciocutaneous flaps were employed in five and adipofascial flaps in two cases, primarily involving lower extremity defects and back. Adipofascial perforator plus flaps were employed to provide cover for tibial fracture in one patients and chronic venous ulcer in another.

Results:

All flaps survived without any loss and provided long-term stable cover, both over soft tissue and bone. Functional preservation was achieved in all cases where muscle flaps were employed with no clinical evidence of loss of power. There was no sensory loss or significant oedema in or distal to the flap in both cases where neurovascular continuity was preserved during flap elevation. Fracture union and consolidation were satisfactory. One patient had minimal graft loss over fascia which required application of stored grafts with subsequent take. No patient required re-operation.

Conclusions:

Perforator plus concept is holistic and applicable to most flap types in varied situations. It permits the exercise of many locoregional flap options while limiting collateral functional damage. Aesthetic considerations are also addressed while raising adipofascial flaps because of no appreciable donor defects. With quick operating times and low failure risk, these flaps can be a better substitute to traditional flaps and at times even free tissue transfers.     

The extended latissimus dorsi flap option in autologous breast reconstruction: A report of 14 cases and review of the literature

Background:

Autologous breast reconstruction using the extended latissimus dorsi flap has been infrequently reported. In the current study, the authors are reporting their own clinical experience with this method. A review of the literature is also discussed.

Materials and Methods:

Over a three year period, 14 patients underwent breast reconstruction using the extended latissimus dorsi (LD) flap. Patients with small to medium sized breasts were selected. The age of the patients ranged from 29 to 42 years with a follow-up period ranging from six to 18 months. The indications, flap-related complications and donor site morbidity and aesthetic results were evaluated.

Results:

The main indication to use the flap was dorsal donor site preference by patients. The remaining patients were either not suitable for a flap from the abdomen or wished to get pregnant and were offered the dorsal donor site. Neither total nor partial flap loss was recorded but donor site morbidity was mainly due to seroma, which was treated conservatively in all patients, except for one who required surgery. Another two patients suffered from wound breakdown and distal necrosis of the back flaps. Mild contour deformity was also noted on the back of all patients but caused no major concern. Indeed, the overall patient satisfaction was very high.

Conclusion:

The extended LD flap proved to be a good option for autologous breast reconstruction in selected patients. Patients should be warned of the potential for seroma and mild contour back deformity.     

Closure of infected sternal wounds with a unilateral rectus abdominis muscle flap in addition to bilateral pectoralis major myocutaneous advancement flaps

We have recently added to our regimen a unilateral rectus abdominis muscle flap to cover the lower sternum and adjacent soft tissues, in addition to bilateral pectoralis major myocutaneous advancement flaps for closure of infected sternal wounds. Twenty patients underwent this procedure for closure of infected sternal wounds after initial débridement at our institutions. There were no intraoperative deaths in this series, but three patients died of other medical conditions. Two patients developed hematomas and one developed recurrent sternal wound infection after surgery; two had superficial wound infections and five had minor wound problems (i.e., skin edge necrosis). All surviving patients (17/20, 85%) had healed sternal wounds with normal chest contour and there were no instances of flap necrosis, sternal wound dehiscence, or abdominal wall hernia during the follow-up (18–60 months). Based upon our experience, we recommend a unilateral rectus abdominis muscle flap in addition to bilateral pectoralis major myocutaneous advancement flaps for selected patients with infected sternal wounds. This approach provides reliable soft tissue coverage with acceptable morbidity and mortality in this high-risk patient population. Received: 29 July 1998 / Accepted: 1 March 1999     

Biomechanical analysis of the FlatWire Figure 8 sternal fixation device

OBJECTIVE:

To determine whether the FlatWire Figure 8 sternal fixation device (Penn United, USA) is mechanically superior to the current standard in sternotomy closure.

DESCRIPTION:

Unstable sternal closure using traditional steel-wire cerclage can increase postoperative pain, bony cut-through and wound dehiscence. The authors present the Figure 8 sternal fixation device to minimize these complications. Biomechanical properties of the device were compared with conventional steel wire sternal repair.

EVALUATION:

Using two constructs of both FlatWire and steel wire, pull-to-failure, Hertzian contact and cut-through were compared. Samples were tested to 500,000 cycles or failure. Cyclic comparisons were performed using log-rank t tests and Student’s t tests for cut-through analysis. FlatWires were found to have superior biomechanical properties in all categories tested.

CONCLUSION:

The FlatWire provides superior biomechanical properties compared with conventional steel wire, which may lead to reduced sternal wound complications.