Posttraumatic ankle arthrosis.

Until there is a total ankle implant developed that stands the test of time, ankle arthrodesis will continue to be the gold standard in the operative treatment of the arthritic ankle joint. Ankle arthrodesis techniques include minimally invasive methods that can be performed via arthroscopy or with miniarthrotomy. Extensile techniques include extra-articular fusions, the transfibular approach, removal of both malleoli, and the Blair fusion. An ankle arthrodesis can be fixated utilizing either internal or external fixation. The form of fixation chosen depends on availability and surgeon preference and/or experience, and most importantly, which is the optimal method for the patient. Although ankle arthrodesis is the mainstay treatment for posttraumatic arthrosis, innovations and technical improvements have resulted in reconstructive alternatives for ankle arthritis, including distraction ankle arthroplasty, supramalleolar osteotomy, and total ankle replacement. Advances in biomaterials and instrumentation have allowed for the evolution of arthrodesis techniques as evidenced by the myriad of techniques reported in the literature.

Percutaneous injuries in a high-volume podiatric surgical residency program.

Percutaneous injuries (i.e., needlesticks) are a possible occupational hazard to all residents performing invasive procedures. Transmission of blood-borne pathogens has become a potential risk in these injuries. As such, the purpose of this investigation was to assess the frequency and circumstances involving percutaneous injuries in the podiatric surgical resident. A survey of 20 present residents from July 1991 to July 1999 was conducted to assess percutaneous injuries. These residents participated in 19,505 surgical cases in this timeframe; 16,185 were podiatric cases and 3,347 were nonpodiatric. Using a two-part questionnaire to assess the circumstances surrounding any percutaneous injury, 80% of the residents reported at least one percutaneous injury during their training. A total of 33 were injuries reported for the 19,505 cases. The incidence of injury per surgical case was 0.17% overall, and 0.14% for foot and ankle cases. Analysis of the data showed a median = 2, mode = 2, and a mean = 1.63 injuries per resident with a range of 0-5. When analyzing the circumstances involving the injuries, most injuries were self-inflicted (66.7%), occurred during wound closure (72.7%), and were caused by a nonhollow bore needle or instrument (81.8%). Also, no correlation could be made to the time of day during which the procedure was performed, the year of residency training, or the number of cases that the resident performed that day before the injury occurred. Interestingly, over 67% of the injuries occurred to the resident's left hand. Although 97% of the injuries were reported to the employee health officer, the patient and resident were screened for HIV and hepatitis B or C in only 78.8% of the cases. In those tested, no resident was exposed to HIV or hepatitis B or C.

Proximal shortening lesser metatarsal osteotomy: a mathematical-geometric basis.

Reconstruction and restoration of the lesser metatarsal parabola after an iatrogenic complication of a lesser metatarsal osteotomy provides a difficult surgical dilemma for the foot and ankle surgeon. This study's purpose was to determine if a formula could be developed, through a geometric and mathematical basis, for the proximal shortening lesser metatarsal osteotomy to aid the surgeon in determining the amount of bone needed to be resected to correct the deformity. This study was divided into three parts. In part I, 15 lesser metatarsals (metatarsals 2, 3, and 4) harvested from fresh frozen cadavers had shortening proximal osteotomies performed. This osteotomy removes a cylindrical piece of bone that is perpendicular to the metatarsal shaft from the proximal aspect of the lesser metatarsal to create axial shortening of the metatarsal and changes the relationship of the metatarsal head to the weightbearing surface. These metatarsals had five radio-opaque markers placed into them and were radiographed pre- and postosteotomy. These markers created a pre- and postgeometric graphic plotting for the changes in length, height, and dorsiflexion. Computer graphing was then utilized to analyze changes in height, length, and dorsiflexion of each metatarsal. Formulas were created from these plottings to determine the actual change in height, length, and dorsiflexion for a set amount of bone removed. The formulas created from these data were: Length: Actual change = Bone removed *0.95; Height: Actual change = Bone removed *0.54; and Dorsiflexion: Actual change = Bone removed *0.44 mm/deg. In part II of study, 15 identical saw bone lesser metatarsals were used to verify the formulas, by taking out the amount of bone needed for 0.5-mm increment change, starting at 1.0 mm and increasing to 8.0 mm. Techniques used were identical to part one. Part III was performed to demonstrate that the formula would be reproducible for height when there is a difference in the angulation of the metatarsal. Fifteen identical sawbones where plotted in plaster at declinations ranging from 8 degrees to 42 degrees. Then the osteotomy was performed removing 4.0 mm of sawbone from each specimen using the same technique as parts I and II. All parts and the formulas were statistically analyzed using a bivariate regression model, which showed that the formulas were valid for length, height, and dorsiflexion with a 95% confidence. With these experimental models, the authors found reproducible formulas that hopefully could aid the surgeon in determining the amount of bone they needed to resect to effect correction of this difficult reconstruction.