手部开放性屈肌腱损伤的早期修复

目的探讨手部屈肌腱损伤早期修复及早期功能锻炼对手部功能恢复的疗效。方法统计我院自2008年1月-2009年5月手部屈肌腱损伤患者80例124指,共计221条肌腱,其中I区16条,Ⅱ区89条,Ⅲ区36条,Ⅳ区10条,V区70条,均予早期修复,术后早期辅以适当的功能锻炼,以TAM评价法进行功能评价。结果术后随访4个月～1年,随访72例,失访8例。患指TAM优良率达94．64％。结论早期修复手部开放性屈肌腱损伤,术后辅以规范的功能锻炼对手部功能恢复具有良好的疗效。     

手屈肌腱损伤Ⅰ期显微修复及功能康复97例 临床报告

目的：探讨手屈肌腱损伤Ⅰ期显微修复的方法及疗效。方法：本组97例182条肌腱损伤,其中男59例,女38例;平均年龄32岁（6-65岁）;玻璃割伤22例,刀伤32例,电锯伤29例,挤压伤14例;Ⅰ区12例,Ⅱ区35例,Ⅲ区28例,Ⅳ区8例,V区14例。合并血管神经损伤68例,合并骨折53例,均I期采用改良Kessler法缝接肌腱,术后早期循序渐进康复锻炼。结果：本组97例均获随访,时间3-24个月,按TAM法评定疗效,优48例,良39例,可8例,差2例。结论：修复肌腱损伤应彻底清创,无创操作,具备牢固光滑的肌腱吻合技术及自始至终贯穿功能康复理念。     

Cyclical testing of zone II flexor tendon repairs

Kessler, Strickland, or modified Becker repairs, all augmented with a running circumferential epitenon suture, were performed for simulated zone II flexor tendon lacerations in the index, long, and ring fingers of 12 fresh-frozen cadaveric specimens. Each hand was tested with a tensiometer built for curvilinear testing of human flexor tendons in an intact hand. Each tendon was cycled 100 times, then examined for gapping before testing to failure. Maximum load to failure, including tendon load and pinch force, was recorded for each tendon. We propose that combining the advantages of cyclical testing and a curvilinear model is the most effective way of testing flexor tendon repairs capable of undergoing an early active motion protocol. None of the repaired tendons failed during the cyclic portion of testing. The average gapping after cycling for the 3 suture techniques was 0.12 +/- 0.35 mm for the Kessler technique, 0. 00 +/- 0.00 mm for the Strickland technique, and 0.19 +/- 0.26 mm for the modified Becker technique. The maximum tendon loads to failure were 33.8 +/- 6.8 N for the Kessler technique, 30.4 +/- 5.64 N for the Strickland technique, and 76.3 +/- 9.02 N for the modified Becker technique. There was a statistically significant difference between the modified Becker repair and the other 2 repairs for maximum tendon load and pinch force to failure. The results of this study show that all 3 tendon repair techniques can withstand forces reported with passive motion, but only the modified Becker repair allows sufficient strength above those forces that are estimated for active motion during tendon healing.     

Two-stage reconstruction for flexor tendon injuries in zone II using a silicone rod and pedicled sublimis tendon graft

We report the results of staged flexor tendon reconstruction in 12 patients (12 fingers) with neglected or failed primary repair of flexor tendon injuries in zone II. Injuries involved both flexor digitorum profundus (FDP) and flexor digitorum sublimis (FDS), with poor prognosis (Boyes grades II–IV). The procedure included placing a silicone rod and creating a loop between the FDP and FDS in the first stage and reflecting the latter as a pedicled graft through the pseudosheath created around the silicone rod in the second stage. At a mean follow-up of 18 months (range 12–30 months), results were assessed by clinical examination and questionnaire. The mean total active motion of these fingers was 188°. The mean power grip was 80.0% and pinch grip was 76% of the contralateral hand. The rate of excellent and good results was 75% according to the Buck-Gramcko scale. These results were better than the subjective scores given by the patients. Complications included postoperative hematoma in two, infection in one, silicone synovitis in one (after stage I) and three flexion contractures after stage II. This study confirmed the usefulness of two-stage flexor tendon reconstruction using the combined technique as a salvage procedure to restore flexor tendon function with a few complications.     

Tendon injuries of the hand

Tendon injuries are the second most common injuries of the hand and therefore an important topic in trauma and orthopedic patients. Most injuries are open injuries to the flexor or extensor tendons, but less frequent injuries, e.g., damage to the functional system tendon sheath and pulley or dull avulsions, also need to be considered. After clinical examination, ultrasound and magnetic resonance imaging have proved to be important diagnostic tools. Tendon injuries mostly require surgical repair, dull avulsions of the distal phalanges extensor tendon can receive conservative therapy. Injuries of the flexor tendon sheath or single pulley injuries are treated conservatively and multiple pulley injuries receive surgical repair. In the postoperative course of flexor tendon injuries, the principle of early passive movement is important to trigger an "intrinsic" tendon healing to guarantee a good outcome. Many substances were evaluated to see if they improved tendon healing; however, little evidence was found. Nevertheless, hyaluronic acid may improve intrinsic tendon healing.     

Direct end-to-end repair of flexor pollicis longus tendon lacerations.

Between 1976 and 1986, 38 consecutive acute isolated flexor pollicis longus lacerations were repaired. This study excluded all replanted or mutilated digits and all lacerations with associated fracture. Average follow-up was 26 months. Tendon rehabilitation was standardized. Range of motion and pinch strength were measured postoperatively. Seventy-four percent (28/38) of the flexor pollicis longus injuries occurred in zone II. Neurovascular injury occurred in 82% of the lacerations, and this correlated with the zone of tendon injury. In 21% of the patients (8/38) both digital nerves and arteries were transected. Postoperative thumb interphalangeal motion averaged 35 degrees and key pinch strength was 81% that of the uninjured thumb. One rupture occurred in a child. Laceration of the flexor pollicis longus is likely to involve damage to neurovascular structures, and repair may be necessary. Direct end-to-end repairs within the pulley system do at least as well as delayed tendon reconstruction and do not require additional procedures.     

Evaluation and Functional Assessment of Flexor Tendon Repair in the Hand

Seventeen patients with 28 flexor tendon injuries were examined after tendon repair. The current most frequently used evaluation systems, including grip and pinch strength, were compared with functional outcome as assessed by a questionnaire, evaluating Disabilities of Arm, Shoulder and Hand (DASH). Good correlation was found between Total Active Motion (TAM) and the Original Strickland test (kappa = 0.85), however with reduced categories. Only limited correlation was found between the DASH-score and TAM (r =-0.33) as well as between the DASH-score and pinch strength (r =-0.35). We suggest reporting the average Range of Motion (ROM) of the complete finger as a percentage of the contralateral finger, instead of reporting the classified result, and to include assessment of pinch strength. It would be very useful to have an accurate functional outcome assessment, but DASH proves to be insufficiently sensitive.     

Evaluation and functional assessment of flexor tendon repair in the hand

Seventeen patients with 28 flexor tendon injuries were examined after tendon repair. The current most frequently used evaluation systems, including grip and pinch strength, were compared with functional outcome as assessed by a questionnaire, evaluating Disabilities of Arm, Shoulder and Hand (DASH). Good correlation was found between Total Active Motion (TAM) and the Original Strickland test (kappa = 0.85), however with reduced categories. Only limited correlation was found between the DASH-score and TAM (r = -0.33) as well as between the DASH-score and pinch strength (r = -0.35). We suggest reporting the average Range of Motion (ROM) of the complete finger as a percentage of the contralateral finger, instead of reporting the classified result, and to include assessment of pinch strength. It would be very useful to have an accurate functional outcome assessment, but DASH proves to be insufficiently sensitive.     

Flucloxacillin Reduces Stiffness Following Flexor Tendon Repair

To determine the benefit of antibiotic prophylaxis on postoperative mobility in flexor tendon repairs, case notes of 72 flexor tendon injuries in twenty four patients were analyzed retrospectively (2001–2003). Only patients with non-contaminated injuries from sharp instruments in flexor zone 2 were included in the study; 57% were male, average age was 31 years, and 24% were smokers. The majority of injuries were caused by metal blades (45%). Most tendons were repaired with modified Kessler technique (69%). Twenty-five percent received intravenous flucloxacillin or co-amoxiclav perioperatively. Reduced total active motion (TAM, found in 25% of patients more than 7weeks after surgical repair) significantly complicated patients without perioperative intravenous flucloxacillin cover. The use of intravenous perioperative flucloxacillin is a plausible adjunct in surgery to prevent postoperatively reduced mobility.     

Functional outcome of the hand following flexor tendon repair at the 'no man's land'

PURPOSE: To evaluate the functional outcome of the hand following flexor tendon repair at 'no man's land' using 2 strands of a modified Kessler core suture and combined controlled motion rehabilitation protocol. METHODS: Records of 31 zone-2 flexor tendon injuries in 21 digits of 16 patients between July 2000 and June 2005 were reviewed retrospectively. The injured tendons were repaired within 24 hours using 2 strands of a modified Kessler core suture, reinforced by a continuous circumferential epitendon suture. All patients completed a rehabilitation protocol that included active extension against a rubber band, passive flexion, and controlled passive extension and passive flexion exercises. Functional outcome of the fingers was assessed using the Buck-Gramcko II score. Hand grip strength, rehabilitation period, and rupture rate were also measured. RESULTS: 17 (81%) out of 21 digits in 15 out of 16 patients achieved an excellent-to-good functional grade. The remaining patient with concomitant injuries to 4 (19%) digits attained a poor functional grade, attributable to poor compliance with the rehabilitation protocol. The mean rehabilitation period was 130 days and the mean grip strength was 78% that of the uninjured side. Concomitant digital nerve injury did not adversely affect the final outcome. Only one (4.8%) patient experienced a rupture. CONCLUSION: The surgical method and rehabilitation protocol used for zone-2 flexor tendon injury is safe and results in a reasonably good functional outcome.     

Flexor tendon injuries in children

Flexor tendon injuries in adults differ from those in children. 38 children (22 male and 16 female) with a mean age of 6.7 years were treated for flexor tendon injuries by primary suture and controlled mobilization between 1985 and 1992. 53 flexor tendons were injured (average 1.5 digits per patient) and the injury most commonly affected the little finger (23 patients). 60% of injuries occurred in zone 2. Using Lister's criteria, 82% achieved excellent or good results. Repair of both FDS and FDP was better than repair of FDP alone, even in zone 2. There were three tendon ruptures(all classified as poor results) and one other poor result occurredin a zone injury with an associated ulnar nerve palsy. The outcome after flexor tendon repair in children is better than in adults in our hands because rapid healing of tendons occurs in children. No child has yet required tenolysis because in children adhesions are more pliable. Both flexor tendons should be repaired irrespective of the zone of injury. A functional hand can be expected after flexor tendon repair in children.     

Pediatric flexor tendon injuries: A 10-year outcome analysis

BACKGROUND:

Primary flexor tendon repair was first introduced in the 1960s. Since then, major advances in the understanding of flexor tendon anatomy and biology have led to improved outcomes following repair. Relative to the adult population, sparse knowledge exists as to which operative and postoperative treatments are most successful in children. This is due, in part, to the rarity of pediatric tendon lacerations compared with the adult population, but also related to challenges when working with smaller anatomy and the decreased compliance in children with respect to rehabilitation protocols. Published reports indicate that the incidence of ‘good’ flexor tendon repair outcomes is as low as 53%.

OBJECTIVE:

To determine the injury pattern and demographics of pediatric flexor tendon injuries involving zones I, II and III over the past decade, and to report results and identify treatment paradigms that are associated with optimal outcomes.

METHODS:

A retrospective chart review of all flexor tendon injuries involving zones I, II and III between April 2001 and December 2010 was performed. Parameters reviewed included demographics, injury mechanism, repair technique, outcomes and complications.

RESULTS:

A total of 47 patients with a median age of eight years experienced 100 tendon injuries. The most common cause of injury was glass (n=22), with the most common digit injured being the small finger (n=30). Tendon injuries included the following: flexor digitorum superficialis (n=46); flexor digitorum profundus (n=45), flexor pollicis longus (n=8); and adductor pollicis longus (n=1). Zone III had the highest number of injuries (n=47), followed by zone II (n=39). Ninety tendons were repaired using polyester suture, the most common size being 4-0. The modified Kessler technique was used in the majority of cases (n=62). Only 22 tendons underwent an epitendinous repair. Splint immobilization was used in 30 patients and a full cast in 17. The median duration of immobilization was four weeks. Forty-two patients underwent postoperative hand therapy. Using the American Society for Surgery of the Hand Total Active Motion (TAM) score, 40 of 47 patients experienced 100% recovery with no functional limitations. Two patients had a score <100%, not necessitating further surgery. A second operation was required for five patients. All patients in this group demonstrated 100% TAM at one year.

CONCLUSION:

Pediatric flexor tendon injuries remain rare and usually involve the dominant hand holding or manipulating an object. An excellent outcome was found in 95.9% of patients assessed by TAM scores. Repair technique was chosen according to the size of tendon involved. Patients not treated with hand therapy and not immobilized in a cast were often too young to participate in rehabilitation. Based on the results, immobilization of young children for four weeks is safe and does not worsen functional outcomes. Of the patients requiring a second procedure, no predictive variables for poorer outcomes were found on analysis of age, outcome, cause, location, repair technique, rehabilitation protocol or zone of injury.     

Flexor pollicis brevis adductorplasty: an alternative method in ulnar nerve paralysis

Loss of pinch power associated with loss of coordinated movement of thumb and index fingers is the major disability in patients with ulnar nerve paralysis. Several tendon transfer methods utilizing different donor muscles have been used to restore adductor pollicis muscle function in ulnar nerve paralysis. In this paper, we discuss the transfer of flexor digitorum brevis muscle to the tendon of adductor pollicis muscle as an alternative method to restore key pinch in ulnar nerve paralysis. The technique was applied to 4 patients with ulnar nerve paralysis. Before clinical application, an anatomic study was carried out in 6 cadaver hands. In cadavers, radial and ulnar arteries were injected with latex and arterial pedicles of flexor pollicis brevis muscle were dissected under 4x magnification. Also, motor branches from the median nerve were shown at the entrance point to the muscle. In surgical practice, the superficial head of the muscle is detached from its insertion and the minor pedicle of the muscle is cut. Muscle is dissected proximally up to two thirds of its length. The dominant pedicle of the muscle originating from superficial palmar arcus is preserved, and the muscle is sutured to the tendon of the adductor pollicis muscle close to its insertion. Patients were evaluated in terms of key pinch strength preoperatively and at the postoperative sixth month using a pinch meter (Chattanooga Group, Inc). Key pinch strengths were recorded and expressed as percentage of the strength of the contralateral uninvolved hand. Mean key pinch strength of our patients was 29.7%.In conclusion, we believe in that flexor pollicis brevis adductorplasty may be an alternative method for restoration of adductor pollicis muscle function in ulnar nerve paralysis.     

Long-term follow-up of the Moberg key grip procedure

The long-term results of the key grip procedure (tenodesis of the flexor pollicis longus tendon to the radius, release of the A1 pulley, and percutaneous pin fixation of the interphalangeal joint of the thumb) were evaluated in 10 tetraplegic patients. Seven patients also had tenodesis of the extensor pollicis longus and brevis tendons to prevent flexion at the metacarpophalangeal (MP) joint. Patients were examined an average of 7.4 years after surgery. Progressive flexion of the MP joint gradually occurred, indicating failure of the extensor tenodesis. Excessive bowstringing of the flexor pollicis longus tendon across the MP joint occurred in nine patients. Because of failure of the extensor tenodesis and bowstringing of the flexor tendon, the patients had to progressively extend the wrist further to pinch small objects. Functional testing demonstrated improved hand use in eight patients. Lateral pinch strength was related to wrist extension torque.     

Flexor tendon injuries in pediatric patients

PURPOSE: The purpose of this research was to study the incidence and outcome of flexor tendon injuries in pediatric patients. METHODS: A survey of flexor tendon repair in children less than 16 years of age was performed in the City of Helsinki during 2000-2005. A retrospective clinical outcome study of all consecutive 28 patients with 45 involved fingers treated in Children's Hospital was also performed at a mean 38 months (range 12-53 months) after surgery. Active motion program after multistrand tendon repair was used in 33 fingers, cast immobilization in 11 fingers, and elastic bands in 1 finger. Functional and cosmetic subjective result was evaluated by a visual analog scale (VAS, 0-100). Range of motion (ROM) of metacarpophalangeal (MCP) and interphalangeal (IP) joints were measured. Grip strength was recorded. Functional outcome methods of Buck-Gramcko, ASSH, Strickland, and distal interphalangeal joint (DIP) ROM methods were applied. RESULTS: The calculated annual incidence of finger flexor injury per child in Helsinki was 0.036 per 1000. There were no ruptures of the multistrand repairs with active motion program, but three 2-strand core sutures failed within 1 month of the repair. Mean functional and cosmetic VAS scores (all 28 patients) were 87 and 84. Mean ROM ratio of the DIP joint in zone 1 and 2 injuries was 60%, compared to 98% in zone 3 and 5 injuries. Ranges of motion of the proximal interphalangeal (PIP) and MCP joints were practically normal in all patients. There was a discrepancy among the functional outcome scores, with good and excellent results in all 45 fingers (Buck-Gramcko), in 39 fingers (ASSH), in 36 fingers (original Strickland), and in 32 fingers (DIP ROM). CONCLUSIONS: Flexor tendon injuries in children are rare. Both subjective and objective outcomes are generally good. Active motion program is an effective technique after multistrand flexor tendon repair at all levels in children. Range of motion of the DIP joint may be a more effective means of evaluating outcome in pediatric flexor tendon injuries. TYPE OF STUDY/LEVEL OF EVIDENCE: Therapeutic IV.     

Clinical results of flexor tendon repair in zone II using a six-strand double-loop technique compared with a two-strand technique

The clinical and functional results of 46 patients who underwent zone II flexor tendon repair using the Lim/Tsai technique combined with the Kleinert/Duran early active mobilisation regime and place and hold exercises were assessed. The results were compared with 25 patients who were treated by the modified Kessler technique and the Kleinert/Duran regime alone. After a follow-up of 8 to 17 weeks, the Lim/Tsai group had a better grip strength and a significantly better total active motion of 141 degrees compared with 123 degrees . The rupture rates (Lim/Tsai: 1/51; Kessler: 3/26) and the extension deficits were not statistically different in the two groups. However, the complication rate was significantly lower and the average time of treatment was significantly shorter in the Lim/Tsai group. These results support the use of the Lim/Tsai six-strand repair technique in zone II flexor tendon injuries and early active mobilisation without rubber-band traction.     

Active mobilisation after flexor tendon repair: comparison of results following injuries in zone 2 and other zones

PURPOSE: To prospectively study the role of active mobilisation after flexor tendon repair. METHODS: The standard modified Kessler's technique was used to repair 46 digits in 32 patients with flexor tendon injuries. Early active mobilisation of the repaired digit was commenced on the third postoperative day. Range of movement was monitored and recovery from injury in zone 2 was compared with injury in other zones. RESULTS: There were 24 and 22 injuries in zone 2 and other zones respectively. The total active motion score of the American Society for Surgery of the Hand was measured. Patients with zone-2 injuries achieved similar results to those with other-zone injuries apart from a 3-week delay in recovery. The final results were good to excellent in 71% and 77% of zone-2 and other-zone cases respectively (p < 0.05). There were 2 ruptures in zone-2 and one rupture in zone-3 repairs (6.5%). CONCLUSION: Preliminary results of this study showed that active mobilisation following flexor tendon repair provides comparable clinical results and is as safe as conventional mobilisation programmes although recovery in patients with zone-2 injury was delayed.     

Flexor tendon lacerations in zone V.

Twenty-three patients with zone V flexor tendon lacerations rehabilitated by the Kleinert protocol were studied at an average of 46 months after trauma. Hand function was subjectively normal in only eight. Of fourteen patients who were employed at the time of injury, eight returned to their original occupations. Eight others were working at other jobs, and we considered six more capable of employment. Only one had a poor functional result that precluded occupational use of the hand. Pinch/grip strengths recovered to 85%/79% of the uninvolved side. Independent flexor digitorum superficialis/flexor digitorum profundus action was present in only seven patients. Sixteen regained full digital flexion. Extension loss averaged 25% at the wrist and 10% in each digit. As assessed by static two-point discrimination, sensibility was poor after associated median and ulnar nerve transections; this did not preclude good objective functional results. Complications included two tendon ruptures, proximal interphalangeal hyperextension in the presence of an unrepaired flexor digitorum superficialis, and limited motion in two patients after poor compliance in therapy. Tenolysis was needed in 4 of the 23. We now use a modified Duran technique for noncompliant patients and in those who are unable to extend their PIP joints because of weak intrinsic muscles.     

Transfer of the pronator teres tendon to the tendons of the flexor digitorum profundus in tetraplegia

In eleven patients who had traumatic tetraplegia, the pronator teres tendon was transferred to the flexor digitorum profundus tendons to restore active flexion of the fingers. At the same time, in ten of these patients the tendon of the brachioradialis was transferred to the tendon of the flexor pollicis longus, and in the eleventh patient the brachioradialis tendon was transferred to the tendon of the flexor digitorum superficialis of the small finger, to restore pinch. The average time between injury and operation was thirty-four months. The average length of follow-up after operation was thirty-four months. Ten patients gained functional active flexion of the fingers, and they reported improved performance of activities of daily living. When the wrist was in 30 degrees of extension, the average active grasp strength was twenty-one millimeters of mercury and the average key-pinch strength was 2.2 kilograms. The average active flexion of the fingers from the resting position, measured from the tip of the finger to the distal palmar crease, was 1.5 centimeters. Only one patient did not gain active flexion of the fingers. Of the entire group, this patient had the least function of the hand on preoperative evaluation; retrospectively, he seemed to be a poor candidate for operation, since the strength of the pronator teres muscle and the sensibility of the hand were insufficient for useful function. We concluded that, in selected tetraplegic patients, transfer of the pronator teres tendon to the flexor digitorum profundus tendons provides useful active flexion of the fingers.     

Factors that influence the outcome of zone I and zone II flexor tendon repairs in children

PURPOSE: To evaluate the factors that influenced the clinical results of zone I and II flexor tendon repairs in children at a single institution. METHODS: Forty-one fingers (35 patients) in patients ages 2 to 14 years with zone I or II flexor tendon injuries were identified. There was a zone I tendon injury in 16 fingers and a zone II tendon injury in 25 fingers. Concomitant injuries to the digital nerves were seen in 18 fingers. Primary repair was performed within 1 week in 35 fingers and delayed repair (2-9 wk) was performed in 6 fingers. After surgery 22 fingers (21 patients) were treated with early controlled mobilization and 19 fingers (14 patients) were treated with plaster immobilization. RESULTS: All patients were available for evaluation at a mean follow-up period of 42 months. Patients were subdivided into 2 age groups: (1) 0 to 7 years and (2) 8 to 15 years. Digital performance was evaluated by determining the percentage return of normal finger function according to a total active motion formula. Functional evaluation of all digits in both groups showed excellent or good results. Zone I repairs had better results than zone II repairs and isolated tendon repairs had better results than those with associated nerve repairs. The age of the patients nor postoperative protocol did not influence the final digital motion. CONCLUSIONS: A good outcome can be expected after repair of zone I or II flexor tendon injuries in children. TYPE OF STUDY/LEVEL OF EVIDENCE: Prognostic III.