closed reduction and percutaneous kirschner wire fixation of displaced

Original

Article

CLOSED REDUCTION AND PERCUTANEOUS KIRSCHNER WIRE FIXATION OF DISPLACED COLLES FRACTURE IN ADULTS M. AKHTER BAIG, KASHIF AHMED, S. MUJAHID HUMAIL Department of Orthopaedics (Unit I), Dow University of Health Sciences, Karachi ABSTRACT Objective: To find out the outcome of percutaneous Kirschner wire fixation, after closed reduction, in Colles Fracture. Design & Duration: Quasi experimental prospective study from February 2005 to July 2007. Setting: Department of Orthopaedics (Unit I), Civil Hospital, Karachi. Patients: Thirty three adult patients with displaced Colles Fracture. Methodology: Closed reduction and manipulation was done followed by percutaneous Kirchner wire fixation of the displaced Colles fracture through radial styloid across the fracture and one pin was passed in the interval between first and second dorsal extensor compartment. After reduction and fixation the arm was immobilized in a cast above the elbow with the forearm and wrist in neutral position. Kirschner wire was removed after six weeks, followed by support with a wrist splint. The results were assessed by Weilands criteria based on radiology and statical analysis was done using t-test and p-value. Results: Out of the total 33 cases, the outcome was excellent in 7(21.2%), good in 25(75.8%), and fair in 1(3%) case. The overall success rate was more than 95%. There was a statistically significant difference from pre-operative to post-operative, on the average, in radial angle (t=10.82, p=0.001), palmar angle (t=19.74, p=0.001) and radial length (t=9.6, p=0.001). Conclusion: Percutaneous Kirschner wire fixation is a minimally invasive technique that provides an effective means of maintening the anatomical fracture reduction. It does not required highly skilled personnel or sophisticated tools for application. KEY WORDS: Colles Fracture, Kirschner Wire, Percutaneous Fixation

distal part of the radius.2 The fracture must have at least four out of the following six criteria (deformities):3

INTRODUCTION Colles fracture named after Abraham Colles (1814) is also known as pouteau fracture. In many parts of the world, the term Colles fracture means a fracture with in 2.5cm of the lower end of the radius produced by fall on the outstretched hand. Colles fracture is a common injury affecting 17% of women over the age of fifty years.1 These fractures are typically displaced and angulated dorsally and radially with shortening of the

1. 2. 3. 4. 5. 6.

Impaction. Radial displacement. Radial angulation. Dorsal displacement. Dorsal angulation. Supination.

The fracture may be comminuted and the styloid process of ulna is often avulsed with the triangular fibrocartilagenous complex, so that the inferior radio-ulnar joint is disrupted. The bone is usually osteoporotic and the injury commonly affects the postmenopausal women.4 There is an association between anatomical and functional results.5 If the fracture is allowed to unite in poor anatomical alignment, a poor functional outcome is more likely.6,7 The common practice is to attempt closed

Correspondence: Dr. M. Akhter Baig, Assoc. Prof. Orthopaedics, Dow University of Health Sciences, Karachi. Phones: 0333-2267362. E-mail: [email protected] 31

Volume 24, Issue 1, 2008

Percutaneous K-wire fixation of displaced Colles Fracture manipulative reduction under anaesthesia and to immobilize the forearm and wrist in a below elbow plaster.8

M. A. Baig, K. Ahmed, S. M. Humail

The purpose of this study was to evaluate the early results of treatment when using percutaneous Kirschner wire fixation for displaced Colles fracture in adults.

Colles fracture has certain peculiarities. Firstly, it is often comminuted on the dorsal surface which makes the fracture unstable and requires open reduction and internal fixation (ORIF). Secondly, there may be associated injury to distal radioulnar joint, which if malunited can lead to greater limitation of supination and pronation. Thirdly, the connecting ligaments of the distal radioulnar joint may be torn or ulnar styloid may be fractured, so all these demand meticulous management. Initially, it was thought to be a simple fracture, but now, it is recognized as a complex injury.

PATIENTS & METHODS This quasi experimental study was conducted in the Department of Orthopedics (Unit I) of Civil Hospital Karachi on 33 adult patients with displaced Colles fracture, from February 2005 to July 2007. Following patients were included in this study: Colles fracture (Type-I Frykman), with dorsal displacement, in which the anatomical reduction can be obtained. Colles fractures with no more than two intra-articular fragments.

Complications from wrist fractures are being recognized and reported with increasing frequency. The prevalence of early complications following fractures of the distal part of radius ranges from 20-30%.9,10 After initial closed reduction11, soft tissue complications like pressure sore, stenosing tenosynovitis, adhesive capsulitis, attrition, rupture of tendons, vessel laceration, reflex sympathetic dystrophy are seen. The long term complications12 are residual deformity, loss of mobility, radio-carpal arthrosis, malposition, malunion, painful wrist, shoulderhand syndrome, median and ulnar nerve injury and rupture of extensor pollicis longus tendon. Unrecognized associated injuries are Volkmanns ischemic contracture and finger stiffness.13

Following patients were excluded from the study: Paediatric patients. Patients with Frykman Type-II to VIII or comminuted fractures of distal radius. Patients with open fractures of distal radius. Patients not fit for anesthesia. Patients with old Colles fracture (>3 weeks). Patients with very osteoporotic distal radius. Patient lost to follow-up. The pre-operative work-up of every patient included detailed history taking, thorough clinical examination, and routine investigations for anaesthesia fitness like complete blood picture, urine detailed examination, and random blood sugar. Pre-operative biplaner X-rays of the wrist joint , forearm and elbow were taken and the degree of displacement was determined by using goniometer. The details of the patients were entered on a predesigned proforma.

Although, there are several different methods of reduction and fixation of Colles fracture, the aim of treatment plan is to return the patient to normal function. The Colles fracture can be successfully treated by open or closed methods. Colles plaster may not be adequate in all the cases because it cannot control the movements of supination and pronation and the distal fragment gets displaced dorsally. Dorsal comminution leads to dorsal tilt of the radial fragment. Reducing a Colles fracture is not the problem but maintenance of the reduction is certainly a big problem, especially when prolonged immobilization is required, often reduction is lost in early treatment. In many patients, incomplete restoration of radial length or secondary loss of reduction results in the complications of Colles fracture.9

Closed reduction and manipulation was done, followed by percutaneous Kirschner wire (1.8mm) fixation of displaced Colles fracture through one pin passed in the radial styloid across the fracture using power drill while the assistant maintained the reduction. In the second step, one pin was passed in the interval between first and second dorsal extensor compartment, the reduction and pin position was checked by fluoroscopic image intensification or X-ray. After treatment, the arm was immobilized in a cast above the elbow with the forearm and wrist in neutral position for six weeks (Figs.1-4). Kirschner wires were removed at six weeks followed by wrist support with a suitable splint, and physiotherapy of the wrist started.

To achieve this goal with an easily executed technique, which carries a low morbidity, is desirable especially in poly trauma patient. Percutaneous Kirschner wire fixation is relatively simple to perform and teach, and it produces results that are superior to closed reduction alone.14,15 Widespread availability of necessary equipment and the comparatively more secure stabilization of redisplaced fracture when compared to cast support, make the method popular.16

The data of the patients was collected and analyzed statistically. Age, radial angle, palmar angle and radial 32


Percutaneous K-wire fixation of displaced Colles Fracture

Fig.1. Pre-operative Colles Fracture length were evaluated by their mean ± standard deviation (SD), while their pre and post-operative comparison was done by the paired t-test. The mechanism of injury, complications and functional status were represented by their percentages and evaluated by Chi-Square test. A 95% confidence interval (CI) was also estimated.


The post-operative complications were recorded, and

Fig.2. Percutaneous K-wire fixation of displaced Colles Fracture

Fig.3. Percutaneous K-wire fixation of displaced Colles Fracture with case support

Fig.4. Colles Fracture after the removal of Kirschner wires

33


Percutaneous K-wire fixation of displaced Colles Fracture Results


Points

Criteria

Excellent

90 to 100

Radial

Accept not >5o loss of radial

Good

80 to 89

angle

angle (mean radial angle 23o)

Fair

65 to 79

Radial

Accept not >2 mm shortening

Poor

20o volar tilt

angle

(mean palmar angle 11o)

65

Table I. Results by Cooneys scoring the clinical and functional results assessed according to Cooneys scoring system (Table I) and radiological evaluation (radial tilt, radial length and palmar tilt) according to Weilands criteria1-3 (Table II).

Statement

Table II. Weilands Criteria The minimum follow-up of the patients was 12 weeks and maximum 18 months, however final evaluation was done at six weeks after surgery. There was statistically significant differences between the pre-operative and the post-operative findings, on the average, regarding radial angle, radial length and palmar angle as depicted in Table III.

RESULTS

Amongst the 33 patients with Type-I Frykmans displaced Colles fracture there were 19 (57.58%) females and 14(42.42%) males, sex ratio being 1.3:1. Their mean age was 45.45±14.13. The ages of males ranged from 18-60 years (mean age 37.86±11.45 years) and those All patients achieved union and maintained good reducof females between 27-65 years (mean age 51±13.53 tion after closed reduction and the percutaneous Kirschyears). Eighteen patients had fracture of the left wrist ner wire fixation of the Colles fracture. Complications and 15 patients that of the right wrist. Majority of the were seen in 17 cases after surgery; these included finfractures i.e. 28 occurred as a result of a fall, while in ger, wrist or shoulder stiffness, pressure sore, sympathetic five patients the Colles fracture was caused by road dystrophy, pin tract infection and loss of pin reduction traffic accident (RTA). (Table IV). Table III. Comparison of Pre and Post-operative findings Measurement

Mean Pre-Op.

Mean Post-Op.

T-Test

P-Value

16.36 ± 1.88

20.0 ± 1.92

10.82

0.001

Palmar angle (degree)

-6.8 ± 1.48

12.54 ± 2.33

19.74

0.001

Radial length (mm)

8.24 ± 0.83

10.39 ± 0.86

9.60

0.001

Radial angle (degree)

Table IV. Complications after percutaneous Kirschner wire fixation Complications

Number

Percentage

Finger / Wrist stiffness

9

27.2

14.1-44.2

Pin tract infection

1

3.0

0.2-14.0

Loss of reduction of pin

2

6.1

1.0-18.6

Pressure sore

3

9.1

2.3-22.7

Reflex sympathtic dystrophy

1

3.0

0.1-14.1

Shoulder stiffness

1

3.0

0.1-14.1

34

Confidence Interval (95%)


Percutaneous K-wire fixation of displaced Colles Fracture The functional outcome was almost satisfactory according to Cooneys criteria as depicted in the Table V; 7 (21%) cases had excellent, 25 (76%) good and one (3%) fair result.


fracture fragments but it is limited to the extra-articular Colles fracture or fractures with minimal intra-articular involvement.23 At present arthroscopic reduction is available for the management of distal radius fractures, which claim better results than the conventional treatment of such injuries.24

DISCUSSION In this part of the world this fracture is usually treated by close manipulative reduction and application of POP cast. The reduction may be lost during application of plaster as it may not be properly held by the assistant or it may be lost when the oedema subsides and the cast becomes loose, resulting in deformity and some functional loss. It is a well known fact that in Colles fracture anatomical results affect the final function. Malunited Colles fracture results in a weak, deformed, stiff and painful wrist.5-7,17 External fixator is another option widely used for the Colles fracture all over the world.18-20 However it is mainly indicated in comminuted or open fractures, and requires skilled personnel and sophisticated instruments for application. In addition external fixator is highly expensive. K-wires on the other hand are cheap and very simple to apply; they does not require a highly skilled person and complicated tools for application.

There are few disadvantages of percutaneous pinning like the fear of pin tract infection, besides another minor procedure is required for their removal. In this study there were nine (27.2%) cases of finger wrist stiffness, though Cooney et al9 described nine (5.1%) cases out of their total 177 patients. We assume that the finger wrist stiffness in our patients occured due to the tight plaster cast and failure to participate in early physiotherapy of the wrist and hand. Three (9.1%) patients in this study developed pressure sores; all were related to incorrect casting, while two (6.1%) had loss of reduction of pins, probably due to wrong placement. Mahet and Atkinson25 also reported secondary displacement of pins in three patients out of 32. We realize that technical error in pinning, quality of bone (osteoporosis), fracture comminution and external cast support are important factors that may affect pin fixation.

In this study the mean radial angle was 20±1.92o, radial length 10.39±0.86 mm and palmar angle 12.54o. These parameters are comparable to other studies elsewhere. Benoist and Freeland21 reported an average 24.75o radial angle and a mean radial shortening of 2.3mm in 61 consecutive patients, while Fuji22 reported 20.7o in 22 patients. The mean radial length and an average shortening of 1.61 mm in this study are comparable to the published finding of McQueen17 of more than 2mm radial shortening in 33 patients. In this study the mean pre-operative palmar angle was 6.84±1.48o. However, Rosenthal and Chang14 quoted a palmar angle of 13.3o and Fuji22 2.7o in 22 patients. In this study, the postop. palmar angle was 12.54±2.3o.

There was not a single case of carpal tunnel syndrome or Volkmans ischemia in this study, though one (3%) patient developed reflex sympathetic dystrophy (RSD). Low and Chew26 also reported two cases of RSD in their study of 177 fractures. Recent reports suggest that the gold standard for the management of RSD is early recognitation and prompt treatment.27,28 We successfully managed the patient by early commencement of treatment with sympathetic blockers, analgesics and intensive physiotherapy of the wrist. In the current study one (3%) case developed shoulder stiffness, probably due to unnecessary voluntary shoulder immobilization for fear of fracture displacement. Munson and Gainor29 reported two cases of superficial pin tract infection in 22 of their patients, while in our

Percutaneous pinning with Kirschner wire is simple, minimally invasive, and prevents re-displacement of

Table V. Results of percutaneous K-wire fixation in displaced Colles Fractures Results Excellent

Number

Percentage

Confidence Interval (95%)

7

21.2

9.7-35.7

Good

25

75.8

59.1-88.0

Fair

1

3.0

2.3-22.7

Total

33

100.0

35

--


Percutaneous K-wire fixation of displaced Colles Fracture study one (3%) patient developed superficial pin tract infection, which was managed by cleansing of the pin site and administration of antibiotics. It finally resolved after the pin removal.


adults; a thirty years follow up. J Hand Surg Br 1993; 18: 45-9. 8. Crawford AJ, David LH. Elbow and Forearm. In: Lesly J, editor. Outline of Fractures including Joint Injuries, 11th ed. Edinburgh: Churchill Livingstone; 1999. p.164-73.

In our study functional assessment revealed 21% excellent, 76% good and 3% fair results. Low et al26 published functional results of their 177 patients, and claimed a 30% excellent, 62% good and 8% fair results. Carlos30 in his article reported 60% excellent, 30% good and 10% fair results. Local studies15,31 with intra-articular Colles fracture, fixed with K-wire have also shown 80 to 95% good to excellent results.

9. Cooney WP, Dohyns JH, Linscheid RL. Complications of Colles fractures. J Bone Joint Surg 1980; 62A: 613-19. 10. Frykman G. Fracture of the distal radius including sequelae shoulder hand finger syndrome disturbance in the distal radio ulnar joint and impairment of nerve function. A clinical and experimental study. Acta Orthop Scand 1967; Suppl-108: 3.

CONCLUSION This study demonstrates that percutaneous Kirschner wire pinning is a minimally invasive technique that provides an effective means of maintaining the anatomical fracture reduction. It does not required highly skilled personnel or sophisticated tools for application. It is a suitable method for fixation of displaced Colles fracture with minimal intra-articular involvement.

11. Szabo RM .Extra-articular fractures of the distal radius.Orthop Clin North Am 1993; 24: 229-37. 12. Older RM, Stabler EV, Cassebaum WH. Colles fracture: Evaluation and selection of therapy. J Trauma 1965; 5: 469-76.

REFERENCES 13. Sternbach G. Abraham Colles fracture of the carpal extremity of radius. J Emerg Med 1985; 2: 447-50.

1. Metz VM, Gilula LA. Imaging techniques for the distal radius fractures and related injuries. Orthop Clin Am 1993; 24: 217-26.

14. Rosenthal AH, Chung KC. Intrafocal pinning of distal radius fracture. Ann Plastic Surg 2002; 48: 593-9.

2. Earnshaw SA, Aladin A, Surandran S, Morgan C G. Closed reduction of Colles fracture: Comparison of manual manipulation and finger traction. J Bone Joint Surg (Am) 2002; 84A: 354-58.

15. Baig MA. Colles fracture fixation by percutaneous K-wire. The Professional 2005 Mar; 12(1): 99-104.

3. Benjamin A. Injuries of the Forearm. In: Wilson J, editor. Watson Jones Fracture and Joint Injuries, 6th ed. Edinburgh: Churchall Livingstone; 1982. p.688-700.

16. Putaman MD, Seitz WH. Fractures of the distal radius. In: Robert W, James D, editors. Rockwood and Greens Fracture in Adults, 5th ed. Philadelphia: Lippincott, Williams & Willkins; 2001. p.840-43.

4. Wigderowitz CA, RowleyDI, Mole PA, Peterson CR, Abel EW. Bone mineral density of radius in patients with Colles fracture. J Bone Joint Surg Br 2000; 82(6): 930-31.

17. McQueen M, Caspers J. Colles fractures: Does ana tomical result affect the final function. J Bone Joint Surg Br 1988; 70(4): 649-54. 18. Saeed KM, Ghouri SK, Ahmad I. Outcome of comminuted distal radial fracture treated by N. A. fixator. J Pak Orthop Assoc 2004 Feb; 15(1): 5-11.

5. Gupta R, Raheja A, Modi U. Colles fracture management by percutaneous crossed pin fixation versus plaster of Paris cast immobilization. Orthopedics 1999; 22: 680-82. 6. Wardsworth TG. Colles fracture. Br Med J 1990 ; 301: 192-94.

19. Weber KD, Reader F, Brauer RB, Weiss S. External fixation of distal radial fracture: Four compared with five pins. J Bone Joint Surg Am 2003 April; 85A: 660-66.

7. Kopylov P, Johnell O, Reddlund JI, Bengher U. Fractures of the distal end of the radius in young

20. Cooney WP, Dobyns JH, Linschied RL. External pin fixations for unstable Colles fracture. J Bone 36


Percutaneous K-wire fixation of displaced Colles Fracture


26. Low CK, Liau KH, Chew WY. Results of distal radial fractures treated by intrafocal pin fixation. Ann Acad Med 2001; 30: 573-76.

Joint Surg 1979; 61A: 840. 21. Benoit LA, Freeland AE. Buttress pinning in the unstable distal radius fracture.A modification of Kapandji technique. J Hand Surg Br 1995; 20: 82.

27. Sarmiento A, Zagorski JB. Functional bracing of Colles fractures. A prospective study of immoblizatiom in supination versus pronation. Clin Orthop Relat Res 1980; 146: 175-87.

22. Fuji K, Hemi T, Kanematsu Y, Mishiro T, Sakai T, Terai T. Fracture of the distal end of the radius in elderly patients: A comparative study of anatomical and functional results. J Orthop Surg 2002; 10:9-15.

28. Coony WP. Management of Intra-articular fractures of the distal end of radius. Contemp Orthop 1990; 21: 71.

23. Clancey GJ. Percutaneous Kirschner wire fixation of Colles farcture. J Bone Joint Surg Am 1984; 66: 1008-14.

29. Munson GO, Gainor BJ. Percutaneous pinning of distal radius fractures. J Trauma 1981; 21: 1032-5.

24. Doi K, Hattori Y, Otsuka K, Abe Y, Yamamoto H. Intra-articular fracture of the distal end of the radius: Arthroscopically assisted reduction compared with open reduction and internal fixation. J Bone Joint Surg Am 1999; 81: 1093-110.

30. Carlos RME. Plaster cast versus Percutaneous pin fixation for comminuted fractures of the distal radius in patients between 46 and 65 years of age. J Orthop Trauma 1997; 11(3): 212-7.

25. Mah ET, Atkinson RN. Percutaneous Kirschner wire stabilization following the closed reduction of Colles fractures. J HandSurg Br 1992; 17: 55-62.

31. Saeed KM, Ghouri SK, Ahmad I. Outcome of comminuted distal radial fracture treated by N. A. fixator. J Pak Orthop Assoc 2004 Aug; 16(2): 108-115.

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