See also Chapter 7, LIA technique for TKA
• Bupivacaine 0.25% or ropivacaine 0.25% delivered
Review of evidence
intra-articularly as wel as subcutaneously at the
• Four clinical trials have shown a beneficial effect of
donor site, via indwel ing catheter, at at least 4 mL/h
continuous delivery of ropivacaine (Andersen KV et al.
for 48 h, improves pain relief and reduces opioid
2010; Bianconi et al. 2003; Gomez-Cardero & Rodriguez-
Merchan 2010) or bupivacaine (Ong et al. 2010) through
• Further large studies are needed to establish the
an indwel ing catheter fol owing TKA.
role of different catheter locations (intra-articular vssubcutaneous donor sites, or at both sites), as wel as
• These studies used multiholed catheters, placed
optimal drug concentration, combination regimens
subcutaneously or intra-articularly. One study used two
catheters, placed subcutaneously and intra-articularly
• CFNB is superior to surgical site catheter analgesia.
• Continuous surgical site infusion seems to be a good
• One study compared continuous ropivacaine infusion
alternative in patients when CFNB is not possible.
using an intra-articular multiholed catheter and an extra-articular catheter (Dobrydnjov et al. 2011).
• Three studies investigated the efficacy of bolus
bolus administration of ropivacaine (Andersen LØ et al.
administration of ropivacaine via intracapsular
(Andersen LØ et al. 2010a; Andersen LØ et al. 2010b)
• A comparison of high volume vs high concentration of
or subcutaneous (Andersen LØ et al. 2010c) catheters.
ropivacaine also showed no difference in efficacy fol owing
• Four continuous infusion studies reported positive
bolus administration (Andersen LØ et al. 2010b).
outcome measures, including reduced pain at rest and
• Bolus administration of subcutaneous ropivacaine did not
during movement and reduced opioid consumption,
show any improvement in pain scores compared with
compared with placebo (Bianconi et al. 2003, Gomez-
placebo (Andersen LØ et al. 2010c). There was no
Cardero & Rodriguez-Merchan 2010), epidural infusion
additional benefit of a bolus intra-articular infiltration of
+ intravenous anaesthesia (Andersen KV et al. 2010) or
ketorolac, morphine and bupivacaine, compared with
intravenous morphine (Ong et al. 2010).
continuous infusion of levobupivacaine (Ong et al. 2010).
• There was no evidence of local or systemic toxicity.
• A comparison of intra-articular vs extra-articular
catheter placement showed no difference in pain scoresor opioid consumption fol owing continuous infusion ofropivacaine (Dobrydnjov et al. 2011).
• A comparison of intracapsular vs intra-articular catheter
placement showed no difference in efficacy fol owing
Practical details for TKA
intracapsular with intra-articular catheter placement
(Andersen LØ et al. 2010a). One study of continuous
• Multiholed catheters were used in al studies.
infusion compared intra- with extra-articular catheter
• There are no comparative studies between catheter types.
placement (Dobrydnjov et al. 2011). One study used
two catheters, placed subcutaneously and intraarticularly
A fenestrated catheter is advisable, in order to cover more
extensively the surgical incision and improve the local
A fenestrated catheter is advisable, in order to cover more
extensively the surgical incision and improve the localanaesthetic spread.
• In one study the catheter was placed under direct
visualization on the subcutaneous suprapatel ar space(Bianconi et al. 2003). In two studies the catheter wasplaced subcutaneously (Andersen KV et al. 2010,Andersen LØ et al. 2010c). Catheters were also placedintracapsularly (Andersen LØ et al. 2010b) andintra-articularly (Gomez-Cardero & Rodriguez-Merchan,2010). One study of bolus administration compared
Number Catheter type Preclosure Postoperative Publication Grade* of (1–13) and location administration Outcomes patients
24 h. High concentration:ropivacaine 1.0%, 10 mL at6 h and ropivacaine 0.5%,20 mL at 24 h
Table 6. Summary of literature for total knee arthroplasty. Publication Grade* Catheter type Preclosure Postoperative (1–13) of patients and location administration Outcomes Table 6 cont. Summary of literature for total knee arthroplasty. Number Catheter type Preclosure Postoperative Publication Grade* of (1–13) and location administration Outcomes patients Table 6 cont. Summary of literature for total knee arthroplasty. *see page 15 for grading of publications.
progresses, according to a ‘moving needle technique’ to
• At surgical closure, infiltration of the wound layers al
avoid accidental intravascular drug injection. This seems to
along the wound length with ropivacaine 0.5% (Bianconi
offer improved postoperative analgesia when combined
et al. 2003) or ropivacaine 2 µg/mL + epinephrine
with continuous local anaesthetic infusion via a catheter.
10 mg/mL (Andersen LØ et al. 2010a; Andersen LØ
et al. 2010b; Andersen LØ et al. 2010c) or ropivacaine2 mg/mL + ketorolac 30 mg/mL + epinephrine
1 mg/mL (Andersen KV et al. 2010, Dobrydnjov et al.
• Continuous subcutaneous or intra-articular infusion of
2011), or ketorolac 1 mL + morphine 10 mg +
ropivacaine 0.2% was performed at a flow rate of up to
bupivacaine 100 mg (Ong et al. 2010) was performed,
5 mL/h for up to 60 h (Andersen KV et al. 2010, Bianconi
before starting continuous infusion. et al. 2003, Gomez-Cardero & Rodriguez-Merchan 2010).
Continuous intra-articular or extra-articular infusion of
Large bolus infiltration of ropivacaine 0.5% results in safe
ropivacaine 0.5% was performed at a flow rate of 2 mL/h
plasma concentrations (assessed by pharmacokinetic
for 48 h (Dobrydnjov et al. 2011). Continuous
evaluation; Bianconi et al. 2003); its application is suggested.
subcutaneous and intra-articular infusion of bupivacaine
Large perioperative bolus infiltration of ropivacaine 0.2%,
0.25% was performed for 48 h (Ong et al. 2010).
with adjuvant ketorolac and epinephrine into the posterior
joint capsule and surrounding surgical layer, or with
Continuous infusion of ropivacaine 0.2%, 5 mL/h has
adjuvant ketorolac (without epinephrine) in the
proved to be effective and safe. Intraoperative infiltration of
subcutaneous tissues was performed as the operation
the capsular joint with a mixture of ropivacaine, ketorolac
and epinephrine was not associated with any significant
complications or impairment of wound healing.
• Perioperative intra-articular infiltration and
postoperative continuous infusion of ropivacaine
improves postoperative pain relief and reduces opioid
• Infusion duration was up to a maximum of 60 h.
requirements after major joint replacement surgery.
• There are no comparative studies on optimal duration
• Additional wel -designed studies are needed to
establish the effectiveness and safety of a
combination of intra-articular and subcutaneous
continuous surgical site infusion compared with
Infusion duration of at least 48 h is suggested, but duration
single-shot infiltration. Further investigations are
should be tailored to the patient’s needs.
needed to determine the best catheter location, the
optimal drug or combination of drugs, and the mostappropriate infusion duration.
and wound infusion after anterior cruciate ligament reconstruction. For a list of additional references and suggestions for further reading,Reg Anesth Pain Med 2009;34:95–9. see Appendix 4. See also Chapter 7, LIA technique for TKA.
Dobrydnjov I, Anderberg C, Olsson C, et al. Intraarticular vs
Alford JW, Fadale PD. Evaluation of postoperative bupivacaine
extraarticular ropivacaine infusion fol owing high-dose local
infusion for pain management after anterior cruciate ligament
infiltration analgesia after total knee arthroplasty. A randomized
reconstruction. Arthroscopy 2003;19:855–61.
double-blind study. Acta Orthop 2011;82:692–698.
Andersen KV, Bak M, Christensen BV, et al. A randomized,
Gomez-Cardero P, Rodriguez-Merchan EC. Postoperative analgesia
control ed trial comparing local infiltration analgesia with epidural
in TKA: ropivacaine continuous intraarticular infusion. Clin Orthop
infusion for total knee arthroplasty. Acta Orthop 2010;81:606–10.
Andersen LØ, Gaarn-Larsen L, Kristensen BB, et al. Analgesic efficacy
Hoenecke HR, Pulido PA, Morris BA, Fronek J. The efficacy of
of local anaesthetic wound administration in knee arthroplasty:
continuous bupivacaine infiltration fol owing anterior cruciate
volume vs concentration. Anaesthesia 2010a;65:984–90.
ligament reconstruction. Arthroscopy 2002;18:854–8.
Andersen LØ, Husted H, Kristensen BB, et al. Analgesic efficacy of
Ong JCA, Lin CP, Fook-Chong SMC, et al. Continuous infiltration of
subcutaneous local anaesthetic wound infiltration in bilateral knee
local anaesthetic fol owing total knee arthroplasty. J Orthopaed Surg
arthroplasty: a randomised, placebo-control ed, double-blind trial. Acta Anaesthesiol Scand 2010c;54:543–8.
Parker RD, Streem K, Schmitz L, et al. Efficacy of continuous intra-
Bianconi M, Ferraro L, Traina GC, et al. Pharmacokinetics and efficacy
articular bupivacaine infusion for postoperative analgesia after
of ropivacaine continuous wound instil ation after joint replacement
anterior cruciate ligament reconstruction. Am J Sports Med
surgery. Br J Anaesth 2003;91:830–5.
Curry CS, Brown DL, Ruterbories L, et al. Localization of pain
Vintar N, Rawal N, Veselko M. Intrarticular patient-control ed
fol owing arthroscopic anterior cruciate ligament repair using
regional anesthesia after arthroscopical y assisted anterior cruciate
differential local anesthetic infiltration. Anesth Analg 1996;82:S81.
ligament reconstruction:ropivacaine/morphine/ketorolac versus
ropivacaine/morphine.Anesth Analg 2005;101:573–8.
Dauri M, Fabbi E, Mariani P, et al. Continuous femoral nerve block
provides superior analgesia compared with continuous intra-articular
Myotonia Congenita Introduction This paper is to provide information for school staff regarding a condition known as myotonia congenita which has been diagnosed in your student, _______________________________________________________ (student name). The following is for informational purposes only and is not to be used for diagnosis or treatment of myotonia congenita. Myotonia Co
SURGERYSurgery is undertaken to clear lesions which cannot be managed by simpler means. As illustrated a margin of healthy tissue is re-moved around the lesion so that the lab can examine it under the microscope to determine the characteristics and complete excision. You will note that a simple excision illustrated is aligned into the skin folds for best scar results and takes the shape of an